International Commission on Zoological Nomenclature:
OPINIONS and DIRECTIONS


taxa names:

Tr

trachea Montagu 1811 [originally in Fasciola], Mem. werner. nat. Hist. Soc., 1: 197 (specific name of the type species of Syngamus Siebold 1836) (Nematoda). Direction 77  

trachealis Siebold 1836 [originally in Syngamus], Arch. Naturgesch., 2(1): 105 (a junior objective synonym of trachea Montagu 1811 [originally in Fasciola]). Direction 76

TRACHEIDAE Laporte 1835, Revue Entomologique, 3: 166, spelling emended from TRACHISIDAE by the ruling under the plenary power that the stem of Trachys Fabricius Fabricius 1801 is Trache- (Coleoptera). Opinion 2222  

Trachelocerca Ehrenberg [1834], Abhandlungen der Preussischen Akademie der Wissenschaften zu Berlin, 1833: 316, issued in the serial in 1835 but published as a separate in 1834, and all uses of that name prior to the publication of Trachelocerca Ehrenberg 1840 (suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy) (Ciliophora). Opinion 1923  

Trachelocerca Ehrenberg 1840, Monatsberichte und Verhandlungen der Königlichen Preussischen Akademie der Wissenschaften zu Berlin, 1840: 202 (gender: feminine) (type species, by monotypy: Vibrio sagitta Müller 1786) (Ciliophora). Opinion 1923 

Trachelus Jurine 1807, Nouvelle méthode de classer les Hyménoptères et les Diptères, vol. 4(II), Genève & Paris, pp. 70–72, plate 2, fig. 9 (gender: masculine) type species by subsequent designation by Rohwer (1911a) Sirex tabidus Fabricius 1775, ruled under the Plenary Power to be given precedence over the name Astatus Panzer [1801], whenever the two are considered to be synonyms (Insecta, Hymenoptera). Opinion 2306

Trachinus Linnaeus 1758, Systema Naturae, Ed. 10, vol. 1, p. 250 (gender: masculine) (type species, by monotypy: Trachinus draco Linnaeus 1758, Systema Naturae, Ed. 10, vol. 1, p. 250) (Osteichthyes). Opinion 75 

Trachycarcinus Faxon 1893, Bull. Mus. comp. Zool., 24: 156 (gender: masculine) (type species, by monotypy: Trachycarcinus corallinus Faxon 1893, Bull. Mus. comp. Zool., 24: 156) (Crustacea, Decapoda). Opinion 73 

Trachycaris Calman 1906, Ann. Mag. nat. Hist., (7)17: 31, 33 (gender: feminine) (type species, by monotypy: Platybema rugosus Bate 1888, Rep. Voy. Challenger’, (Zool.), 24: 579, valid name: Hippolyte restricta Milne Edwards 1878) (Crustacea, Decapoda). Opinion 470

TRACHISIDAE Laporte 1835, Revue Entomologique, 3: 166, an incorrect original spelling (Coleoptera). Opinion 2222  

TRACHYDINI Reitter 1911, Fauna Germanica. Die Käfer des Deutschen Reiches. Nach der analytische Methode bearbeite, vol. 3, p. 180, incorrectly derived from Trachys Fabricius 1801 (Coleoptera). Opinion 2222

TRACHYINI Gavoy 1901, Bulletin de la Société d’Études Scientifiques de l’Aude, 12: 113, incorrectly derived from Trachys Fabricius 1801 (Coleoptera). Opinion 2222 

TRACHYNI Kerremans 1893, Annales de la Société Entomologique de Belgique, 37: 121, incorrectly derived from Trachys Fabricius 1801 (Coleoptera). Opinion 2222

TRACHYNINI Kraatz 1869, Verzeichniss der Käfer Deutschlands, p. 36, incorrectly derived from Trachys Fabricius 1801 (Coleoptera). Opinion 2222  

Trachypenaeopsis (emendation under the plenary power of Trachypeneopsis) Burkenroad 1934, Bull. Bingham oceanogr. Coll., 4(7): 40 (gender: feminine) (type species, by original designation: Metapenaeus mobilispinis Rathbun 1915, Proc. biol. Soc. Washington, 28: 117) (Crustacea, Decapoda). Opinion 864  

Trachypenaeus (emendation under the plenary power of Trachypeneus) Alcock 1901, Descr. Cat. Indian Deep Sea Crust.: 15 (gender: masculine) (type species, by original designation: Penaeus anchoralis Bate 1881, Ann. Mag. nat. Hist., (5)8: 181) (Crustacea, Decapoda). Opinion 864

Trachypeneopsis Burkenroad 1934, Bull. Bingham oceanogr. Coll., 4(7): 40 (ruled under the plenary power to be an incorrect original spelling for Trachypenaeopsis Burkenroad 1934). Opinion 864 

Trachypeneus Alcock 1901, Descr. Cat. Indian Deep Sea Crust.: 15 (ruled under the plenary power to be an incorrect original spelling for Trachypenaeus Alcock 1901). Opinion 864  

Trachys Fabricius 1801, Systema Eleutheratorum secundum ordines, genera, species: adjectis synonymis, locis, observationibus, descriptionibus. Tomus II, p. 218 (gender, as ruled under the plenary power: masculine), stem ruled under the plenary power to be Trache-, type species by subsequent designation by Westwood (1838) Buprestis minuta Linnaeus 1758 (Coleoptera). Opinion 2222  

Tragardhula Berlese 1912, Redia, 8: 4 (a junior objective synonym of Blankaartia Oudemans 1911). Opinion 655  

Tragulus Boddaert 1785, Elenchus Animalium, vol. 1 (Sistens Quadrupedia), pp. 49, 131 (a junior homonym of Tragulus Brisson 1762) (Mammalia, Artiodactyla). Opinion 1894 

Tragulus Brisson 1762, Regnum Animale in classes IX distributum, sive synopsis methodica, Ed. 2, pp. 12, 65 (gender: masculine) (type species, by designation under the plenary power: Cervus javanicus Osbeck 1765), ruled under the plenary power to be taken as first available from Brisson 1762, despite that being a work rejected for nomenclatural purposes (Mammalia, Artiodactyla). Opinion 1894 

Tragulus Pallas 1767, Spicilegia Zoologica, fasc. 1, p. 6 (a junior homonym of Tragulus Brisson 1762) (Mammalia, Artiodactyla). Opinion 1894  

Tramea Hagen 1861, Smithsonian Miscellaneous Collections, 4: 143 (gender: feminine) (type species, ruled under the plenary power to be by subsequent designation by Kirby 1889, Transactions of the Zoological Society of London, 12: 268: Libellula carolina Linnaeus 1763) (Insecta, Odonata). Opinion 2158

tranquilla Gould 1844 [originally in Geopelia], Proceedings of the Zoological Society of London, 12: 56, with the endorsement that it is not to be given priority over the name placida Gould 1844, as published in the binomen Geopelia placida whenever the two are considered to be synonyms (Aves). Opinion 2240

transbaikalica  Ioff & Tiflov 1946 [originally in Rhadinopsylla (Ralipsylla) li], Med. Parasitol. Moscow, 15 (No. 6): 94 (Insecta, Siphonaptera). Opinion 314

transfuga Brünnich 1763 [originally in Blatta], in Pontoppidan, Den Danske Atlas, 1: 679, pl. 29, ruled under the plenary power not to be given priority over the specific name germanica Linnaeus 1767 [originally in Blatta], whenever the two names are considered synonyms (Insecta, Dictyoptera). Opinion 1231 

transversa Fieber 1848 [originally in Corisa], Bulletin de la Société Impériale des Naturalistes de Moscou, 21(1): 520 (specific name of the type species of Parasigara Poisson 1957) (Insecta, Heteroptera). Opinion 1555 

transversa Say 1829 [originally in Cyclas], Disseminator useful Knowledge, New Harmony, 2: 356 (Bivalvia). Opinion 336 

transversalis A. Villa & G.B. Villa 1833 [originally in Anthicus] (Coleoptera). ICZN 2016: Opinion 2377

transversarius Quenstedt 1847 [originally in Ammonites], Petrefactenkunde Deutschlands. Die Cephalopoden, p. 199 (specific name of the type species of Gregoryceras Spath 1924) (Ammonoidea). Opinion 2123  

transversus Rathbun 1893 [originally in Opisthopus], Proc. U.S. nat. Mus., 16 (No. 933): 252 (specific name of the type species of Opisthopus Rathbun 1893) (Crustacea, Decapoda). Direction 36 

Trapecia Berthold 1827, Latreille’s natürliche Familien des Thierreichs aus dem Französischen mit Anmerkungen und Zusätzen, p. 255 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Crustacea, Decapoda). Opinion 1614

Trapezia Latreille 1828, Encyclopédie méthodique d’Histoire naturelle (Insectes), vol. 10, p. 695 (gender: feminine) (type species, by subsequent designation by H. Milne Edwards 1842, vol. 18 - Les Crustacés, in Cuvier, Le Règne Animal, Disciples Edition, pl. 14: Trapezia dentifrons Latreille 1828, a junior subjective synonym of Cancer cymodoce Herbst 1801) (Crustacea, Decapoda). Opinion 1614

Trapezicollis Sahlberg 1903 (Coleoptera). ICZN 2016: Opinion 2377

Trapezicomus Pic 1894 (Coleoptera). ICZN 2016: Opinion 2377

TRAPEZIDAE Lamy 1920, Journal de Conchyliologie, 64(4): 265 (type genus: Trapezium Megerle von Mühlfeld 1811), it being ruled under the plenary power that for the purposes of Article 29 of the Code the stem of the generic name Trapezium Megerle von Mühlfeld 1811 is TRAPEZ- (Bivalvia). Opinion 1615  

trapeziformis Nauck 1880 [originally in Holothuriophilus], Z. wiss. Zool., 34: 66 (specific name of the type species of Holothuriophilus Nauck 1880) (Crustacea, Decapoda). Direction 36

TRAPEZIIDAE Miers 1886, Report of the scientific results of the voyage of H.M.S. Challenger, (Zoology, Part 49), vol. 17, p. 163 (type genus: Trapezia Latreille 1828) (Crustacea, Decapoda). Opinion 1615 

Trapezium Megerle von Mühlfeld 1811, Magazin für die neuesten Entdeckungen in der gesammten Naturkunde von Der Gesellschaft Naturforschaft Freunde zu Berlin, 5: 68 (gender: neuter) (type species, by subsequent designation by Stewart 1930, Academy of Natural Sciences of Philadelphia, Spec. pub. no. 3, p. 173: Trapezium perfectum Megerle von Mühlfeld 1811, a junior subjective synonym of Chama oblonga Linnaeus 1758) (Bivalvia). Opinion 1615 

trapezium Dana 1852 [originally in Sesarma], Crustacea, in: U.S. Exploring Expedition under the command of Charles Wilkes, U.S.N., 13(1): 354, ruled under the plenary power not to be given priority over the specific name rubripes Rathbun 1897, as published in the binomen Sesarma rubripes, whenever the two names are considered synonyms (Crustacea, Decapoda). Opinion 1140  

Trapezostigma Hagen 1849, Entomologische Zeitung, Stettin, 10(6): 174 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Insecta, Odonata). Opinion 2158 

Traumatomutilla André 1901, Z. f. Hymen. Dipt., 1: 257, 258 (gender: feminine) (type species, by designation by André 1903 (in Wytsman’s Gen. Ins., 1 (fasc. 11): 55): Mutilla indica Linnaeus 1758, Systema Naturae, Ed. 10, vol. 1, p. 583) (Insecta, Hymenoptera). Opinion 542

tredecimguttata Rossi 1790 [originally in Aranea], Fauna Etrusca, 2: 136 (specific name of the type species of Latrodectus Walckenaer 1805) (Arachnida). Direction 67 

Tremataspis Schmidt 1866, Verh. russ. min. Ges. St. Petersburg, (2)1: 233 (gender: feminine) (type species, by designation under the plenary power: Tremataspis schmidti Rohon 1892, Mém. Acad. imp. Sci. St. Pétersbourg, (7)38(13): 61) (Agnatha). Opinion 222

Trematospira Hall in Davidson 1858, The Geologist, 1: 412, and all uses of the name prior to the publication of Trematospira Hall 1859 (suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy) (Brachiopoda). Opinion 1900

Trematospira Hall 1859, New York State Cabinet of Natural History, Annual Report, 12: 27 (gender: feminine) (type species, ruled under the plenary power to be by subsequent designation by Hall & Clarke 1893, Paleontology of New York, 8(2): 126: Spirifer multistriatus Hall 1857) (Brachiopoda). Opinion 1900

tremula Linnaeus 1767 [originally in Holothuria], Systema Naturae, Ed. 12, vol. 1, part 2, p. 1090 (specific name of the type species of Holothuria Linnaeus 1767) (Holothuroidea). Direction 73  

trentonensis Nicholson 1875 [originally in Retepora], Geological Magazine, New Series, Decade 2, 2: 37, specific name of the type species of Phylloporina Ulrich in Foerste 1887 (Bryozoa). Opinion 2281.

Trepsichrois Hübner 1816, Verz. bekannt. Schmett. (1): 16 (gender: feminine) (type species, by designation under the plenary power: Papilio mulciber Cramer 1777, Uitl. Kapellen, 2: 45, 150, pl. 127, figs. C, D) (Insecta, Lepidoptera). Opinion 990 

tresselata Milne Edwards 1834 [originally in Lybia], in Roret’s Suites à Buffon, Hist. nat. Crust., 1: 431 (an incorrect subsequent spelling for tesselatus Latreille 1812 [originally in Grapsus]). Direction 37 

TRETASPINAE Whittington 1941, J. Paleontol., 15: 23 (type genus: Tretaspis McCoy 1849) (Trilobita). Opinion 505  

Tretaspis McCoy 1849, Ann. Mag. nat. Hist., (2)4: 410 (conserved under the plenary power) (gender: feminine) (type species, by designation by Bassler 1915 (Bull. U.S. nat. Mus., 92: 1285): Asaphus seticornis Hisinger 1840, Lethaea svec., Suppl. sec.: 3) (Trilobita). Opinion 505  

Tretaspis Murchison 1839, Silurian System: 217, nota (suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy). Opinion 505

Triacanthagyna Selys 1883, Bulletin de l’Académie Royal de Belgique, (3)5: 745 (gender: feminine) (type species, by monotypy: Gynacantha trifida Rambur 1842) (Insecta, Odonata). Opinion 2148 

Triacodon Marsh 1871, American Journal of Science, (3)2: 123 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Mammalia, Carnivora). Opinion 1517

Triaena Tullberg 1871, Öfvers. K. Vetensk.Akad. Förh., 28: 155 (a junior homonym of Triaena Hübner 1818). Opinion 1049

triangularis Branson & Mehl 1933 [originally in Ambalodus], University Missouri Studies, 8(2): 128, pl. 10, figs. 35-37 (specific name of the type species of Ambalodus Branson & Mehl 1933) (Conodonta). Opinion 796

triangularis Martin 1809 [originally in Conchyliolithus Anomites], Petrif. derb.: sign. Q[3], pl. 36, fig. 2 (included in a work rejected for nomenclatural purposes). Opinion 420

triangularis Sowerby 1827 [originally in Spirifer], Min. Conch., 6: 120, pl. 562, figs. 5, 6, as interpreted by the lectotype designated and figured by Muir-Wood 1951 (Ann. Mag. nat. Hist., (12)4: 106, pl. 5, figs. 3a-d) (Brachiopoda). Opinion 420

triangulata Bate 1975 [originally in Amicytheridea], Bulletin of the British Museum (Natural History), Geology, 26(5): 192 (specific name of the type species of Amicytheridea Bate 1975) (Ostracoda). Opinion 1740  

triangulatus Harkness 1851 [originally in Rastrites], Quart. J. geol. Soc. London, 7: 59, pl. 1, figs. 3a-d (Graptolithina). Opinion 571 

triangulum Lacepède 1788 [originally in Coluber], Hist. nat. Quad. ovip. Serpens, 2: (table méthodique) 86, 331, ruled under the plenary power to be an available name despite being published in a work ruled to be unavailable (Reptilia). Opinion 804

triangulum Fabricius 1775 [originally in Vespa], Systema Entomologiae, p. 373 (Insecta, Hymenoptera). Opinion 1578 

triangulus Sundevall 1833 [originally in Mitobates], Conspectus arachnidum, p. 34, footnote (Arachnida, Opiliones). Opinion 1703 

triangulus Valenciennes 1819 [originally in Terebratula], in Lamarck, Histoire naturelle des Animaux sans Vertèbres, vol. 6, p. 250 (Brachiopoda). Opinion 1466

Triatoma Laporte [1832], Essai Class. syst. Hémipt.: 11 (Mag. zool., 2, Suppl.) (gender: feminine) (type species, by monotypy: Reduvius gigas Fabricius 1775, Syst. Entomol.: 729, valid name: Cimex rubrofasciatus de Geer 1773) (Insecta, Hemiptera). Opinion 104, Direction 63  

TRIATOMINI Jeannel 1919, Insectes Hémiptères, 3 Voy. Ch. Alluaud et R. Jeannel en Afrique Orientale: 176, 177, 309 (type genus: Triatoma Laporte [1832]) (Insecta, Hemiptera). Direction 109  

Tribolbina Latham 1932, Trans. roy. Soc. Edinburgh, 57: 358 (gender: feminine) (type species, by original designation: Tribolbina carnegiei Latham 1932, Trans. roy. Soc. Edinburgh, 57: 358, 359) (Crustacea, Ostracoda). Opinion 1118

Tribolium MacLeay 1825, Annulosa Javanica, p. 47 (gender: neuter) (type species, by monotypy: Colydium castaneum Herbst 1797) (Insecta, Coleoptera). Opinion 1495

Tribonophora Hübner 1808, Erste Zutr. Samml. exot. Schmett.: 5 (included in a work rejected for nomenclatural purposes). Opinion 789  

tribulus Linnaeus 1767 [originally in Cancer], Systema Naturae, Ed. 12, vol. 1, part 2, p. 1045 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 708

Tricelia [Renier] [1807], [Tav. serv. Class. Conn. Anim.]: Tav. VI (included in a work rejected for nomenclatural purposes). Opinion 436  

Trichaporus Foerster 1856, Hymenopterologische Studien, 2 Heft. Chalcididiae und Proctotrupini. Ernst Meer, Aachen: 84 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 1351

Trichechus Linnaeus 1758, Systema Naturae, Ed. 10, vol. 1, p. 34 (gender: masculine) (type species, by monotypy: Trichechus manatus Linnaeus 1758, Systema Naturae, Ed. 10, vol. 1, p. 34) (Mammalia). Opinion 112  

Trichechus Linnaeus 1766, Systema Naturae, Ed. 12, vol. 1, part 1, p. 49 (a junior homonym of Trichechus Linnaeus 1758). Direction 24 

Trichia De Haan 1839, Fauna Japonica, fasc. 4, pl. 29, fig. 4; pl. H (gender: feminine) (type species, by monotypy: Trichia dromiaeformis De Haan 1839) (Brachyura). Opinion 2079 

Trichia Hartmann 1840, Erd- und Süsswasser-Gasteropoden, p. xiii, footnote (a junior primary homonym of Trichia De Haan 1839) (Gastropoda). Opinion 2079

Trichia Hong 1981, Eocene fossil Diptera Insecta in amber in Fushun coalfield, p. 28 (a junior homonym of Trichia De Haan 1839) (Insecta, Diptera). Opinion 2079

TRICHIINAE Ložek 1956, Klíc Ceskoslovenskych Mékkysu. [Key to Czechoslovakian Mollusca], p. 200 (based on Trichia Hartmann 1840, a junior primary homonym of Trichia De Haan 1839) (Gastropoda). Opinion 2079  

Trichinus Kirby 1827, Zoological Journal, 3(10): 156 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Insecta, Coleoptera). Opinion 2162 

Trichiotinus Casey 1915, Memoirs on the Coleoptera, 6: 381 (gender: masculine) (type species, by original designation: Trichius piger Fabricius 1775) (Insecta, Coleoptera). Opinion 2162 

Trichius Fabricius 1775, Systema Entomologiae, sistens Insectorum classes, ordines, genera, species, p. 40 (gender: masculine) (type species, by subsequent designation by Latreille 1810, Considérations générales sur 1’ordre naturel des animaux, composant les classes des crustacés, des arachnides et des insectes; avec un tableau méthodique de leurs genres, disposés en familles, p. 428: Scarabaeus fasciatus Linnaeus 1758) (Insecta, Coleoptera). Opinion 2079 

Trichocratomerus Richter 1949, Buprestidae. Fauna of the U.S.S.R., vol. 13, no. 2, p. 102 (gender: masculine) (type species, by original designation: Buprestis manca Linnaeus 1767) (a junior objective synonym of Anthaxia Eschscholtz 1829) (Insecta, Coleoptera). Opinion 2009

TRICHODACTYLINAE Milne Edwards 1853, Ann. Sci. nat., Paris (Zool.), (3)20: 163 (type genus: Trichodactylus Latreille [1828]) ruled under the plenary power not to be given priority over POTAMIDAE Ortmann 1896 by those who consider Potamon Savigny 1816 and Trichodactylus Latreille to belong to the same family-group taxon (Crustacea, Decapoda). Opinion 712

Trichodactylus Dufour 1839, Ann. Sci. nat., Paris (Zool.), (2)11: 276 (a junior homonym of Trichodactylus Latreille [1828]). Direction 37

Trichodactylus Latreille [1828], Ency. méth., 10 (Ins.): 705 (gender: masculine) (type species, by monotypy: Trichodactylus fluviatilis Latreille [1828], Ency. méth., 10 (Ins.): 705) (Crustacea, Decapoda). Opinion 73, Direction 37 

Trichodectes Nitzsch 1818, Mag. Entomol. (Germar), 3: 294 (gender: masculine) (type species, by designation by Johnston & Harrison 1911 (Proc. linn. Soc. N.S. Wales, 36: 326): Ricinus canis de Geer 1778, Mém. Hist. Ins., 7: 81, as interpreted by the neotype designated by Clay & Hopkins 1954 (Bull. Brit. Mus. (nat. Hist.) Entomol., 3: 244)) (Insecta, Mallophaga). Opinion 627 

TRICHODECTIDAE Kellogg 1896, Proc. Calif. Acad. Sci., (2)6: 63 (type genus: Trichodectes Nitzsch 1818) (Insecta, Mallophaga). Opinion 627 

Trichodes Herbst 1792, in Jablonsky, Natursyst. aller bek. in-und ausl. Ins., Der Käfer: 154 (gender: masculine) (type species, by designation by Hope 1840 (Coleopterists Manual, 3: 137): Attelabus apiarius Linnaeus 1758, Systema Naturae, Ed. 10, vol. 1, p. 388) (Insecta, Coleoptera). Opinion 1273

Trichoglossus Stephens 1826, in Shaw, Gen. Zool. (Aves), 14(1): 129 (to be treated as having priority over Trichoglossus Vigors & Horsfield 1826) (gender: masculine) (type species, by designation by Lesson 1828 (Manuel Ornithol., 2: 147): Psittacus haematodus (spelling-out of the abbreviated form ‘haematod.’) Linnaeus 1771, Mantissa Plant. (2): 524, as interpreted by the first reviser action by Jardine & Selby [1831] (Ill. Ornithol.: expl. to pls. 111, 112)) (Aves). Opinion 67, Direction 82  

Trichoglossus Vigors & Horsfield 1826, Trans. linn. Soc. London, 15(1): 287 (a junior homonym of Trichoglossus Stephens 1826). Direction 82

TRICHOMONADIDAE Grassi 1882, Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale, 24: 141 (type genus: Trichomonas Donné 1836) (Mastigophora). Opinion 1447 

Trichomonas Donné 1836, Compte Rendu Hebdomadaire des Séances de l’Académie des Sciences, Paris, 3: 386 (gender: feminine) (type species, by monotypy: Trichomonas vaginalis Donné 1836), ruled under the plenary power to be the correct original spelling of Tricomonas (Mastigophora). Opinion 1447 

Tricholepisma Paclt 1967 (Zygentoma). ICZN 2018: Opinion 2427

Trichopeltarion Milne Edwards 1880, Bull. Mus. comp. Zool., 8: 19 (gender: neuter) (type species, by monotypy: Trichopeltarion nobile Milne Edwards 1880, Bull. Mus. comp. Zool., 8: 20) (Crustacea, Decapoda). Opinion 73 

Trichoporus Ashmead 1900, in Smith, Insects of New Jersey, 27th Annual Report State Board of Agr., Trenton. Supplement: 561 (an incorrect subsequent spelling for Trichaporus Foerster 1856). Opinion 1351

Trichopsylla Ewing & Fox 1943, Misc. Publ. U.S. Dep. Agric., No. 500: 55 (a junior homonym of Trichopsylla Kolenati 1863). Opinion 388 

Trichopsylla Jordan & Rothschild 1920, Ectoparasites, 1: 63 (a junior homonym of Trichopsylla Kolenati 1863). Opinion 388 

Trichopsylla Kolenati 1863, Hor. Soc. entomol. ross., 2: 32 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 388 

Trichostrongylus Looss 1905, Zbl. Bakt. (Abt. 1), 39: 413 (gender: masculine) (type species, by original designation: Strongylus retortaeformis Zeder 1800, in Goeze, Versuch Naturg. Eingeweidewürmer, Erst. Nachtr.: 75) (Nematoda). Opinion 66, Direction 76

Tricla Philipsson 1788, Dissertatio Hist. nat. syst. nova Test. Gen.: 8 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 287  

Tricoelia [sic] Renier [1804], Prospetto Classe Vermi: XVIII (included in a work rejected for nomenclatural purposes). Opinion 427  

tricolor Foerster 1878 [originally in Encarsia], Verh. naturf. Ver. preuss. Rheinl., 35: 66 (specific name of the type species of Encarsia Foerster 1878) (Insecta, Hymenoptera). Opinion 1351

tricolor Forbes 1838 [originally in Eubranchus], Malac. Mon.: 5 (specific name of the type species of Eubranchus Forbes 1838) (Gastropoda). Opinion 774 

tricolor Fabricius 1798 [originally in Syrphus], Supplementum entomologiae systematicae, p. 563 (specific name of the type species of Eumerus Meigen 1822) (Insecta, Diptera). Opinion 1747 

tricolorata [Renier] [1807] [originally in Aglaja], [Tav. serv. Class. Conn. Anim.]: Tav. VIII, as interpreted by the neotype designated by Lemche 1974 (Bull. zool. Nomencl., 31: 196-198) (ruled under the plenary power to be an available name) (specific name of the type species of Aglaja [Renier] [1807]) (Gastropoda). Opinion 1079

tricupola Gibson 1973 [originally in Pseudanisakis], J. nat. Hist., 7: 321-334 (specific name of the type species of Pseudanisakis Layman & Borovkova 1926) (Nematoda). Opinion 1086 

tricuspidens Gervais 1877 [originally in Plesiadapis], J. Zool. Paris, 6: 76 (specific name of the type species of Plesiadapis Gervais 1877) (Mammalia). Opinion 1123

tridacnae Peters 1852 [originally in Conchodytes], Ber. Bekannt. geeignet. Verh. K.-preuss. Akad. Wiss., Berlin, 1852: 594 (specific name of the type species of Conchodytes Peters 1852) (Crustacea, Decapoda). Opinion 383  

Tridacnigenus [Renier] [1807], [Tav. serv. Class. Conn. Anim.]: Tav. VII (included in a work rejected for nomenclatural purposes). Opinion 427

Tridacnocaris Nobili 1899, Ann. Mus. Stor. nat. Genova, 40: 235 (a junior objective synonym of Anchistus Borradaile 1898). Opinion 470

tridactyla Linnaeus 1758 [originally in Myrmecophaga], Systema Naturae, Ed. 10, vol. 1, p. 35 (specific name of the type species of Myrmecophaga Linnaeus 1758) (Mammalia). Direction 22

tridactyla Linnaeus 1758 [originally in Phalaena], Systema Naturae, Ed. 10, vol. 1, p. 542, as defined by the lectotype designated by Robinson & Nielsen 1983, Systematic Entomology, 8: 234, ruled by the Commission to have precedence over the name of its objective synonym Phalaena tetradactyla Linnaeus 1758 (Insecta, Lepidoptera). Opinion 2041 

tridactylum Cuvier 1827 [originally in Amphiuma], Mémoires du Muséum d’Histoire Naturelle, 14: 7 (Amphibia, Caudata). Opinion 1733  

Tridactylus Olivier 1789, Ency. méth., 4 (Ins.): 26 (gender: masculine) (type species, by monotypy: Tridactylus paradoxus Latreille [1802], in Sonnini’s Buffon, Hist. nat. gén. partic. Crust. Ins., 3: 276) (Insecta, Orthoptera). Opinion 149

tridactylus Osborn 1893 [originally in Aceratherium], Bull. amer. Mus. nat. Hist., 5: 85, 86 (Mammalia). Opinion 659

tridactylus Linnaeus 1758 [originally in Bradypus], Systema Naturae, Ed. 10, vol. 1, p. 34 (specific name of the type species of Bradypus Linnaeus 1758) (Mammalia). Direction 22

tridens Fabricius 1798 [originally in Cancer], Suppl. Entomol. syst.: 340 (a junior primary homonym of tridens Herbst 1790 [originally in Cancer]). Opinion 712 

tridens Herbst 1790 [originally in Cancer], Versuch Naturgesch. Krabben Krebse, 1(8): 267 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 712

tridens Krøyer 1837 [originally in Geryon], Naturhist. Tidsskrift, 1(1): 10, 21 (specific name of the type species of Geryon Krøyer 1837) (Crustacea, Decapoda). Direction 36

tridens de Haan [1835] [originally in Ocypode (Helice)], in Siebold, Fauna japon. (Crust.): 28, 57 (specific name of the type species of Helice de Haan [1833]) (Crustacea, Decapoda). Direction 36

tridens Koch 1836 [originally in Opilio], Die Arachniden, 3: 14, 15, pl. 78, figs. 173, 173a (specific name of the type species of Oligolophus Koch 1872) (Arachnida). Opinion 942

tridens Hendel 1910 [originally in Urellia], Wiener entomol. Zeitung, 29: 106, 107 (specific name of the type species of Goniurellia Hendel 1927) (Insecta, Diptera). Opinion 1208  

tridentata Forsskål 1775 [originally in Anomia], Descr. Anim.: 124 (valid name at the date of Opinion 883 of the type species of Cavolinia (emendation of Cavolina Abildgaard 1791) (Gastropoda). Opinion 288, Opinion 883  

tridentata Milne Edwards 1853 [originally in Parathelphusa], Ann. Sci. nat., Paris (Zool.), (3)20: 213 (specific name of the type species of Parathelphusa Milne Edwards 1853) (Crustacea, Decapoda). Direction 36

tridentata Miers 1879 [originally in Pseudophilyra], Proc. zool. Soc. London, 1879: 41 (specific name of the type species of Pseudophilyra Miers 1879) (Crustacea, Decapoda). Direction 36 

tridentatus Milne Edwards 1879 [originally in Coenophthalmus], Miss. Sci. Mex., Rech. zool., 5 (fasc. 6): 237, pl. 42, fig. 2 (specific name of the type species of Coenophthalmus Milne Edwards 1879) (Crustacea, Decapoda). Direction 36

Tridentula Bertrand 1763, Dict. Univ. Foss. Propres Foss. Accid., 2: 229 (included in a work rejected for nomenclatural purposes). Opinion 592

Tridiastictopelte Holmberg 1917, Anales del Museo Nacional de Historia Natural de Buenos Aires, 28: 562 (suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy) (Insecta, Hymenoptera). Opinion 2069  

trifasciata Fabricius 1775 [originally in Lamia], Systema Entomologiae, p. 174 (specific name of the type species of Diastocera Dejean 1835) (Insecta, Coleoptera). Opinion 1407

trifasciata Pictet 1832 [originally in Nemoura], Annales des Sciences Naturelles, 26: 379 (specific name of the type species of Brachyptera Newport 1848) (Insecta, Plecoptera). Opinion 1916  

trifida Rambur 1842 [originally in Gynacantha], Histoire naturelle des insectes. Névroptères, p. 210 (specific name of the type species of Triacanthagyna Selys 1883) (Insecta, Odonata). Opinion 2148 

Triglochis Müller & Henle 1837, Arch. Naturgesch., 3(1): 396; Ber. Verh. preuss. Akad. Wiss., 1837: 113 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 723 

trigonalis Martin 1809 [originally in Conchyliolithus Anomites], Petrif. derb.: sign. Q[2], pl. 36, fig. 1, as interpreted by the neotype designated by Muir-Wood 1956 (Ops. Decls. int. Comm. zool. Nomencl., 14: 112, 113) (conserved under the plenary power) (Brachiopoda). Opinion 419  

trigonalis Etheridge 1876 [originally in Myalina], Ann. Mag. nat. Hist., (4)18: 103, pl. 4, fig. 8 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 634

Trigonella Bertrand 1763, Dict. Univ. Foss. Propres Foss. Accid., 2: 229 (included in a work rejected for nomenclatural purposes). Opinion 592

Trigonia Bruguière [1789], Ency. méth., Vers, 1(1): xiv (gender: feminine) (type species, by designation under the plenary power: Venus sulcata Hermann 1781, Der Naturforscher, Halle, 15: 127-129, pl. IV, figs. 9, 10, as interpreted by the lectotype designated by Cox 1951 (Bull. zool. Nomencl., 6: 83)) (Bivalvia). Opinion 327

Trigonigenus [Renier] [1807], [Tav. serv. Class. Conn. Anim.]: Tav. VII (included in a work rejected for nomenclatural purposes). Opinion 427

Trigonodema Laporte 1843, Essai sur le système silurien de LAmérique septentrionale: 27) (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 726 

Trigonograpsus Nicholson 1869, Ann. Mag. nat. Hist., (4)4: 231 (ruled under the plenary power to be an incorrect original spelling for Trigonograptus Nicholson 1869). Opinion 650

Trigonograptus (emendation of Trigonograpsus) Nicholson 1869, Ann. Mag. nat. Hist., (4)4: 231 (conserved under the plenary power) (gender: masculine) (type species, by monotypy: Trigonograpsus [sic] lanceolatus Nicholson 1869, Ann. Mag. nat. Hist., (4)4: 231) (Graptolithina). Opinion 650 

TRIGONOSTOMIDAE Graff 1905, Zeitschrift für Wissenschaftliche Zoologie, 83: 109, type genus Trigonostomum Schmidt 1852 (Platyhelminthes). Opinion 2229

TRIGONOSTOMINA Ohaus 1912, Deutsche Entomologische Zeitschrift, 1912: 151, spelling emended to TRIGONOSTOMUSINA by the ruling under the plenary power that the stem of the generic name Trigonostomus Brenske 1893, is TRIGONOSTOMUS- (Insecta, Coleoptera). Opinion 2229 

Trigonostomum Burmeister 1844, Handbuch der Entomologie, vol. 4(1): 466, suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy (Insecta, Coleoptera). Opinion 2229 

Trigonostomum Schmidt 1852, Sitzungsberichte der kaiserlichen Akademie der Wissenschaften zu Wien, Mathematisch-Naturwissenschaftliche Classe, 9: 500 (gender : neuter ), type species by monotypy Trigonostomum setigerum Schmidt 1852 (Platyhelminthes). Opinion 2229 

Trigonostomus Brenske 1893, Societas Entomologica, 8: 1 (gender: masculine), type species designated under the plenary power Trigonostomum mucoreum Burmeister 1844, ruled under the plenary power to be available from Brenske 1893 and not to be invalid by reason of being an incorrect subsequent spelling of Trigonostomum Burmeister 1844 (Insecta, Coleoptera). Opinion 2229 

TRIGONOSTOMUSINA Ohaus 1912, type genus Trigonostomus Brenske 1893, spelling emended from TRIGONOSTOMINA by the ruling under the plenary power that the stem of the generic name Trigonostomus Brenske 1893, is TRIGONOSTOMUS- (Insecta, Coleoptera). Opinion 2229 

trigonus Houttuyn [1787] [originally in Carabus], Anim. Mus. Houtt. Index: 79 (included in a work suppressed under the plenary power for nomenclatural purposes). Opinion 380 

trigonus Owen 1840 [originally in Ichthyosaurus], Report of the 9th Meeting of the British Association for the Advancement of Science, 1839, 8: 124, as defined by the holotype (specimen no. ANSP 10124 in the Vertebrate Paleontology collection of the Academy of Natural Sciences, Philadelphia, U.S.A., figured by Spamer, Bogan & Torrens 1989, Proceedings of the Academy of Natural Sciences of Philadelphia, 141: 144, pl. 13, figs. 1a-c), it being confirmed by the Commission that Lydekker 1889, did not validly designate a neotype (specific name of the type species of Macropterygius von Huene 1922) (Reptilia, Ichthyopterygia). Opinion 1734

trigonus Siebold 1824 [originally in Palinurus], Hist. nat. Japon.: 15 (specific name of the type species of Linuparus White 1847) (Crustacea, Decapoda). Opinion 519

trilineata Linnaeus 1767 [originally in Musca], Systema Naturae, Ed. 12, vol. 1, part 2, p. 980 (Insecta, Diptera). Opinion 1444

trilineata Retzius 1783 [originally in Phalaena alba] (Arthropoda). ICZN 2014: Opinion 2333

trimaculata Retzius 1783 [originally in Phalaena fusca] (Arthropoda). ICZN 2014: Opinion 2333

trilineatus Wagler 1828 [originally in Atractus], Isis von Oken, 21(7): column 742 (specific name of the type species of Atractus Wagler 182) (Reptilia) Opinion 2210

trilinguis Boddaert 1768 [originally in Madrepora], Lyst der Plant-Dieren, p. 613, pl. 14 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Anthozoa). Opinion 1573 

Triliopelte Holmberg 1917, Anales del Museo Nacional de Historia Natural de Buenos Aires, 28: 561 (suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy) (Insecta, Hymenoptera). Opinion 2069 

trilobata Mocquard 1899 [originally in Rana], Bulletin de la Société Philomatique de Paris, (9)1(4): 158 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Amphibia, Anura). Opinion 1776  

trimacula [Denis & Schiffermüller] 1775 [originally in Phalaena], Ankündung syst. Werkes Schmett. Wien. Gegend: 59 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 494 

trimaculatus Curtis 1834 [originally in Philopotamus], London Edinburgh phil. Mag., (3)4(21): 213 (valid name at the date of Opinion 691 of the type species of Cyrnus Stephens 1836) (Insecta, Trichoptera). Opinion 691

trimeresurus Oken 1816 [originally in Coluber dipsas], Lehrb. Naturgesch., 3: 263 (included in a work rejected for nomenclatural purposes). Opinion 651

Trimononerythros Holmberg 1917, Anales del Museo Nacional de Historia Natural de Buenos Aires, 28: 583 (suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy) (Insecta, Hymenoptera). Opinion 2069  

Trimurus Caldwell 1934, Abstr. Diss. Univ. Cambridge, 1933-1934: 56 (a nomen nudum). Opinion 297 

Trinchesia Ihering 1879, Zool. Anz., 2: 137 (gender: feminine) (type species, by designation by Pruvot- Fol 1954 (Faune de France, 58: 380): Doris caerulea Montagu 1804, Trans. linn. Soc. London, 7: 78) (Gastropoda). Opinion 777  

Tringa Linnaeus 1758, Systema Naturae, Ed. 10, vol. 1, p. 148 (gender: feminine) (type species, by Linnaean tautonymy: Tringa ochropus (emendation of ocrophus) Linnaeus 1758, Systema Naturae, Ed. 10, vol. 1, p. 149) (Aves). Direction 17  

trinitatis Allen & Chapman 1893 [originally in Echimys], Bulletin of the American Museum of Natural History, 5: 223 (specific name of the type species of Proechimys Allen 1899) (Mammalia). Opinion 1984 

Trinoculus Voigt 1836, in Cuvier, Das Thierreich (ed. 2), 4: 275 (a junior objective synonym of Lepidurus Leach 1819). Opinion 502  

Trinomys Thomas 1921, Annals and Magazine of Natural History, (9)8: 140 (gender: masculine) (type species, by original designation: Echimys albispinus Geoffroy Saint-Hilaire 1838) (Mammalia). Opinion 1984

Trinotion Perry 1876, Proc. lit. phil. Soc. Liverpool, 30: lxxxi (an incorrect subsequent spelling for Trinoton Nitzsch 1818). Opinion 629

Trinoton Nitzsch 1818, Mag. Entomol. (Germar), 3: 300 (gender: neuter) (type species, by monotypy: Liotheum (Trinoton) conspurcatum Nitzsch 1818, Mag. Entomol. (Germar), 3: 300, valid name: Pediculus anserinus Fabricius 1805) (Insecta, Mallophaga). Opinion 629

TRINOTONIDAE Eichler 1941, Arch. Naturgesch. (N.F.), 10: 382 (type genus: Trinoton Nitzsch 1818) for use by those who consider that Menopon Nitzsch 1818 and Trinoton Nitzsch 1818 belong to different family-group taxa (Insecta, Mallophaga). Opinion 629

Trinotum Burmeister 1838, Handb. Entomol., 2(2): 440 (an incorrect subsequent spelling for Trinoton Nitzsch 1818). Opinion 629

TRINUCLEEN Emmrich 1844, Naturgesch. Trilobiten: 16 (type genus: Trinucleus Murchison 1839) (a vernacular (German) name). Opinion 505

TRINUCLEIDAE (correction of TRINUCLEIDES) Hawle & Corda 1847, Prodrom Mon. böhm. Trilob.: 36 (also published in 1848 in Abh. Königl.-böhm. Ges. Wiss., (5)5: 152) (type genus: Trinucleus Murchison 1839) (Trilobita). Opinion 505

TRINUCLEIDES Hawle & Corda 1847, Prodrom Mon. böhm. Trilob.: 36 (also published in 1848 in Abh. Königl.-böhm. Ges. Wiss., (5)5: 152) (type genus: Trinucleus Murchison 1839) (an incorrect original spelling for TRINUCLEIDAE Hawle & Corda 1847). Opinion 505 

Trinucleus Link 1807, Beschr. nat.-Samml. Univ. Rostock, 4: 6 (suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy). Opinion 505 

Trinucleus Murchison 1839, Silurian System: 659 (conserved under the plenary power) (gender: masculine) (type species, by designation by Vogdes 1890 (Bull. U.S. geol. Survey, 63: 84): Trinucleus fimbriatus Murchison 1839, Silurian System: 660, as interpreted by the lectotype designated by Stubblefield & Whittington 1956 (Bull. zool. Nomencl., 12: 51)) (Trilobita). Opinion 505

triodona Rafinesque 1814 [originally in Squilla], Précis Découv. Trav. somiolog.: 24 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 522  

Trioeidomera Holmberg 1917, Anales del Museo Nacional de Historia Natural de Buenos Aires, 28: 578 (suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy) (Insecta, Hymenoptera). Opinion 2069  

Triopes Schrank 1803, Fauna boica, 3(1): 251 (an incorrect original spelling for Triops Schrank 1803). Opinion 502

Triops Schrank 1803, Fauna boica, 3(1): 180 (conserved under the plenary power) (gender: masculine) (type species, by designation under the plenary power: Apus cancriformis Bosc [1801-1802], in Castel’s Buffon, Hist. nat. Crust., 2: 244) (Crustacea, Branchiopoda). Opinion 502

TRIOPSIDAE Keilhack 1909, Brauer’s Süsswasserf. Deutschl., 10: 7 (type genus: Triops Schrank 1803) (Crustacea, Branchiopoda). Opinion 502

Trioxocera Pierce 1909, incorrect original spelling of Triozocera Pierce 1908 (Opinion 36)

Triozocera Pierce 1909, emendation of Trioxocera Pierce 1908 (Opinion 36)

triplicatus Pulteney 1813 [originally in Pecten], Cat. Birds, Shells, Dorsetshire (ed. 2): appended to the third edition of Hutchins’ History of Dorset (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 311  

triquetrus Parkinson 1811 [originally in Terebratulites], Organic Remains of a Former World, vol. 3, p. 229, pl. 16 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Brachiopoda). Opinion 1466  

triseriatus Wagler 1830 [originally in Uropsophus], Natürl. Syst. Amph.: 176 (Reptilia). Opinion 366

trisignatus  Förster 1854 [originally in Nematus], Verhandlungen der naturhistorischen Vereines der preussischen Rheinlande und Westfalens (N. F.), 1: 292, specific name of the type species of Pachynematus Konow 1890 (Insecta, Hymenoptera). Opinion 2280

trispinosa Goodsir 1843 [originally in Cuma], Edinburgh New Philosophical Journal, 34: 126 (specific name of the type species of Iphinoe Bate 1856) (Cumacea). Opinion 1593  

trispinosus Stimpson 1860 [originally in Betaeus], Proc. Acad. nat. Sci. Philadelphia, 1860: 32 (specific name of the type species of Alpheopsis Coutière 1897) (Crustacea, Decapoda). Opinion 559

trispinosus Aurivillius 1898 [originally in Palaemonetes], Bihang. K. svensk. Vetensk.-Akad. Handl., Stockholm, 24(4)(1): 29 (specific name of the type species of Desmocaris Sollaud 1911) (Crustacea, Decapoda). Opinion 470

tristero Brower 1996 [originally in Heliconius] (Lepidoptera: NYMPHALIDAE): suppression of Heliconius melpomene bellula Brown 1979 not approved. ICZN 2011: Opinion 2267 (Case 3492)

tristis Dana 1852 [originally in Carpilodes], Proc. Acad. nat. Sci. Philadelphia, 6: 77 (specific name of the type species of Carpilodes Dana 1851) (Crustacea, Decapoda). Direction 36

tristis Girard 1856 [originally in Moniana], Researches upon the cyprinoid fishes inhabiting the fresh waters of the United States, west of the Mississippi Valley, from specimens in the museum of the Smithsonian Institution, p. 37 (first issued as a separate in September 1856; published in the Proceedings of the Academy of Natural Sciences of Philadelphia, 8: 201 in 1857), as defined by the lectotype (specimen no. MNHN 427 in the Muséum National d’Histoire Naturelle, Paris) designated by Mayden & Gilbert 1989, Copeia, 1989(4): 1087 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Osteichthyes, Cypriniformes). Opinion 1821

tristis van der Linden 1829 [originally in Pemphredon], Nouv. Mém. Acad. roy. Sci. Belg., 5: 78 (specific name of the type species of Diodontus Curtis 1834) (Insecta, Hymenoptera). Opinion 844 

Tritaenia Holmberg 1917, Anales del Museo Nacional de Historia Natural de Buenos Aires, 28: 567 (suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy) (Insecta, Hymenoptera). Opinion 2069 

trithrix Gosse 1886 [originally in Eretmia], in Hudson & Gosse, The Rotifera or Wheel Animalcules both British & Foreign, 2: 134, pl. 28, fig. 2 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 816  

tritici Steinbuch 1799 [originally in Vibrio], Der Naturforscher, Halle, 28: 251 (specific name of the type species of Anguina Scopoli 1777) (Nematoda). Opinion 341

Tritoma Fabricius 1775, Systema Entomologiae ..., p. 68 (gender: feminine) (type species, by subsequent designation by Latreille 1810, Considerations générales sur ... les classes des crustacés, des arachnides et des insectes, p. 432: Tritoma bipustulata Fabricius 1775) (Insecta, Coleoptera). Opinion 1754

Tritoma Geoffroy 1762, Histoire abrégée des insectes qui se trouvent aux environs de Paris, vol. 1, p. 335, and all uses of the name prior to the publication of Tritoma Fabricius 1775 (suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy) (Insecta, Coleoptera). Opinion 1754

Tritomacera Costa 1841, Ann. Soc. entomol. France, (1)10: 296, 297 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 680  

Tritomocera Agassiz 1846, Nomencl. zool. Index Univ.: 376 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 680  

Triton Montfort 1810, Conch. Syst. Class. méth. Coquilles, 2: 586 (a junior homonym of Triton Linnaeus 1758). Opinion 886

Tritonalia Fleming 1828, Hist. Brit. Anim.: corrigenda (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 886 

Tritonia Cuvier [1797], Tabl. élém. Hist. nat. Anim.: 387 (gender: feminine) (type species, by designation under the plenary power: Tritonia hombergii Cuvier 1803, Ann. Mus. Hist. nat., Paris, 1: 483) (Gastropoda). Opinion 668

TRITONIADAE Bergh 1884, Semper’s Reis. Philipp., II, Malac. Unters., III (15): 698 (type genus: Tritonia Cuvier [1797]) (an incorrect subsequent spelling for TRITONIIDAE Adams & Adams 1858). Opinion 668

TRITONIIDAE Adams & Adams 1858, Gen. rec. Moll., 2: 62 (type genus: Tritonia Cuvier [1797]) (Gastropoda). Opinion 668  

tritonis Linnaeus 1758 [originally in Murex], Systema Naturae, Ed. 10, vol. 1, p. 754 (specific name of the type species of Charonia Gistl [1847]) (Gastropoda). Opinion 886

Tritropis Fitzinger 1843, Syst. Rept.: 59 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 955  

trituberculata Retzius 1783 [originally in Phalaena ziczac] (Arthropoda). ICZN 2014: Opinion 2333

trivirgatus Gray 1832 [originally in Paradoxurus], Proc. zool. Soc. London, 2: 68 (specific name of the type species of Arctogalidia Merriam 1897) (Mammalia). Opinion 384

trivittata Steindachner 1902 [originally in Beanea], Anzeiger der Akademie der Wissenschaften, Wien, 39: 337 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Osteichthyes, Perciformes). Opinion 1481 

Trochigenus [Renier] [1807], [Tav. serv. Class. Conn. Anim.]: Tav. VIII (included in a work rejected for nomenclatural purposes). Opinion 427

Trochocochlea Mörch 1852, Catalogus conchyliorum quae reliquit D. Alphonso d’Aguirra & Gadea Comes de Yoldi ..., part 1, p. 154 (a junior objective synonym of Osilinus Philippi 1847) (Gastropoda). Opinion 1930  

TROCHULINAE Lindholm 1927, Archiv für Molluskenkunde, 59(2): 122 (type genus: Trochulus Chemnitz 1786) (Gastropoda). Opinion 2079 

Trochulus Chemnitz 1786, Neues Systematisches Conchylien-Cabinet, vol. 9, part 2, p. 52 (gender: masculine) (type species, by monotypy: Helix hispida Linnaeus 1758) (Gastropoda). Opinion 2079 

Troglocaris Dormitzer 1853, Lotos, 3: 85 (gender: feminine) (type species, by monotypy: Troglocaris schmidti Dormitzer 1853, Lotos, 3: 85, valid name: Palaemon anophthalmus Kollar 1848) (Crustacea, Decapoda). Opinion 470

troglodyta Fabricius 1787 [originally in Sirex], Mantissa Insectorum, sistens corum species nuper detectas: adjectis characteribus genericis, differentiis specificis, emendationibus, observationibus, vol. 1. xx, Christ. Gottl. Proft., Hafniæ, p. 258–259, (specific name of the type species of Astatus Panzer [1801]). (Insecta, Hymenoptera). Opinion 2306  

Troglodytes Vieillot [1809], Histoire naturelle des oiseaux de l’Amérique septentrionale ..., vol. 2, p. 52 (gender: masculine) (type species, by subsequent designation by Baird 1858, Pacific Railroad Reports. Reports of Explorations and Surveys for a Railroad from the Mississippi River to the Pacific Ocean, 1853- 6, 9(2): 366: Troglodytes aedon Vieillot [1809]) (Aves, Passeriformes). Opinion 1893 

troglodytes Blumenbach 1775 [originally in Simia], De generis humani varietate nativa, p. 37 (specific name of the type species of Pan Oken 1816) (Mammalia). Opinion 1368.  

Trombidium Fabricius 1775, Syst. Entomol.: 430 (gender: neuter) (type species, by designation by Latreille 1810 (Consid. gén. Anim. Crust. Arach. Ins.: 425, 131): Acarus holosericeus Linnaeus 1758, Systema Naturae, Ed. 10, vol. 1, p. 617) (Arachnida). Opinion 104. Corrigenda in Bulletin of Zoological Nomenclature, 45: 304 Trombidion Agassiz 1845, Nomencl. zool. (Arach.): 13 (an unjustified emendation of Trombidium Fabricius 1775). Direction 66 

trompe Modeer 1786 [originally in Oestrus], K. Vetensk.-Akad. Nya Handl., Stockholm, 7: 134 (specific name of the type species of Cephenemyia Latreille 1818) (Insecta, Diptera). Direction 64

Trophon Montfort 1810, Conch. syst. Class. méth. Coquilles, 2: 482 (gender: masculine) (type species, by original designation: Murex magellanicus Gmelin 1791, in Linnaeus, Systema Naturae, Ed. 13, vol. 1, part 66, p. 3548, valid name: Buccinum geversianum Pallas 1774) (Gastropoda). Opinion 911  

tropica Koch 1899 [originally in Plasmodium] (a name erroneously alleged by subsequent workers to have been made available). Opinion 283

tropicalis Blow & Banner 1962 [originally in Globigerina], in Eames et al., Fundamentals of mid-Tertiary Stratigraphic correlation: 124 (Rhizopoda). Opinion 1316

tropicalis Boisduval 1847 [originally in Tingra], in Delegorgue, Voy. Afrique austr., 2: 589 (specific name of the type species of Pentila Westwood [1851]) (Insecta, Lepidoptera). Opinion 566  

Tropidogaster Duméril & Bibron 1837, Erpét. gén., 4: 329 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 955 

Tropidolaemus Wagler 1830 (Reptilia). ICZN 2014: Opinion 2350

Tropidoptera Ancey 1889, Bulletin de la Société Malacologique de France, 6: 191 (gender: feminine) (type species, by designation under the plenary power: Endodonta wesleyi Sykes 1896) (Gastropoda). Opinion 1845  

Tropiphorus Schönherr 1842, Synonymia Insectorum. Genera et Species Curculionidum, p. 257 (gender: masculine) (type species, by original designation: Curculio mercurialis Fabricius 1801) (Insecta, Coleoptera). Opinion 1474  

Tropisurus Diesing 1835, Oesterr. Med. Jahr., 16: 83 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 892 

tros Fabricius 1793 [originally in Papilio], Entomol. syst., 3: 10 (Insecta, Lepidoptera). Opinion 620  

trossingensis Fraas 1913 [originally in Plateosaurus] (Dinosauria). ICZN 2019: Opinion 2435

trotommidens Pic 1892 [originally in Anthicus] (Coleoptera). ICZN 2016: Opinion 2377

truncata Adams 1800 [originally in Bulla], Trans. linn. Soc. London, 5: 1 (a junior primary homonym of truncata Gmelin [1791] [originally in Bulla], and a junior objective synonym of truncatula Bruguière [1792] [originally in Bulla]). Opinion 549  

truncata Linnaeus 1758 [originally in Mya], Systema Naturae, Ed. 10, vol. 1, p. 670 (specific name of the type species of Mya Linnaeus 1758) (Bivalvia). Direction 73

truncata Linnaeus 1767 [originally in Tellina], Systema Naturae, Ed. 12, vol. 1, part 2, p. 1118 (Bivalvia). Opinion 910

Truncatella Risso 1826, Hist. nat. princip. Prod. Europ. mérid., 4: 124) (gender: feminine) (type species, by subsequent designation by Lowe 1855 (Proceedings of the Zoological Society of London, 22: 217): Truncatella costulata Risso 1826, a junior subjective synonym of Helix subcylindrica Linnaeus 1767) (Gastropoda). Opinion 344, Opinion 1664 

truncatella Müller 1773 [originally in Bursaria], Verm. terrestr. fluviat. Hist., 1(1): 62 (specific name of the type species of Bursaria Müller 1773) (Ciliophora). Direction 77

TRUNCATELLIDAE Gray 1840, Syn. Contents Brit. Mus. (ed. 42): 117 (type genus: Truncatella Risso 1826), ruled under the plenary power that this name and other family-group names based on Truncatella Risso 1826 are not to be given priority over RISSOIDAE Gray 1847 and other family-group names based on Rissoa Desmarest 1814 whenever their type genera are placed in the same family-group taxon (Gastropoda). Opinion 344, Opinion 1664

Truncatellina Lowe 1852, Ann. Mag. nat. Hist., (2)9: 275 (gender: feminine) (type species, by monotypy: Pupa (Truncatellina) linearis Lowe 1852, Ann. Mag. nat. Hist., (2)9: 275) (Gastropoda). Opinion 335  

truncatula Bruguière [1792] [originally in Bulla], Ency. méth., Vers, 1: 377, as interpreted, by direction under the plenary power, by reference to the holotype of Bulla truncata Adams 1800 (Trans. linn. Soc. London, 5: 1) (Gastropoda). Opinion 549

Truncatuliana Servain 1881, Histoire malacologique du lac Balaton en Hongrie, p. 63 (a junior objective synonym of Galba Schrank 1803) (Gastropoda). Opinion 1896

truncatulum Müller 1774 [originally in Buccinum], Vermium terrestrium et fluviatilium, seu animalium infusoriorum, helminthicorum et testaceorum, non marinorum, succincta historia, vol. 2, p. 130 (specific name of the type species of Galba Schrank 1803) (Gastropoda). Opinion 336, Opinion 1896 

truncatus Dana 1852 [originally in Betaeus], Proc. Acad. nat. Sci. Philadelphia, 6: 23 (specific name of the type species of Betaeus Dana 1852) (Crustacea, Decapoda). Opinion 470  

truncatus Montagu 1821 [originally in Delphinus], Memoirs of the Wernerian Natural History Society, 3: 75, pl. 3 (Mammalia, Cetacea). Opinion 1413

truncatus Stimpson 1860 [originally in Metopocarcinus], Ann. Lyceum nat. Hist. New York, 7: 216 (specific name of the type species of Metopocarcinus Stimpson 1860) (Crustacea, Decapoda). Direction 36 

truncatus Milne Edwards 1880 [originally in Palinustus], Bull. Mus. comp. Zool., 8: 66 (specific name of the type species of Palinustus Milne Edwards 1880) (Crustacea, Decapoda). Opinion 519

Trunculariopsis Cossmann 1921, Revue crit. Paléozool., 25: 79 (gender: feminine) (type species, by monotypy: Murex trunculus Linnaeus 1758, Systema Naturae, Ed. 10, vol. 1, p. 747) (Gastropoda). Opinion 911  

trunculatus Rafinesque 1817 [originally in Pagurus], Amer. mon. Mag., 2: 42 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 522  

trunculus Linnaeus 1758 [originally in Murex], Systema Naturae, Ed. 10, vol. 1, p. 747 (specific name of the type species of Trunculariopsis Cossmann 1921) (Gastropoda). Opinion 911

trutta Linnaeus 1758 [originally in Salmo] given precedence over eriox Linneaus 1758 [Salmo], whenever the two are considered synonymous (Opinion 40)

Trychosis Foerster 1868, Verh. naturh. Ver. preuss. Rheinl., 25: 187 (gender: feminine) (type species, by designation under the plenary power: Cryptus ambiguus Tschek 1870, Verh. zool.-bot. Ges. Wien, 20: 145) (Insecta, Hymenoptera). Opinion 1017

Trypanosoma Gruby 1843 (November), C.R. Acad. Sci., Paris, 17: 1134 (gender: neuter) (type species, by monotypy: Trypanosoma sanguinis Gruby 1843 (November), C.R. Acad. Sci., Paris, 17: 1134, valid name: Amoeba rotatoria Mayer 1843) (Mastigophora). Opinion 95, Direction 76  

Trypetes Schoenherr 1836, Gen. et Sp. Curc., III(2): 595 (gender: masculine) (type species, by original designation: Trypetes rhinoides Gyllenhal 1836, in Schoenherr, Gen. et Sp. Curc., III(2): 596) (Insecta, Coleoptera). Opinion 1005  

TRYPETIDINAE Pierce 1919, Proc. Entomol. Soc. Washington, 21: 33 (type genus: Trypetes Schoenherr 1836) (Insecta, Coleoptera). Opinion 1005