International Commission on Zoological Nomenclature:
OPINIONS and DIRECTIONS
International Commission on Zoological Nomenclature:
OPINIONS and DIRECTIONS
taxa names:
Or
oraniensis Lepeletier de Saint Fargeau 1841 [originally in Ancyla], Histoire Naturelle des Insectes–Hyménoptères [vol. 2], p. 294 (specific name of the type species of Ancyla Lepeletier de Saint Fargeau 1841) (Insecta, Hymenoptera). Opinion 2246
oratoria Fallén 1815 [originally in Tachydromia] (Diptera). ICZN 2014: Opinion 2347
orbata Wiedemann 1830 [originally in Tachina], Aussereuropäische zweiflügelige Insekten, 2: 336, ruled by the Commission to be as defined by the neotype designated by Crosskey 1967, Proceedings of the Royal Entomological Society of London, (B)36: 106 (Insecta, Diptera). Opinion 1600
Orbicula Cuvier 1798, Tableau élémentaire de l’histoire naturelle des animaux, p. 435 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Brachiopoda). Opinion 1468
orbicularis da Costa 1778 [originally in Glycymeris], British Conchology, p. 168 (a junior objective synonym of the specific name of Arca glycymeris Linnaeus 1758) (Bivalvia). Opinion 1414
orbicularis Linnaeus 1758 [originally in Lacerta], Systema Naturae, Ed. 10, vol. 1, p. 206, as interpreted by the lectotype designated by Smith 1957 (Bull. zool. Nomencl., 13: 268) (specific name of the type species of Phrynosoma Wiegmann 1828) (Reptilia). Opinion 565
orbicularis Linnaeus 1758 [originally in Testudo], Systema Naturae, Ed. 10, vol. 1, p. 198 (senior subjective synonym of the specific name of Testudo lutaria Linnaeus 1758, the type species of Emys Duméril 1806, by the first reviser action of Mertens & Wermuth 1960, Die Amphibien und Reptilien Europas, p. 12) (Reptilia, Testudines). Opinion 1800
orbiculata Gyllenhal 1808 [originally in Nitidula], Insecta Svecica, Descripta a Leonardo Gyllenhal, Classis I. Coleoptera sive Eleuterata, vol. 1, p. 242 (specific name of the type species of Aspidiphorus Ziegler in Dejean 1821) (Insecta, Coleoptera). Opinion 1862
orbiculata Fabricius 1775 [originally in Pimelia], Systema entomologiae, sistens insectorum classes, ordines, genera, species, adiectis synonymis, locis, descriptionibus, observationibus, p. 253 (specific name of the type species of Tentyrina Reitter 1900) (Insecta, Coleoptera). Opinion 2244
Orbiculigenus [Renier] [1807], [Tav. serv. Class. Conn. Anim.]: Tav. VII (included in a work rejected for nomenclatural purposes). Opinion 427
Orbiculoidea d’Orbigny 1847, C.R. Acad. Sci., Paris, 25: 269 (gender: masculine) (type species, by designation under the plenary power: Orbicula forbesii Davidson 1848, Bull. Soc. géol. France, (2)5: 334) (Brachiopoda). Opinion 722
ORBICULOIDEINAE Schuchert & LeVene 1929, Brachiop., Fossilium Catalogus, I Animalia (42): 13 (type genus: Orbiculoidea d’Orbigny 1847) (Brachiopoda). Opinion 722
orbiculus Forsskål 1775 [originally in Nautilus], Descriptiones animalium ..., p. 125 (specific name of the type species of Sorites Ehrenberg [1839]) (Foraminiferida). Opinion 1536
orbignyi Buckman 1908 [originally in Normannites], Ann. Mag. nat. Hist., (8)1: 146 (specific name of the type species of Normannites Munier-Chalmas 1892) (Cephalopoda). Opinion 309
orbignyi Milne Edwards & Lucas [1844] [originally in Xantho], in d’Orbigny, Voy. Amér. mérid., 6 (Crust.): 14, pl. 7 (specific name of the type species of Platyxanthus Milne Edwards 1863) (Crustacea, Decapoda). Direction 36
orbis Bloch 1787 [originally in Chaetodon], Naturgeschichte der Ausländischen Fische. Dritter Theil. xii, p. 81, pl. 202, fig. 2, specific name of the type species of Ephippus Cuvier 1816 (Osteichthyes). Opinion 2302
orbitalis Fӧrster 1856 [Teleogmus] [originally in ], specific name of the type species by original designation of Teleogmus Fӧrster 1856) (Opinion 43)
Orbitolina d’Orbigny 1850, Prodrome de Paléontologie stratigraphique universelle des animaux mollusques & rayonnés faisant suite au cours élémentaire de Paléontologie et Géologie stratigraphiques, vol. 2, p. 143 (gender: feminine) (type species, ruled under the plenary power to be by subsequent designation by Davies 1939, Transactions of the Royal Society of Edinburgh, 59: 786: Orbulites concava Lamarck 1816) (Foraminiferida). Opinion 1587
Orbulina d’Orbigny 1839, in R. de la Sagra, Hist. phys. pol. nat. Ile de Cuba: 2 (gender: feminine) (type species, by monotypy: Orbulina universa d’Orbigny 1839, in R. de la Sagra, Hist. phys. pol. nat. Ile de Cuba: 3) (Rhizopoda). Opinion 552
ORBULINIDA Schultze 1854, Ueber Organ. d. Polythalamien: 52 (type genus: Orbulina d’Orbigny 1839) (an incorrect original spelling for ORBULINIDAE Schultze 1854). Opinion 552
ORBULINIDAE (correction by Galloway 1933, of ORBULINIDA) Schultze 1854, Ueber Organ. d. Polythalamien: 52 (type genus: Orbulina d’Orbigny 1839) for use by those who consider that Orbulina d’Orbigny and Globigerina d’Orbigny 1826 belong to different family-group taxa (Rhizopoda). Opinion 552
Orbulites Lamarck 1801, Syst. Anim. sans Vertèbr.: 100 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 304
Orchelimum Audinet-Serville 1838, Hist. nat. Ins. Orth.: 522 (gender: neuter) (type species, by designation by Kirby 1906 (Syn. Cat. Orth. II, Orth. Salt., 1: 273): Orchelimum cuticulare Audinet-Serville 1838, Hist. nat. Ins. Orth.: 523, 524, valid name: Orchelimum vulgare Harris 1841) (Insecta, Orthoptera). Opinion 1148
Orchesella Templeton 1835, Trans. entomol. Soc. London, 1(2): 92 (gender: feminine) (type species, by designation by Börner 1903 (SitzBer. Ges. naturf. Freunde Berlin, 1903: 180): Podura cincta Linnaeus 1758, Systema Naturae, Ed. 10, vol. 1, p. 609) (Insecta, Collembola). Opinion 291
Orchestes Illiger 1798 (Coleoptera). ICZN 2021: Opinion 2482
Orchestia Leach 1814, in Brewster’s Edinburgh Encycl., 7: 402, 432 (gender: feminine) (type species, by monotypy: Cancer (Gammarus) littoreus Montagu 1808, Trans. linn. Soc. London, 9: 96, valid name: Oniscus gammarellus Pallas 1766) (Crustacea, Amphipoda). Opinion 1133
ORCHESTIIDAE (correction of ORCHESTIDAE) Leach 1814, in Brewster’s Edinburgh Ency., 7: 432 (type genus: Orchestia Leach 1814) ruled under the plenary power not to be given priority over TALITRIDAE Rafinesque 1815 whenever Orchestia Leach and Talitrus Bosc [1802] are placed in the same family-group taxon (Crustacea, Amphipoda). Opinion 1133
Orconectes Cope 1872, Amer. Nat., 6: 409, 410, 416, 417, 419 (gender: masculine) (type species, by designation by Fowler 1912 (Ann. Rep. New Jersey State Mus., 1911: 339): Orconectes inermis Cope 1872, Amer. Nat., 6: 409, 410, 419, valid name: Astacus pellucidus Tellkampf 1844) (Crustacea, Decapoda). Opinion 519
Oreas Agassiz 1846 Nomencl. zool. Index Univ. (a junior homonym of Oreas Hübner [1807]). Opinion 789
Oreas Desmarest 1822, Ency. méth. (Mamm.), 2: 471 (a junior homonym of Oreas Hübner [1807]). Opinion 789
Oreas Hübner [1806], Tentamen: [1] (included in a work rejected for nomenclatural purposes). Opinion 278
Oreas Hübner [1807], Samml. exot. Schmett., 1: pl. [82] (a junior objective synonym of Haetera Fabricius 1807). Opinion 789
Oreas Hübner 1808, Erste Zutr. Samml. exot. Schmett.: 3 (included in a work rejected for nomenclatural purposes). Opinion 789
Oreas Montfort 1808, Conch. syst. Class. méth. Coquilles, 1: 94 (a junior homonym of Oreas Hübner [1807]). Opinion 789
oreganus Randall 1840 [originally in Astacus], J. Acad. nat. Sci. Philadelphia, 3(1): 138 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 855
Oreophorus Rüppell 1830, Beschr. Krabben rothen Meeres: 18 (gender: masculine) (type species, by monotypy: Oreophorus horridus Rüppell 1830, Beschr. Krabben rothen Meeres: 19) (Crustacea, Decapoda). Opinion 73
Oreophryne Boettger 1895, Zool. Anz., 18(472): 135 (gender: feminine) (type species, by monotypy: Oreophryne senckenbergiana Boettger 1895, Zool. Anz., 18(472): 135, valid name: Microhyla achatina moluccensis Peters & Doria 1878 ) (Amphibia). Opinion 1266
orestes Billings 1860 [originally in Phacops], Canadian Naturalist and Geologist, 5: 65 (specific name of the type species of Acernaspis Campbell 1967) (Trilobita). Opinion 1846
Orgyia Ochsenheimer 1810, Schmett. Europas, 3: 208 (gender: feminine) (type species, by designation by Curtis 1831 (British Entomol., 8: 378): Phalaena antiqua Linnaeus 1758, Systema Naturae, Ed. 10, vol. 1, p. 503) (Insecta, Lepidoptera). Opinion 1283
ORGYIIDAE Wallengren 1861, K. Svenska Fregattes Eugenies Resa. C.A. Virgin åren, 1851-1853, (Zool.), 1 (10, Lepidoptera): 369 (type genus: Orgyia Ochsenheimer 1810) ruled under the plenary power not to be given priority over LYMANTRIIDAE Hampson [1893] whenever Orgyia Ochsenheimer 1810 and Lymantria Hübner [1819] are placed in the same family-group taxon (Insecta, Lepidoptera). Opinion 1283
orientalis Bremer 1864 [originally in Anthocharis belemida, var.], Mém. Acad. imp. Sci. St. Pétersbourg, (7)8: 8 (without prejudice to the prior rights of the nominal species Anthocharis creusa Doubleday [1847], if that name is considered to be conspecific with orientalis Bremer) (Insecta, Lepidoptera). Opinion 270
orientalis Linnaeus 1758 [originally in Blatta], Systema Naturae, Ed. 10, vol. 1, p. 424 (specific name of the type species of Blatta Linnaeus 1758) (Insecta, Orthoptera). Direction 64
orientalis Miers 1886 [originally in Lupocyclus (Parathranites)], Rep. Voy. ‘Challenger’ (Zool.), 17 (No. 2):
orientalis Stimpson 1860 [originally in Ogyris], Proc. Acad. nat. Sci. Philadelphia, 1860: 36 (specific name of the type species of Ogyrides Stebbing 1914) (Crustacea, Decapoda). Opinion 470
orientalis Gmelin 1774 [originally in Ovis], Reise durch Russland zur Untersuchung der drey Natur-Reiche, vol. 3, pp. 432, 486, ruled under the plenary power to be not invalid by reason of being pre-dated by a name based on a domestic form (Mammalia). Opinion 2027
orientalis Lund 1793 [originally in Scyllarus], Skr. naturh. Selsk. Kbh., 2(2): 22 (valid name at the date of Opinion 519 of the type species of Thenus Leach 1815) (Crustacea, Decapoda). Opinion 519
Oriolus Brisson 1760, Ornithologia, 2: 320-333 (suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy). Direction 21
Oriolus Linnaeus 1766, Systema Naturae, Ed. 12, vol. 1, part 1, p. 160 (conserved under the plenary power) (gender: masculine) (type species, by absolute tautonymy and through Opinion 67 and Article 67e (1961 Code): Coracias oriolus Linnaeus 1758, Systema Naturae, Ed. 10, vol. 1, p. 107) (Aves). Opinion 67, Direction 21, Direction 43
oriolus Linnaeus 1758 [originally in Coracias], Systema Naturae, Ed. 10, vol. 1, p. 107 (specific name of the type species of Oriolus Linnaeus 1766) (Aves). Direction 43
Ormenoflata Melichar 1923, in Wytsman, Gen. Ins. (182): 67 (gender: feminine) (type species, by original designation: Poeciloptera pulverulenta Guérin 1844, Icon. Règne Anim. Ins.: 361) (Insecta, Hemiptera). Opinion 598
ornata Randall 1840 [originally in Ilia], J. Acad. nat. Sci. Philadelphia, 8: 129 (specific name of the type species of Randallia Stimpson 1857) (Crustacea, Decapoda). Direction 36
ornata Sparrman 1789 [originally in Tanagra], Mus. Carls. (4): pl. 95 (valid name at the date of Opinion 852 of the type species of Thraupis Boie 1826) (Aves). Opinion 852
ornata Gray 1843 [originally in Tiliqua], Descriptions of the Reptiles and Amphibia hitherto observed in New Zealand. In Dieffenbach, E. (Ed.), Travels in New Zealand with contributions to the geography, geology, botany and natural history of that country. John Murray, p. 202, as defined by the neotype designated under the Plenary Power (specimen NMNZ RE.002457 (formerly NMNZ R.1815 and EDS.912) in the Museum of New Zealand Te Papa Tongarewa, Wellington, collected at Manakau, Horowhenua, by A.H. Whitaker on 7 September 1971) (Reptilia, Squamata). Opinion 2313
Ornatilepisma Irish 1988 (Zygentoma). ICZN 2018: Opinion 2427
ornatus Pocock 1902 [originally in Centruroides], Biologia Centrali-Americana, p. 26 (Arachnida, Scorpiones). Opinion 1394
ornatus Geoffroy Saint-Hilaire 1809 [originally in Cephalopterus], Ann. Mus. Hist. nat., Paris, 13(75): 238 (specific name of the type species of Cephalopterus Geoffroy Saint-Hilaire 1809) (Aves). Direction 43
ornatus Dana 1852 [originally in Cyclodius], Proc. Acad. nat. Sci. Philadelphia, 6: 80 (specific name of the type species of Cyclodius Dana 1851) (Crustacea, Decapoda). Direction 36
ornatus Dana 1852 [originally in Medaeus], Proc. Acad. nat. Sci. Philadelphia, 6: 76 (specific name of the type species of Medaeus Dana 1851) (Crustacea, Decapoda). Opinion 712
ornatus Houttuyn [1787] [originally in Tetrodon], Anim. Mus. Houtt. Index: 32 (included in a work suppressed under the plenary power for nomenclatural purposes). Opinion 380
ornatus Leidy 1872 [originally in Tylosteus], Proceedings of the Academy of Natural Sciences of Philadelphia, 1872: 40 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Reptilia, Dinosauria). Opinion 1371
Orneodes Latreille 1796, Précis Caract. Ins.: 148 (a junior objective synonym of Alucita Linnaeus 1758). Opinion 450
ORNEODIDAE (correction by Meyrick 1895 (Handb. brit. Lep.: 441) of ORNEODIDES) Herrich-Schaeffer, [1843], Syst. Bearbeit. Schmett. Europ., 1: 14 (type genus: Orneodes Latreille 1796) (a junior objective synonym of ALUCITIDAE (correction of ALUCITIDES) [Leach 1815], the respective type genera of the two families having the same nominal species as type species). Opinion 450
ORNEODIDES Herrich-Schaeffer, [1843], Syst. Bearbeit. Schmett. Europ., 1: 14 (type genus: Orneodes Latreille 1796) (an incorrect original spelling for ORNEODIDAE Herrich-Schaeffer [1843]). Opinion 450
orni Linnaeus 1758 [originally in Cicada] (Hemiptera). ICZN 2021: Opinion 2475
ornigis Weed 1887 [originally in Apanteles], Bulletin of the Illinois State Laboratory of Natural History, 3: 6, ruled under the plenary power to be given precedence over the specific name of Microgaster robiniae Fitch 1859 whenever the two names are considered to be synonyms (specific name of the type species of Pholetesor Mason 1981) (Insecta, Hymenoptera). Opinion 1480
Ornipholidotos Bethune Baker 1914, Trans. entomol. Soc. London, 1914: 319 (gender: masculine) (type species, by designation under the plenary power: Pentila kirbyi Aurivillius 1895, Entomol. Tidskr., 16: 198) (Insecta, Lepidoptera). Opinion 814
Ornitoglossum Bertrand 1763, Dict. Univ. Foss. Propres Foss. Accid., 2: 87 (included in a work rejected for nomenclatural purposes). Opinion 592
Orobothriurus Maury 1976, Revista Peruana de Entomología, 18: 14 (gender: masculine) (type species, by original designation: Bothriurus alticola Pocock 1899) (Arachnida). Opinion 2074
Orosagrotis Hampson 1903, Cat. Lep. Phal. Brit. Mus., 4: 133 (gender: feminine) (type species, by original designation: Agrotis montana Morrison 1875, Ann. Lyc. nat. Hist. N.Y., 11: 95) (Insecta, Lepidoptera). Opinion 983
Orpheides Hübner [1819], Verz. bekannt. Schmett. (6): 86 (a junior objective synonym of Princeps Hübner [1807]). Opinion 270
Orphnaeus Meinert 1870, Naturhistorisk Tidsskrift, (3)7: 17 (gender: masculine) (type species, by subsequent designation by Crabill 1968, Entomological News, 79: 109: Orphnaeus lividus Meinert 1870, a junior subjective synonym of Geophilus brevilabiatus Newport 1845) (Chilopoda). Opinion 2071
Orphnoxanthus Alcock 1898, J. asiat. Soc. Bengal, 67(2): 127 (gender: masculine) (type species, by monotypy: Xanthodes microps Alcock & Anderson 1894, J. asiat. Soc. Bengal, 63(2): 183) (Crustacea, Decapoda). Opinion 85, Direction 37
Orsodacne Latreille 1802, Histoire naturelle, générale et particulière des crustacés et des insectes, vol. 3, p. 223 (gender: feminine) (type species, by designation under the plenary power: Chrysomela cerasi Linnaeus 1758) (Insecta, Coleoptera). Opinion 1989
Ortalidae Fallén 1810 (Diptera). ICZN 2020: Opinion 2456
Ortalidaini Donegan 2012 (Aves). ICZN 2020: Opinion 2456
Ortalididae Fallén 1810 (Diptera). ICZN 2020: Opinion 2456
Ortalidini Donegan 2012 (Aves). ICZN 2020: Opinion 2456
Ortalis Merrem 1786 (Aves). ICZN 2020: Opinion 2456
Ortalisini Acloque 1897 (Diptera). ICZN 2020: Opinion 2456
Ortalisini David 2014 (Aves). ICZN 2020: Opinion 2456
Orthezia [Bosc d’Antic], 1784 (Hemiptera). ICZN 2016: Opinion 2387
Orthezia-Characias [Bosc d’Antic], 1784 (Hemiptera). ICZN 2016: Opinion 2387
Orthocera Blainville 1828, Dict. Sci. nat., 36: 485 (a junior homonym of Orthocera Modeer 1789). Opinion 1003
Orthocera Fleming 1815, Ann. Phil., 5: 201-206 (a junior homonym of Orthocera Modeer 1789). Opinion 1003
Orthocera Lamarck 1799, Mém. Soc. Hist. nat. Paris, 1: 80 (a junior homonym of Orthocera Modeer 1789). Opinion 1003
Orthocera Modeer 1789, Illust. quaedam in R.D. Ambr. Soldani opus egreg. Saggio Orittograffico dictum, first published as a part of Testaceogr. ac Zoophytogr. parvae et microsc. tomus primus: 41-43 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 1003
Orthocera Sowerby 1812, Min. Conch., 1: 127 (a junior homonym of Orthocera Modeer 1789). Opinion 1003
Orthoceras Balashov 1956, emendation pro Orthoceros Brünnich 1771, Ezheg. vses. paleont. Obshch., 15: 233 (a junior homonym of Orthoceras Bruguière 1789). Opinion 1003
Orthoceras Batsch 1791, Sechs Kupfertafeln mit Conchylien des Seesandes: (no page nos.) (a junior homonym of Orthoceras Bruguière 1789). Opinion 1003
Orthoceras Blainville 1825, Man. Malac.: 379 (a junior homonym of Orthoceras Bruguière 1789). Opinion 1003
Orthoceras Bruguière 1789, Ency. méth., Hist. nat. Vers (1): xvi (gender: neuter) (type species, by designation by Miller, Dunbar & Condra 1933 (Bull. Nebraska Geol. Surv., (2)9: 61, 62): Orthoceratites regularis Schlotheim 1820, Die Petref.: 54) (Cephalopoda). Opinion 1003
Orthoceras Deshayes 1831, Descr. Coquilles caract. Terrains: 215 (a junior homonym of Orthoceras Bruguière 1789). Opinion 1003
Orthoceras Perry 1811, Conch. nat. Hist. Shells: pl. LII (a junior homonym of Orthoceras Bruguière 1789). Opinion 1003
Orthoceras Phillips 1836, Ill. Geol. Yorks: 237 (a junior homonym of Orthoceras Bruguière 1789). Opinion 1003
Orthoceras Schrank 1796, Samml. Nat. Phys. Aufsatz: 131 (a junior homonym of Orthoceras Bruguière 1789). Opinion 1003
Orthoceras Spalovsky 1795, Prodromus in Syst. Nat. Hist. Test.: 10 (a junior homonym of Orthoceras Bruguière 1789). Opinion 1003
Orthocerata Soldani 1780, Saggio Orittografico, ovvero osservazioni sopra le terre nautilitiche ed ammonitiche della Toscana: 106 (included in a non-binominal work by a non-binominal author). Opinion 1003
Orthoceratia Soldani 1791, Testaceographiae ac Zoophytographiae parvae et microscopicae tomus primus (2): 91 (included in a non-binominal work by a non-binominal author). Opinion 1003
ORTHOCERATIDAE McCoy 1844, A synopsis of the characters of the Carboniferous Limestone fossils of Ireland (London): 6 (type genus: Orthoceras Bruguière 1789) (Cephalopoda). Opinion 1003
Orthoceratites Lamarck 1799, Mém. Soc. Hist. nat. Paris, 1: 81 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 613
ORTHOCERINI Blanchard 1845 (1820), Histoire des insectes.. comprenant une nouvelle classification fondée sur leurs rapports naturels, vol. 2, p. 29 (type genus: Orthocerus Latreille 1796), ruled under the plenary power that this name and other family-group names based on Orthocerus are not to be given priority over COLYDIIDAE Erichson 1842 and other familygroup names based on Colydium Fabricius 1792 whenever their type genera are placed in the same family-group taxon (Insecta, Coleoptera). Opinion 1811
Orthoceros Brünnich [1771], Zoologiae Fundamenta: 232, 246 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy). Opinion 1003
ORTHOCEROTIDAE Teichert & Miller 1936, in Kindle & Miller, Geol. Soc. America Special Paper, 23: 1 (type genus: Orthoceros Brünnich [1771]) (invalid because the name of the type genus has been suppressed under the plenary power). Opinion 1003
Orthocerus Latreille 1796, Précis des caractères génériques des insectes, disposés dans un ordre naturel, p. 16 (gender: masculine) (type species, by subsequent monotypy by Latreille 1807, Genera Crustaceorum et Insectorum, vol. 2, p. 172: Tenebrio hirticornis De Geer 1775, a junior subjective synonym of Dermestes clavicornis Linnaeus 1758) (Insecta, Coleoptera). Opinion 1811
ORTHOCLADIINAE Kieffer 1911, Records of the Indian Museum, 6: 345 (type genus Orthocladius van der Wulp 1874), ruled under the plenary power (with other family-group names based on Orthocladius) to be given precedence over ERETMOPTERINAE Kellogg 1900 and other family-group names based on Eretmoptera Kellogg 1900, and over CLUNIONINAE Kieffer 1906 and other family-group names based on Clunio Haliday 1855, whenever the respective type genera are placed in the same family-group taxon (Diptera) Opinion 2206.
Orthocladius van der Wulp 1874, Tijdschrift voor Entomologie, 16: 132 (gender: masculine), type species Chironomus oblidens Walker 1856 (Diptera) Opinion 2206.
Orthocolobos Holmberg 1917, Anales del Museo Nacional de Historia Natural de Buenos Aires, 28: 558 (suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy) (Insecta, Hymenoptera). Opinion 2069
Orthonus Miers [1878], Proceedings of the Zoological Society of London, 1877(43): 664 (a junior objective synonym of Armadillo Latreille 1802) (Isopoda). Opinion 1897
Orthoptyche Holmberg 1917, Anales del Museo Nacional de Historia Natural de Buenos Aires, 28: 559 (suppressed under the plenary power for the purposes of both the Principle of Priority and the Principle of Homonymy) (Insecta, Hymenoptera). Opinion 2069
orthorhynchus White 1847 [originally in Lebbeus], List Crust. Coll. Brit. Mus.: 76, 135 (a junior objective synonym of polaris Sabine 1824 [originally in Alpheus]). Opinion 671
Orthosphinctes Schindewolf 1925, Neues Jahrb. Min., Beil.-Band. 52(B): 2, 324 (gender: masculine) (type species, by original designation: Ammonites tiziani Oppel 1863, Pal. Mitt., 1(3): 246) (Cephalopoda). Opinion 504
Orthothrix Geinitz 1847, Bull. Soc. imp. Nat. Moscou, 20(2): 84 (gender: feminine) (type species, by designation by Dall 1877 (Bull. U.S. nat. Mus., 8: 53): Orthis excavata Geinitz 1842, Neues Jahrb. Min., Geol. Pal. Abh., 1842: 578, pl. 10, figs. 12, 13) (Brachiopoda). Opinion 625
Orthunga Dohrn 1859, Catalogus Hemipterorum: 105 (gender: feminine) (type species, by monotypy: Emesa wahlbergi Stål 1855, Öfvers. k. Vetenskaps Akad. Handl., 12: 45) (Insecta, Hemiptera). Opinion 1260
Oryctogale Merriam 1902, Proc. biol. Soc. Washington, 15: 161 (gender: feminine) (type species, by original designation: Mephitis leuconota Lichtenstein [1832-1834], Darstell. Säugth. (9): text to pl. 44, fig. 1) for use by those who consider on taxonomic grounds that Oryctogale Merriam is distinct from Conepatus Gray 1837 (Mammalia). Opinion 384
Oryx Blainville 1816, Bull. Sci. Soc. philomat. Paris, 1816: 75 (gender: masculine) (type species, by designation by Sclater & Thomas 1899 (Book of Antelopes, 4: 41): Antilope oryx Pallas 1777, Spicil. Zool. (1): 16, valid name: Capra gazella Linnaeus 1758) (Mammalia). Direction 23
oryx Pallas 1766 [originally in Antilope], Miscell. Zool.: 9 (Mammalia). Direction 23
oryx Pallas 1777 [originally in Antilope], Spicil. Zool. (1): 16 (a junior primary homonym of oryx Pallas 1766 [originally in Antilope]). Direction 23
oryza Linnaeus 1763 [originally in Curculio], Amoen. Acad., 6: 395 (ruled under the plenary power to be an incorrect original spelling for oryzae Linnaeus 1763 [originally in Curculio]). Opinion 572
oryzae (emendation under the plenary power of oryza) Linnaeus 1763 [originally in Curculio], Amoen. Acad., 6: 395 (specific name of the type species of Sitophilus Schoenherr 1838) (Insecta, Coleoptera). Opinion 572
Oryzaria Defrance in Bronn 1825, System der urweltlichen Pflanzenthiere, p. 31 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Foraminiferida). Opinion 1501
oryzicola Oken 1816 [originally in Berus], Lehrb. Naturgesch., 3: 248 (included in a work rejected for nomenclatural purposes). Opinion 651
oryzivorus Suckow 1798 [originally in Coluber], Anfangsgrunde der theoretischen und angewandten Naturgeschichte der Thiere, 3, von den Amphibien, p. 245 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Reptilia). Opinion 1463