CLADOENDESIS OF EPHEMEROPTERA
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INDEX OF CHARACTERS

1.2. LARVA:
THORAX AND ITS APPENDAGES
Thorax [1.2.1], prothorax [1.2.2–3], mesothorax and fore protoptera [1.2.4–8], metathorax and hind protoptera [1.2.9–10], legs [1.2.11–53]

[1.2] Thorax

— forms notal shield – see [1.2.1]

[1.2.1] Notal shield

— present: Posteritorna (3)

— oval: Prosopistoma/f1=g2 ()

— with pair of lateral projections: Baetisca/f3=g2 (4)

— compressed dorsoventrally: Fascioculus (2)

— strongly convex: Baetisca/f4=g3 (2)

Prothorax of larva [1.2.2–4]

[1.2.2] Pronotum

— fused with mesonotum: Posteritorna (3), Coloburiscus/fg1 (2)

— fused with propleura: Campsurus/fg1 (3)

— with projected anterior angles: Thraulobaetodes (5), Cincticostella/g1 (2)

— with antero-lateral denticles: part of Fimbriatotergaliae (1)

— with anterior setose projections: Behningia/fg1 (1)

— with lateral projections: Ametropus (1),

— with postero-lateral projections: Pseudiron (1), Ecdyonurus/fg2 (1), Behningia/fg2 (1)

— with dorsal paired projections: Thraulobaetodes (5)

— with pair of cavities: Pseudiron (1)

— with collar: Fimbriatotergaliae (1)

— with V-shape impression: Ephemerella/fg1 (4)

— with submedian tubercles: Neoephemera/fg2 (1)

— with sexual dimorphism: part of Tricorygnatha (13)

— laterally with setae: Jappa/g1 () 

— with pair of transverse rows of stout setae: Hermanellonota (2)

[1.2.3] Propleuron

— transformed to apodeme: Furcatergaliae (1)

— fused with pronotum: part of Furcatergaliae (1) {Campsurus/fg1 (3)}

— with anterior projection: Platybaetis (2)

[1.2.4] Prosternum

— with unpaired projection: Acanthametropus/fg1 (4), Ametropus (3)

— with gill: part of Eusetisura (3)

— narrowed, with furcate apodeme: Cryptoprosternata (1)

— expanded laterally: Platybaetis (2)

— with pair of flaps: Platybaetis (2)

Mesothorax and fore protoptera of larva [1.2.5–8]

[1.2.5] Mesonotum

— together with pronotum forms notal shield – see [1.2.1]

— has paranota anteriad of protoptera: Ametropus (1)

— with collar: [Classifications of Furcatergaliae I] (3), Potamanthus/fg1 (2), Euthyplocia/fg1 (7), Caenotergaliae (5), Ephemerella/fg1 (11)

— with lateral projections: Cincticostella/g1 (2)

— with sharp lateral projections: Cincticostella/g1 (not all) (2) {Ephacerella (P)}

— with flat lateral projections: part of Cincticostella/g1 (2) {Cincticostella/g3 (1)}

— with dorsal tubercles: Thraulobaetodes (5), Neoephemera/fg2 (1)

[1.2.6] Fore protoptera

— spread: Ametropus (1), Pseudiron (1)

— with divergent costal margins: Ametropus (1)

— divergent: Discoglossata (3)

— convergent: Coloburiscus/fg1 (2), Ephemerella/fg1 (not all) (5)

— fused with notum up to end of scutellum: Turbanoculata (8), Eusetisura (5), Pentamerotarsata (2), part of Caenotergaliae (2)

— fused by mesal plate behind notum: Posteritorna (3), part of Turbanoculata (8) {Pseudopannota/g2 (9)}, part of Eusetisura (5) {Coloburiscus/fg1 (2), Discoglossata (3)}, Ephemerella/fg1 (5)

— fused by apices: Tricorygnatha (2)

— enclosed into notal shield: Posteritorna (3)

[1.2.7] Mesopleuron

— with projection and setae: Behningia/fg1 (1)

[1.2.8] Mesosternum

— with pair of longitudinal ridges: Posteritorna (3)

— with unpaired projection: Acanthametropus/fg1 (4)

— with bifurcate projection: Isonychia/fg1 (4)

— with gill: part of Eusetisura (3)

Metathorax and hind protoptera of larva [1.2.9–10]

[1.2.9] Metanotm

— with dorsal projection: Thraulobaetodes (5)

[1.2.9a] Hind protoptera

— differ from hind wings: Tricoryptera (not all) (2) {Ephemerythus (4), Leptohyphes/fg1 (not all) (2)}

— absent – see [2.2.59]

[1.2.10] Metasternum

— with pair of projections: Isonychia/fg1 (4)

— with gill: part of Eusetisura (3)

LEGS OF LARVA
Leg [1.2.11], coxa [1.2.12], trochanter [1.1.13], femur [1.2.14–16], tibia [1.2.17–18], tarsus [1.2.19], claw [1.2.20–24]; 
fore leg [1.2.25–37], middle leg [1.2.38–43], hind leg [1.2.33–49], common features of certain leg pairs [1.2.50–53]

[1.2.11] Larval legs of all 3 pairs

— able to stretch posteriorly: Siphlonurus/fg1 (P), Dipteromimus (P), Ameletus/fg1 (P), Metretopus/fg1 (P), Acanthametropus/fg1 (P), Siphlaenigma (P), Turbanoculata (not all) (VAR), Nesameletus/f1=Metamonius/g1 (P), Rallidens (P), Isonychia/fg1 (P)

— unable to stretch posteriorly: part of Turbanoculata (VAR), Heptagennota (1), Furcatergaliae (6)

— used for swimming: part of Heptagennota (1)

— folded and pressed by sides to body when swimming: part of Heptagennota (1) {Rhithrogena/fg2 (3)}

[1.2.12] Coxa (see also [1.2.26, 1.2.39, 1.2.45])

— with gill – see [1d]

[1.2.13] Trochanter – see fore leg [1.2.27]

Femora of larva [1.2.14–16]
(about femora of certain pairs – see also [1.2.28–29], [1.2.40], [1.2.46])

[1.2.14] Femur

— inserted into concavity: Prosopistoma/f1=g2 ()

— flattened: Heptagennota (1), Dicercomyzon (6)

— narrow, arched: Brachycercus/f1=g3 (5)

— with curved apical projection: Turbanoculata (11)

[1.2.15] Femur setation (see also [1.2.16])

— tuft of microchaetae (villopore): Baetofemorata (1), part of Labiobaetis/f2=g1 (6)

— stout setae forming one transverse row: Scutoptilium ()

— spiny setae in 2 transverse rows: Coloburiscus/fg1 (4)

— on outer margin – see [1.2.16]

[1.2.16] Outer margin of femur (see also [1.2.15])

— without regular row of setae:  part of Turbanoculata (VAR) {Indocloeon (13), ... }, Heptagenia/f6=g5 (P)

— with long hairs and long stout irregular setae: Heptagenia/f7=g6 (2), Raptoheptagenia (4)

— without long setae: Kageronia (4)

— with regular row of setae: part of Turbanoculata (VAR) {... }, Ecdyonurus/fg1 (4), Cinygma (7), Rhithrogena/fg1 (5), Madecocercus (3), Ephemerella/fg2 (not all) (P), Pantricorythi (not all) (1)

— 1 subapical seta: Crassabwa/g1 (2), Similicloeon ()

— 2 subapical setae: Indocloeon (14), Potamocloeon (), Demoulinia (11), Oculogaster (), Cloeon/fg2 (not all), Cloeodes/g1 (), Fallceon (), Caribaetis (), Tenuibaetis (), Rhodobaetis (), Baetis/?? () ...

— 2+2 subapical setae: Monocentroptilum (1)

Tibiae of larva [1.2.17–18]
(about tibiae of certain pairs – see also [1.2.30–35], [1.2.41], [1.2.47])

[1.2.17] Tibia

— shortened: Acanthametropus/fg1 (3), Ametropus (1)

— with regular row of setae: Micksiops (), Afroptiloides (), Deceptiviosa (), Echinobaetis (), Acentrella/fg1 (3), Baetodes/g2 () 

— with dense dorsal setae: Baetiella/g1 (), Epeorus/fg2 (3)

— with stout clavate seta on outer margin at distance from apex: Nanomis ()

— with outer-apical seta on all legs: ?Turbanoculata () {Monocentroptilum (), Indocloeon/g2 (8), Dabulamanzia (), Dicentroptilum (), Xyrodromeus (), Dicentroptilum (), Rhithrocloeon/fg2 () {Bugilliesia ()}, Oculogaster (), Cloeodes (), Centroptella (),  ... }

— with outer-apical seta on fore leg only: Hindocloeon (8), Potamocloeon (), Dabulamanzia (), Protopatellata gen.sp.1, Protopatellata gen.sp.2, ...

— without outer-apical seta on all legs: Demoulinia (12), Centroptiloides (), Crassabwa/g1 (3), Thraulobaetodes (), ???Anafroptilum (), 

[1.2.18] Patella-tibial suture (among all Ephemeroptera)

— absent on fore leg, present on middle and hind leg: Siphlonurus/fg1 (P), Dipteromimus (P), Ameletus/fg1 (P), Metretopus/fg1 (P), Acanthametropus/fg1 (P), Ametropus (P), Siphlaenigma (P), pm.Protopatellata (not all) (P) {Anafroptilum, Indocloeon (P), Rhithrocloeon/fg1 (P), Dabulamanzia (P), Crassabwa/g1 (), Monocentroptilum (), Potamocloeon (), ...}, Centroptella/g1 (), Rivudiva (), Nesameletus/f1=Metamonius/g1 (P), Vetulata (P), Ameletopsis/fg1 (P), Rallidens (P), Coloburiscus/fg1 (P), Isonychia/fg1 (P), Arthroplea (P), Heptagenia/f5=g4 (P), Cinygma (P), Paegniodes (P), Cinygmula (P), part of Epeorus/fg1 (8) {Belovius/g2 (2)}, Potamanthus/fg1 (P), Ichthybotus (P), Ephemera/fg9 (P), Dolania (P), Palingenia/f2=g1 (P), Polymitarcys/f2=Ephoron/g3 (P), Leucorhoenanthus (P), Pulchephemera (P), Potamanthellus (P), Ephemerella/fg1 (not all) (VAR), Leptophlebia/fg1 (not all) (VAR) {Leptophlebia/fg2 (P), Calliarcys (P), Terpides/g1 (15), Castanophlebia (P), Aprionyx (P), Ghatula (P), Ceylonula (P), Notophlebia (??imago??) (), Sulawesia (P), Jappa/g1 (not all) (), Atalomicria (P), ??Atalophlebia/fg* (P), Nyungara (P), Celiphlebia (P), Hapsiphlebia (), Massartella (), Massartellopsis (), Meridialaris (), Nousia (), Penaphlebia ()}

— present on all legs: Anteropatellata (not all) (1), Rhithrogena/fg3 (2),

— incomplete on all legs: Petersula/g2 ()

— absent on fore leg, complete on middle leg, incomplete on hind leg: Kimminsula/g3 (1)

— absent on all legs: Posteritorna (11), part of Protopatellata (P) {part of Centroptiloides/g2 (), Demoulinia (3)} part of Anteropatellata (1) {part of Waynokiops (VAR)}, Discoglossata (8), Pseudiron (2), Epeorus/fg1 (not all) (8), part of Euthyplocia/fg1 (VAR), Protobehningia (2), Campsurus/fg1 (7), Ochernova (1), part of Caenoptera (17), part of Ephemerella/fg1 (VAR), part of Leptophlebia/fg1 (VAR) {Hagenulus/fg1 (1), Nathanella (), Choroterpes/fg1 (non imago!) (2), Indialis/g1 () (non imago!) Kirrara (), Maheathraulus (), }

— absent on fore and middle legs, present on hind leg: Caenoptera (not all) (17), part of Leptophlebia/fg1 (VAR) {Habrophlebia/fg1 (non imago!) (3), Isca/fg1 (non imago!) (18), Megaglena (non imago!) (), ??Atalophlebia/fg* (), ?part in Jappa/g1 ()}

— absent on fore and hind legs, present on middle leg: part of Euthyplocia/fg1 (VAR), Behningia/fg3 (2)

— vestigial on fore legs: Centroptella (1) 

— ? with sharp curvation: Cloeon/fg1 ()

— longitudinal: Thraulobaetodes (4), Baetodes/g2 () 

— S-like curved or shifted distally: Potamocloeon (), Centroptella/g1 (), Adenophlebia (), 

— with conspicuous row of long hairs: Potamocloeon (), Centroptella (1), Cloeodes/g1 (1)

— not reaching inner side of tibia: Thraulobaetodes (), Centroptiloides/g2 (not all) ()

Tarsus of larva [1.2.19]
(about tarsi of certain pairs – see also [1.2.36], [1.2.42], [1.2.48])

[1.2.19] Tarsus

— segmented: †Permoplectoptera (P), Ameletopsis/fg1 (6)

— arched: Camelobaetidius/g1 (1), Pseudiron (1)

— with ventral subapical seta: Jubabaetis/g2 (1), part of Papuanatula ()

Claw of larva [1.2.20–24]
(about claws of certain pairs – see also [1.2.37], [1.2.43], [1.2.49])

[1.2.20] Claw

— absent: Behningia/fg2 (1)

— elongate: Acanthametropus/fg1 (6), Ametropus (1), Pseudiron (1), Brachycercus/f1=g3 (5)

— swollen in male: Palingenia/f3=g2 (4)

— brush-like: Camelobaetidius/g1 (1)

[1.2.21] Denticles on inner side of claw (not subapical denticles on anterior side – see [1.2.22])

— absent or very small and irregular: Posteritorna (P), Siphlonurus/fg1 (P), Dipteromimus (P), Ameletus/fg2 (P), Metretopus/fg1 (1), Acanthametropus/fg1 (P), Ametropus (P), part of Tetramerotarsata (11) {Potamocloeon (), part of Cloeon/fg1 (P), part of Cloeodes/g1 (VAR), part of Baetungulata (1)}, Siphluriscus (2), Vetulata (P), Ameletopsis/fg1 (P), Rallidens (P), part of Homoeoneuria/fg1 (2), Pseudiron (1), Heptagenia/f7=g6 (3), Fimbriatotergaliae (not all) (P) {Brachycercus/f1=g3 (5)}, part of Ephemerella/fg1 (18) {Timpanoga/fg3 (1)}, part of Leptophlebia/fg1 (8) {... Aprionyx (), Atalomicria (), part of Jappa/g1 {Neboissophlebia ()}}

— 2 denticles: Tricorygnatha (3)

— in 1 row: Metreletus (2), part of Tetramerotarsata (11) {part of Rhithrocloeon/fg2 (4) {Rhithrocloeon/fg3 (2)}, Dabulamanzia/g1 (), Afrobaetodes (), Monocentroptilum (), Baetungulata (not all) (1) {Camelobaetidius/g1 (1)}}, Eusetisura (not all) (6), Pentamerotarsata (not all) (4) {Kageronia (5)}, Caenis/f4=g2 (not all) (3), Ephemerella/fg1 (not all) (18) {Tricorygnatha (3)}, Leptophlebia/fg1 (not all) (9)

— in 2 rows: Tetramerotarsata (not all) (11) {Centroptiloides/g2 (), Indocloeon (16), Thraulobaetodes (7) Rhithrocloeon/fg2 (not all) (4) {Bugilliesia (4)}, Crassabwa/g1 (), Anafroptilum (), Cloeon/fg1 (not all) (P), Callibaetis/fg1 (P) {Callibaetis/fg2 (2)}, Cloeodes/g1 (not all) (VAR), part of Baetungulata (1) {Heterocloeon (1), Andesiops/g1 ()}}, Nesameletus/f2=Metamonius/g2 (4), part of Homoeoneuria/fg1 (2) {Oligoneurisca (1)}, part of Ephemerella/fg1 (18) {part of Melanemerella/fg1 (VAR)}, part of Leptophlebia/fg1 (8) {Dactylophlebia ()}

— in 1 row, no one larger than others: Traverella/g1 () 

— in 1 row, with apical denticle larger than others: Guajirolus/g1 (9), Hermanellonota (not all) (3), Traverina (), Miroculis/g1 (),

— in 1 row, with middle denticle larger than others: Castanophlebia (???)

[1.2.22] Subapical denticles on anterior (dorsal) side of claw

— present: Pentamerotarsata (not all) (4), part of Ephemerella/fg1 (5), part of Leptophlebia/fg1 (8)

[1.2.23] Proximal projection

— flexible: Siphluriscus (2)

— present: Chiloporter (2)

— absent: Ameletopsis/fg2 (P), Mirawara (P), Chaquihua (P)

[1.2.24] Subapical setae of claw

— 2 setae (one on each side): Centroptiloides/g2 (), Monocentroptilum (), part of Baetofemorata ()

— only on posterior side: Baetodes/g1 (), Caribaetis (), Moribaetis (), Mayobaetis (),  Spiritiops (?), part of Papuanatula ()

Fore leg of larva
Fore leg [1.2.25], coxa [1.2.26], trochanter [1.2.27], femur [1.2.28–29], tibia [1.2.30–35], tarsus [1.2.36], claw [1.2.37]

[1.2.25] Fore leg (unlike middle and/or hind)

— diminished: Ametropus (3), Behningia/fg2 (1), Brachycercus/f1=g3 (5)

— palp-like: Ametropus (3), Behningia/fg2 (1)

— filtering: Eusetisura (1), Clypeocaenis/fg1 (1)

— grasping: Drunella/g1 (1), Vietnamella (3), †Mesogenesia/g1 (1)

— burrowing: Exeuthyplocia/fg1 (3), Fossoriae (not all) (1) {Ichthybotus (2), Ephemera/fg10 (3), Hexagenia/fg1 (4), Protobehningia (1), Cryptoprosternata (2) {Palingenia/f2=g1 (4), (5), (9), Polymitarcys/f2= Ephoron/g3 (2), Campsurus/fg1 (6)}, †"Mesopalingea", †"Torephemera", †"Siphangarus"}

Coxa of larval fore leg [1.2.26]

[1.2.26] Coxa of fore leg (see also [1.2.12])

— with condylus close to median line of body: Cryptoprosternata (1)

— elongate: †Mesogenesia/g1 (1)

— with projection: Ametropus (3)

— with gill – see [1d]

Trochanter of larval fore leg [1.2.27]

[1.2.27] Trochanter of fore leg

— wedged into anterior side of femur: Cryptoprosternata (2, 3B)

Femur of larval fore leg [1.2.28–29]

[1.2.28] Femur of fore leg (see also [1.2.14–16])

— widened (as middle leg): Acanthametropus/fg1 (2)

— on inner side proximally with projection: Camelobaetidius/g2 (1)

— with concave anterior side (as middle): Fossoriae (1)

— with inner-proximal convexity bearing long setae: Cryptoprosternata (2, 3B)

— with protuberances on proximal convexity: Polymitarcys/f2=Ephoron/g3 (2)

— widened, with denticulate inner margin: Drunella/g1 (not all) (1), Vietnamella (3)

— widened, with setose inner margin: †Mesogenesia/g1 (1)

— widened, with outer margin convex proximally: Leptophlebia/fg1 (8) 

[1.2.29] Setation of fore femur (see also [1.2.15–16])

— on inner side 2 rows of long setae: Eusetisura (1)

— on proximal convexity long setae: Cryptoprosternata (3)

— on proximal convexity regular U-shape row of long setae: part of Cryptoprosternata (3B) {Polymitarcys/f1=Ephoron/g2 (1B)}

— on dorsal side transverse row of setae: [Classifications of Furcatergaliae I] (2), Potamanthus/fg1 (not all) (3) {Rhoenanthus/g1 (not all) (VAR)}, Caenotergaliae (not all) (6), Ephemerella/fg1 (not all) (12)

— on dorsal side transverse row continued distally on outer margin: Pantricorythi (not all) (1)

Tibia of larval fore leg [1.2.30–35]

[1.2.30] Tibia of fore leg (see also [1.2.17–18])

— without patella-tibial suture – see [1.2.18]

— with vestigial patella-tibial suture: Centroptella (1) 

[1.2.31] Outer margin of fore tibia

— with spine-like setae: Palingenia/f2=g1 (not all) (5) {Pentagenia (P), Chankagenesia (P), Anagenesia/g2 (P), Plethogenesia (P), Cheirogenesia (P)}

— with denticles: part of Palingenia/f2=g1 (5) {Palingenia/f4=g3 (2), Mortogenesia (2)}

[1.2.32] Inner margin of fore tibia

— proximally convex: Eusetisura (1)

— with long setae: Eusetisura (1), Cryptoprosternata (3D), Clypeocaenis/fg1 (1)

— with 2 longitudinal rows of long setae: Eusetisura (1), part of Cryptoprosternata (3D) {Polymitarcys/f1=Ephoron/g2 (1D)}

— with 2 transverse rows of long setae: Clypeocaenis/fg3 (2)

— with dense bipectinate setae: Leptophlebia/fg1 (8)

— with dense stout setae: Jappa/g1 () 

[1.2.33] Anterior (dorsal) side of fore tibia

— with long setae: Clypeocaenis/fg2 (2)

— with long setae in oblique row: Cryptoprosternata (3C)

— with long setae in oblique row continuing as 2 longitudinal rows: Polymitarcys/f1=Ephoron/g2 (1C)

— with long setae in 2 oblique rows: Palingenia/f2=g1 (4)

[1.2.34] Posterior (ventral) side of fore tibia

— with tubercles: Polymitarcys/f2=Ephoron/g3 (2)

[1.2.35] Apex of fore tibia

— with appendage: Isonychia/fg1 (5)

— with projection: Euthyplocia/fg1 (3), Drunella/g1 (1)

— with incision: Fossoriae (not all) (1) {Ichthybotus (2), Hexagenia/fg1 (4), Palingenia/f2=g1 (9), †"Torephemera"

— without incision: Ephemera/fg10 (3) 

— with outer-apical seta (unlike middle and hind legs) – see [1.2.17]

Tarsus of larval fore leg [1.2.36]

[1.2.36] Tarsus of fore leg (see also [1.2.19])

— articulated to anterior side of tibia: Ametropus (3)

— on inner side with 2 rows of setae: Isonychia/fg1 (5)

— with oblique row of long setae: Clypeocaenis/fg3 (2)

— with apical projection: Euthyplocia/fg2 (2), Polyplocia (4)

— vestigial: Homoeoneuria/g1 (1)

— fused with tibia: Protobehningia (1), Campsurus/fg1 (6)

Claw of larval fore leg [1.2.37]

[1.2.37] Claw of fore leg (see also [1.2.20–24])

— bifurcate: Metretopus/fg1 (1)

— with setae: Ametropus (3)

— with denticles: Metretopus/fg1 (1), Asthenopus/fg1 (2)

— with longer denticles: Callibaetis/fg2 (2)

— vestigial: Homoeoneuria/g1 (not all) (1) {Oligoneurisca (P)}, Eatonigenia (1)

— absent: part of Homoeoneuria/g1 (1) {Homoeoneuria/g2 (1)}

Middle leg of larva [1.2.38–43]

[1.2.38] Middle leg (see also [1.2.11–24])

— directed forward (as fore leg): Fossoriae (1), †Mesogenesia/g1 (2)

— specialized for moving in sand: Behningia/fg2 (1)

[1.2.39] Coxa of middle leg (see also [1.2.12])

— elongate (as hind leg): Homoeoneuria/g1 (2)

— with gill (as fore leg): Siphluriscus (1)

[1.2.40] Femur of middle leg (see also [1.2.14–16])

— widened (as fore leg): Acanthametropus/fg1 (2)

— widened (as hind leg): Rhionella (1)

— with filtering setae (as fore leg): Coloburiscus/fg1 (3)

— with concave anterior side (as fore leg): Exeuthyplocia/fg1 (3), Fossoriae (1)

— shortened: Behningia/fg2 (1)

[1.2.41] Tibia of middle leg (see also [1.2.17–18])

— shortened (as hind leg): Oligoneurisca (1)

— wide, with inner-apical projection: Behningia/fg2 (1)

— without patella-tibial suture (unlike hind leg) – see [1.2.18]

— with patella-tibial suture (as hind leg) – see [1.2.18]

— with patella-tibial suture (unlike other legs): part of Euthyplocia/fg1 (VAR), Behningia/fg3 (2)

[1.2.42] Tarsus of middle leg (see also [1.2.19])

— with reversed setation (as hind leg): Oligoneurisca (1)

— wide, arched: Behningia/fg2 (1)

[1.2.43] Claw of middle leg (see also [1.2.20–24])

— straight (as hind leg): Homoeoneuria/g1 (2)

— with 2 rows of denticles (as hind leg): Oligoneurisca (1)

— without denticles (as hind leg): Homoeoneuria/g2 (1)

Hind leg of larva [1.2.44–49]

[1.2.44] Hind leg (see also 1.2.11–24])

— specialized for moving in sand: Behningia/fg2 (1)

[1.2.45] Coxa of hind leg (see also [1.2.12])

— enlarged: Behningia/fg2 (1)

— elongate (as middle leg): Homoeoneuria/g1 (2)

[1.2.46] Femur of hind leg (see also [1.2.14–16])

— lamelliform: Homoeoneuria/g1 (2), Behningia/fg3 (2)

— widened (as middle leg): Rhionella (1)

— on inner side with spiny setae: Fimbriatotergaliae (not all) (9)

— on inner side without spiny setae: part of Fimbriatotergaliae (9) {Palingenia/f2=g1 (11), Behningia/fg1 (14), Caenotergaliae (11)}

[1.2.47] Tibia of hind leg (see also [1.2.17–18])

— shortened (as middle leg): Oligoneurisca (1)

— on inner side with spiny setae: Fimbriatotergaliae (not all) (9)

— on inner side without spiny setae: part of Fimbriatotergaliae (9) {Palingenia/f2=g1 (11), Behningia/fg1 (14), Caenotergaliae (11)}

— on outer side with stout setae: Leptophlebia/fg1 (8)

— on inner-distal margin with projection: Ephemera/fg9 (3), Palingenia/f2=g1 (10)

— strongly diminished: Behningia/fg2 (1)

— with patella-tibial suture (unlike other legs) – see [1.2.18]

— with patella-tibial suture (as middle leg) – see [1.2.18]

— without patella-tibial suture (unlike middle leg): part of Euthyplocia/fg1 (VAR), Behningia/fg3 (2)

[1.2.48] Tarsus of hind leg (see also [1.2.19])

— with reversed setation (as middle leg): Oligoneurisca (1)

— elongate: Behningia/fg2 (1)

— bent in joining with tibia: Behningia/fg3 (2)

[1.2.49] Claw of hind leg (see also [1.2.20–24])

— longer than fore and middle: Acanthametropus/fg1 (2)

— straight (as middle leg): Homoeoneuria/g1 (2)

— with 2 rows of denticles (as middle): Oligoneurisca (1)

— without denticles (as middle): Homoeoneuria/g2 (1)

Common features of larval legs [1.2.50–53]

[1.2.50] Common for all legs – see [1.2.11–24]

[1.2.51] Common for fore and middle leg

— with gill: Siphluriscus (1)

— femur widened: Acanthametropus/fg1 (2)

— femur concave anteriorly: Exeuthyplocia/fg1 (3), Fossoriae (1)

— tibia with 2 rows of long setae: Coloburiscus/fg1 (3)

— femur with row of long thin setae: Indialis/g1 (1), Sangpradubina (1)

— without patella-tibial suture – see [1.2.18] 

[1.2.52] Common for middle and hind leg

— specialized for moving in sand: Behningia/fg2 (1)

— coxa elongate: Homoeoneuria/g1 (2)

— femur widened: Rhionella (1)

— femur with transverse row of stout setae: Kimminsula/g1 ()

— with patella-tibial suture – see [1.2.18]

— tibia shortened, tarsus with reversed setation, claw with 2 rows of denticles: Oligoneurisca (1)

— claw straight: Homoeoneuria/g1 (2)

— claw without denticles: Homoeoneuria/g2 (1)

[1.2.53] Common for fore and hind leg

— without patella-tibial suture: part of Euthyplocia/fg1 (VAR), Behningia/fg3 (2)