CLADOENDESIS OF EPHEMEROPTERA
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Litobrancha

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna Bidentiseta Furcatergaliae  
Fimbriatotergaliae Fossoriae Ephemera/fg9 Hexagenia/fg1 Eatonica/g1 - Litobrancha)

Nomen hierarchicum: Litobrancha/g(1) [g:1971]

In circumscription fits:

— gen. Litobrancha McCafferty 1971a: 45

— Litobrancha/g(1): Kluge 2004: 242

References. Burks 1953 (Hexagenia recurvata): ; – McCafferty 1971a: ; – 1975: ; – Edmunds & Jensen & Berner 1976: ; – Kluge 2004:

Autapomorphy of Litobrancha.

(1) Vestige of tergalius I [see Ephemera/fg9 (4)] is unilamellate. Non-unique apomorphy (see Index of characters [1.3.33]).

Plesiomorphies of Litobrancha. Larval claw of fore leg is normally developed (unlike Eatonigenia). Imaginal and subimaginal gonostylus with 2 distal segments (unlike Eatonica/g2 and Eatonigenia). Penis has no shape peculiar for Eatonigenia.

Size. Fore wing length 15–24 mm. 

Distribution. Eastern Nearctic.

Nominal species in Litobrancha/g(1): 1 species

recurvata Morgan 1913 [Hexagenia]

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