Sibirigena

CLADOENDESIS OF EPHEMEROPTERA
			zzz	A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Sibirigena

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna Bidentiseta Branchitergaliae
Heptagennota Pentamerotarsata Radulapalpata
Rhithrogena/fg1_Epeorus/fg1Rhithrogena/fg2_CinygmulaRhithrogena/fg3 - Sibirigena)

Nomen hierarchicum: Sibirigena/g(1) [g:2004]

In circumscription fits:

— Sibirigena/g(1): Kluge 2004: 196

Reference. Kluge 2004: * * *

Autapomorphy of Sibirigena.

(1) Each tergalius II–VI [involved to sucking disk – see Rhithrogena/fg1 (3)] has a roundish projection on its posterior-dorsal margin; in various species this projection has a form from shallow convexity (Kluge 2004: Fig.62:J–K) to a sharp finger-like process.

Characters of Sibirigena of unclear phylogenetic status.

(2) In imago and subimago 1^st segment of fore tarsus is short, several times shorter than 2^nd. The same in Rhithrogena/fg4, unlike Himalogena and Epeiron/g1; the same in some other taxa (see Index of characters [2.2.76]).

(3) Each penis lobe is elongate, apically narrowed or roundish, with gonopore on dorsal side at some distance from tip; medio-dorsal and latero-dorsal spines are absent (unlike Rhithrogena/fg4 and Himalogena). Titillators [see Rhithrogena/fg3 (5)] can be either will developed, or vestigial, or lost (the same in Epeiron/g1).

Size. Fore wing length 7–13 mm.

Distribution. East Palaearctic (from Altai to Far East) and Nearctic.

Nominal species in Sibirigena/g(1):

brunnea Hagen 1875 [Heptagenia]