CLADOENDESIS OF EPHEMEROPTERA
Heptagennota Pentamerotarsata Radulapalpata
Rhithrogena/fg1Epeorus/fg1Rhithrogena/fg2CinygmulaRhithrogena/fg3 - Epeiron/g1)
Nomen hierarchicum: Epeiron/g1 [g:1964] (incl. Tumungula)
In circumscription fits:
Epeiron/g(1): Kluge 2004: 195
Reference. Kluge 2004: * * *
Autapomorphies of Epeiron/g1.
(1) Tergalii [sucking, with costal ribs located far from costal margin see Rhithrogena/fg3 (3)] have peculiar shape: tergalii IIVI are short, with costal rib strongly curved; at least tergalius VI has incised posterior-distal margin (this is the margin, by which it overlaps anterior margin of tergalius VII) (Kluge 1987b: Fig.1522).
Character of Epeiron/g1 of unclear phylogenetic status.
(2) In imago and subimago 1st segment of fore tarsus is relatively long, subequal or equal to 2nd segment, rarely longer. Among Rhithrogena/fg3 the same in Himalogena, unlike Rhithrogena/fg4 and Sibirigena; the same in many other mayflies.
(3) Penis without titillators (unlike Rhithrogena/fg4, Himalogena and part of Sibirigena).
Size. Fore wing length 510 mm.
Distribution. Asia: from Asia Minor to Indo-China.
|The taxon Epeiron/g1 is divided into:|