CLADOENDESIS OF EPHEMEROPTERA
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Figure 64. Rhithrogena/fg1: Paegniodes and Epeorus/fg1.

A–C – Paegniodes/g* cupulata [Heptagenia]: A – subimaginal mesonotum; B – left maxilla, ventral view (muscles shown by interrupted lines); C – middle part of larval cercus. D–M – Epeorus/fg1: D–G – Bleptus/g* fasciatus [Bleptus]: D – subimaginal exuviae of right half of mesonotum; E – left maxilla, ventral view (muscles shown by interrupted lines); F – glossae, dorsal view (in left half) and ventral view (in right half); G – hypopharynx and superlinguae, ventral view. H–M – Epeorus/fg2: H–K – Ironodes/g* nitidus [Iron]: H – left maxilla, ventral view, with apex enlarged (muscles shown by interrupted lines); I – glossae, dorsal view (in left half) and ventral view (in right half); J – setae on costal rib of tergalius; K – hypopharynx and superlinguae, ventral view; L–M – Epeorus/fg3 Belovius/g2 pellucida [Cinygma]: L – left maxilla, ventral view, with scraping setae of maxillary palp enlarged (muscles shown by interrupted lines); M – hypopharynx and superlinguae, ventral view) (C, E, F–J, L – from Kluge 1988a).