(1) 2^nd+3^rd segment of labial palp [specialized as scraping – see Radulapalpata (1)] is blunt, thus the field of scraping setae terminates close to the end of sclerotized ridge (Kluge 2004: Fig.55:I). The same in Cinygma; probably, independently appeared apomorphy. In Kageronia, Ecdyonurus/fg1 and Rhithrogena/fg1 form of this segment is different.

(2) Whole outer margin of each larval femur always bears long hairs, and usually bears long stout blunt irregularly situated setae (Kluge 2004: Fig.55:C) (only in selected species these setae are short and pointed). Such femoral setation never occurs in other Radulapalpata [see Plesiomorphies of Heptagenia/f6=g5].

(3) Larval claws lack denticles on inner margin [see Pentamerotarsata (4)] (subapical denticles on anterior side of claw can be present or absent). The same in all other Radulapalpata except for Kageronia.

Plesiomorphy of Heptagenia/f7=g6. Larval caudalii retain swimming setae [vestigial – see Pentamerotarsata (6)].