CLADOENDESIS OF EPHEMEROPTERA
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Figure 65. Epeorus/fg3, larvae.

A – Belovius/g2, cross section through abdominal segment VIII and tergalii VII; B – Iron/g1, the same. C – Epeorus/fg4 zaitzevi [Epeorus], margin of abdominal tergum IV and right tergalius IV, dorsal view. D – Albertiron/g* albertae [Iron], right tergalius IV, dorsal view. E–F – Belovius/g2 pellucida [Cinygma]: E – right tergalius IV, dorsal view; F – apex of right maxilla, ventral view (dentisetae, canines and sclerotized areas shown by dots). G–I – Iron/g1 Ironopsis/g1: G – Caucasiron/g* caucasica [Cinygma], tergalius II, dorsal view; H–I – Ironopsis/g2 rheophilus [Iron]: H – anterior margin of tergalius II, dorsal view; I – median section of larval head capsule and labrum. (C, G, H – from Kluge 1997d).

Abbreviations: c1, c2, c3 – maxillary canines; cly – clypeus; ds1, ds2 – dentisetae; fr – frons; lbr – labrum.