CLADOENDESIS OF EPHEMEROPTERA
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Figure 95. Pantricorythi: Vietnamella and Austremerella.

A–E – Vietnamella/fg1: A–B – ornata [Ephemerellina], holotype, fore and hind wings (drawn from subimago, but marginal setae not shown); C–E – thani [Vietnamella]: C – apex of right maxilla, ventral view (dentisetae shown by dots); D–E – holotype, right tergalius I: D – right margin of abdominal segment I (fused with metathorax) and segment II, dorsal view (tergalius I in natural position, tergalius II removed); E – optic section of tergalius I. F–G – Austremerella/fg* picta [Austremerella], right tergalii II, VI and VII, dorsal view (on tergalii II and VI ventral lobe turned apart and shown from ventral side).

Abbreviations: d – dorsal lobe of tergalius; cx, tr – posterior margin of hind coxa and trochanter; v:a – anal branch of ventral lobe; v:c – costal branch of ventral lobe.