CLADOENDESIS OF EPHEMEROPTERA
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Figure 11. Genitals of male imago of Ameletus/fg2 camtschaticus [Ameletus].

A – Abdominal sternum IX with styliger, gonostyli and penis, ventral view (muscles of styliger and right half of penis are shown by interrupted lines). B – Apex of abdomen, lateral view. C – Apex of abdomen with genitals in excited condition, lateral view (left cercus removed). D – the same, posterior view.

Abbreviations: 1, 2, 3, 4 – segments of gonostylus; gp – gonopore; gsty – gonostylus; p – penis; p.a – penial arm; pc – paracercus; sIX – abdominal sternite IX; sg – styliger.