CLADOENDESIS OF EPHEMEROPTERA
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Figure 45. Oligoneuriella/g2 tskhomelidzei [Oligoneuriella], labium.

A – transverse section of labium (setae shown on right side only); B – tskhomelidzei [Oligoneuriella], labium, dorsal view (in left half) and ventral view (in right half) [setation not shown (actually glossae, paraglossae and palps are densely covered by setae), submentum turned at plain of glossal disc (actually it is directed perpendicular to it), muscles shown by interrupted lines]; compare with Figs 37:D and 41:B).

Abbreviations: gl – glossa; pgl – paraglossa; p.lb – 2^nd+3^rd segment of labial palp.