CLADOENDESIS OF EPHEMEROPTERA
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Figure 87. Caenoptera-Caenis/fg* macrura [Caenis], pterothorax structure.

A – male imaginal pterothorax, lateral view; B – male imaginal pterothorax, median section; C – male imaginal pterothorax, posterior view (arrow shows section in Fig.D); D – longitudinal section of hind part of male pterothorax (by line shown in Fig.C) (compare with Fig.104:C–D); E – female imaginal pterothorax, posterior view; F – male imaginal pterothorax, ventral view (nerve chain shown by interrupted line); G – male imaginal pterothorax, dorsal view; H – subimaginal exuviae of right half of mesonotum.

Abbreviations: AES – anepisternum; FSp – furcasternal protuberance; LPN – lateropostnotum; MTN – metanotum; PhM – middle phragma; PSp – posterior scutal protuberance; S.LPNm – scuto-lateropostnotal muscle; SLS – sublateroscutum; TIS - transverse interscutal suture.