CLADOENDESIS OF EPHEMEROPTERA
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Figure 63. Rhithrogena/fg2, adult mesonotum.

A–B – Cinygmula/g1 sapporensis [Siphlurus]: A – subimaginal exuviae of right half of mesonotum; B – imaginal mesonotum, dorsal view (compare with Fig.61:A). C–E: – Rhithrogena/fg3: C – Sibirigena/g* sibirica [Rhithrogena], subimaginal exuviae of right half of mesonotum; D–E – Rhithrogena/fg4 iridina [Baetis], imaginal mesothorax (bases of posterior scuto-coxal and scuto-lateropostnotal muscles shown by interrupted lines) (compare with Fig.56:L–M): D – dorsal view, E – lateral view (most part of pleura removes to show muscles). (From Kluge 1988a).

Abbreviations: LPs – lateroparapsidal suture; MNs – mesonotal suture; MPs – medioparapsidal suture; MTm – median tergal muscle; PSp – posterior scutal protuberance; r.l – relief line; S.CmP – posterior scuto-coxal muscle; S.LPNm – scuto-lateropostnotal muscle.