CLADOENDESIS OF EPHEMEROPTERA

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Autapomorphies of Promirara.

(1) Each tergalius I–VII besides costal rib [on costal margin – see Ameletopsis/fg1 (2)], has an additional strong curved subcostal rib at some distance from costal margin (unique apomorphy). Tergalii are strongly enlarged, tergalius I is "sub-elytroid" (Jell & Duncan 1986: 120), tergalius VII is the largest.

Characters of Promirara of unclear phylogenetic status.

(2) Tergalii have "basal fibrilliform tuft" (Jell & Duncan 1986: 120) [ventral fibrillose lobe – see Ameletopsis/fg1 (4)]; the same in Chiloporter and Mirawara.

(3) Larval cerci with secondary swimming setae (Jell & Duncan, 1986: Fig.2G) [unlike Mirawara – see Ameletopsis/fg1 (5)].

Plesiomorphy of Promirara. Unlike Chiloporter, abdomen has posterolateral spines, especially large on segment IX.