CLADOENDESIS OF EPHEMEROPTERA

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Autapomorphies of Habrophlebiodes/fg1.

(1) Hind wing is diminished; it has sharply expressed costal projection somewhat distad of middle of wing; costal field distad of the costal projection is absent – i.e. Sc terminates far from wing apex, falling into anterior margin just distad of costal projection.  Non-unique apomorphy, the same in many Atalophleboadentata (see Index of characters [2.2.62] and [2.2.63]). In Dipterophlebiodes hind wings are lost.

Character of Habrophlebiodes/fg1 of unclear phylogenetic status. 

(2) Branches of all tergalii I–VII [see Leptophlebia/fg1 (10)] are separated at more or less marked distance from base, not widened. The same in Neoleptophlebia, Calliarcys, Habrophlebia/fg1 and selected Atalophlebomaxillata.