CLADOENDESIS OF EPHEMEROPTERA

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Autapomorphies of Araucophlebia.

(1) In larva, long spine-like setae on outer margin of tibia are present not only on hind legs [see Leptophlebia/fg1 (8)], but also on middle legs (Kluge 2014: Fig.6).

(2) Denticles on posterior margins of abdominal terga I–IX are reduced. Unlike Nousia/g2, whose denticles on posterior margins of abdominal terga are well developed (Pescador & Peters 1985: Fig.58; Finlay 2000: Fig.22).

(3) Eggs have unusual disk-like shape (Kluge: Fig.21-23). Unlike Nousia/2, whose eggs have a usual ellipsoid shape (Pescador & Peters 1985: Fig.56-57; Finlay 2000: Fig.28).

(4) Tergalii have dorsal lamella oval, with sharply separated slender apical process (Kluge 2014: Fig. 10, 30). Unlike Nousia/g2, whose tergalii have both lamellae lanceolate and without terminal process (Pescador & Peters 1985: Fig.51-54; Finlay 2000: Fig.23).

Characters of Araucophlebia of unclear phylogenetic status. 

(5) Penis has simple outline of lateral sides (unlike Nousia/g2); median sclerotized processes [see Nousia/g1 (1)] are massive (Kluge 2014: Fig.13-14).