CLADOENDESIS OF EPHEMEROPTERA

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z 

(1) Tergalius VII lacks fibrillose lobe [see Branchitergaliae (3)]. Non-unique apomorphy; among Radulapalpata the same in some Heptagenia/f5=g4 and some Cinygmula.

(2) Titillators [see Pentamerotarsata (5)] are lost. Non-unique apomorphy; among Epeorus/fg1 the same in Bleptus and some Epeorus/fg3 (see Index of characters [2.3.15]).

(3) Superlinguae diverge toward apex (Kluge 1988: Fig.29). The same in Bleptus (ibid.: Fig.96). Probably, this is a symplesiomorphy of Bleptus and Ironodes within Epeorus/fg1, but in this case similarity of Rhithrogena/fg2 and Epeorus/fg3 (whose superlinguae are widest in middle part and convergent toward apex) can be explained only as a convergention. Possibly, vice verse, convergention is the similarity of Bleptus and Ironodes, while similarity of Rhithrogena/fg2 and Epeorus/fg3 is a symplesiomorphy within Rhithrogena/fg1.

Plesiomorphies of Ironodes. Mandible is longer than in Epeorus/fg2, with incisor and kinetodontium slender. Maxilla is long [see Radulapalpata (3)], apical margin bears long hairs and vestiges of pectinate setae [see Epeorus/fg1 (5)], canines are not thickened (Kluge 1988: Fig.34–35) (symplesiomorphy with Bleptus, unlike Epeorus/fg3). Larval cerci have no dorsal hairs (unlike Epeorus/fg3).