CLADOENDESIS OF EPHEMEROPTERA

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Autapomorphies of Tikuna.

(1) Fore wing with yellow coloration in costal field proximad of pterostigma and in subcostal field posteriad of pterostigma (Kluge 2009: Fig.21, 24, 28; Kluge 2015: Fig.112)

Characters of Tikuna of unclear phylogenetic status. 

(2) Both dorsal and ventral lamellae of tergalii II–VI with projections by sides of terminal point  [see Terpides/fg1 (18)] (in contrast to Terpides/fg2 and Fittkaulus).

(3) Subimaginal cuticle of all legs of male and female 1^st tarsomere (shortened) is covered by microtrichiae, and 2^nd–5^th tarsomeres are covered by blunt microlepides. The same in Fittkaulus, in contrast to Terpides/fg2, whose 1^st tarsomere of male fore leg is covered by microlepides [about other legs – see Terpides/fg1 (10)].

(4) Subimaginal cuticle of mesonotum is colorless ((in contrast to Terpides/fg2 and Fittkaulus).

(5) Costal projection of hind wing is prominent (the same in Fittkaulus, in contrast to Terpides/fg2).

Plesiomorphies of Tikuna.  

(6) Gonostylus with 2 apical segments (Kluge 2009: Fig. ) (the same in Terpides/fg2, in contrast to Fittkaulus).

(7) Egg without two rows of plates (Kluge 2015: Fig.118–124). In contrast to Terpides/fg2.