CLADOENDESIS OF EPHEMEROPTERA

CLADOENDESIS OF EPHEMEROPTERA
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Similicloeon/g1

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna pm.Tridentiseta
Tetramerotarsata Liberevenata Turbanoculata
Anteropatellata Cloeon/fg1 - Similicloeon)

Nomen hierarchicum: Similicloeon/g1 [g:1992]

In circumscription fits:
— gen. Similicloeon: Kluge 2016:491-516: 493

— Similicloeon/g1: Kluge 2016:491-516: 493

Nominal taxon included: Intercloeon/g(1) [g:1992]

References. Sowa 1980: * *; – Kluge & Novikova 1992: * *; – Kluge 2016:491-516: * *

Characters of Similicloeon of unclear phylogenetic status.

() Larval femur with 1 stout subapical seta (see Index of characters [1.2.16]).

() Larval caudalii with strongly stretched last segments, which lack swimming setae (Kluge & Novikova 1992: Fig.5:10-11) (unlike Procloeon/g1 and Pseudocentroptilum).

() External projection of penial bridge [see Cloeon/fg1 ()] is truncate or rounded (Kluge & Novikova 1992: Fig.4:7-9). The same in Procloeon/g1.

() Hind wings [see Cloeon/fg1 ()] are always absent (Kluge & Novikova 1992: Fig.4:1; Fig.6:1) (see Index of characters [2.2.59]).

Plesiomorphies and variable characters of Similicloeon. Labial palp with 3^rd segment [truncate – see Cloeon/fg1 ()] either non-widened (in simile [Cloeon] et al), or widened apically (in spiniventre [C.] and peteropolitanum [C.]).

Unlike Cloeon/fg2, larval tergalii are not widened, dorsal lamella of moderate size, without anterior-proximal lobe (Kluge & Novikova 1992: Fig.5:2-9); eggs with stout chorion.

Unlike Procloeon/g1, larval cerci without enlarged spines on outer side (Kluge & Novikova 1992: Fig.5:10-11).

Size. Fore wing length 5–10 mm (see Tetramerotarsata).

Distribution. Probably, Palaearctic, Oriental and Australian Regions (for certain – Palaearctic).

Nominal species in Similicloeon/g(1):

languidum Grandi 1959 [Cloeon]