Cloeon /fg1

Branch «6»: Kluge & Novikova 1992: Fig. 11.

Hierarchica name: Cloeon /fg1: Kluge 2012: 362.

Tribus Cloeonini: Kluge 2016: 492.

Diagnosis of Cloeon /fg1.

Larva. Both mandibles with dense setae between prostheca and mola (Figs 4, 18, 20). Labial palp with 3rd (distalmost) segment truncate (Figs 26–27). On anterior side of tibia, proximal end of patella-tibial suture bent distally and connected under acute angle with row of long thin hairs (Figs 30–31) (patella-tibial suture has equal structure on all legs – see Anteropatellata). Claw symmetric, slightly curved, with 2 similar rows of denticles (Fig. 32); in some taxa without denticles. Abdominal segment IX and often one or several previous uromeres with longitudinal row of spines on each lateral margin (Fig. 35). Tergalii often with anal-proximal expansion curved dorsally and forming a second (dorsal) lamella of tergalius; this lamella is absent in selected species of Procloeon /g1, including both species of Monilistylus (Figs 9–15). Tergalii able to intensive rhythmic respiratory movements. Larval cerci and paracercus with dark rings on each 4th joining (Fig. 8).

Subimago. All tarsomeres covered with pointed microlepides, without blunt microlepides. Process of posterodorsal angle of postsubalar sclerite diminished, pointed, with concave antero-dorsal margin (Fig. 43) (unlike other Turbanoculata, in which this process is larger and has convex antero-dorsal margin).

Winged stages (imago and subimago). On fore wing each space with no more than 1 marginal intercalary (Fig. 44). Hind wing, if present, of « Centroptilum - type »: relatively narrow and long, with hooked costal projection (in both species of Monilistylus hind wings absent).

Male genitals. Gonovectes fused by their median ends with penial bridge, unable for protraction (Fig. 52). Gonostylus with 2nd segment thickened apically, 3rd (distalmost) segment clavate (Figs 49, 53). In mature larva ready to molt to subimago, subimaginal gonostyli folded under larval cuticle by « Cloeon - type »: 2nd segment directed laterally, 3rd segment curved either caudally (Fig. 34), or caudally-medially.

Composition. Taxon Cloeon /fg1 includes Similicloeon Kluge & Novikova 1992 (= Intercloeon Kluge & Novikova 1992), Cloeon /fg2 (or genus Cloeon Leach 1815 s. str.), Waynokiops Hill, Pfeiffer & Jacobus 2010, Pseudocentroptilum Bogoescu 1947 [with the single species P. unguiculatum Tshernova 1941 (= P. motasi Bogoescu 1947)] and Procloeon /g1 (see below).