Similicloeon Kluge & Novikova 1992

Kluge, Nikita J., 2016, A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae), Zootaxa 4107 (4), pp. 491-516 : 493

Genus Similicloeon Kluge & Novikova 1992

= Intercloeon Kluge & Novikova 1992 , syn. n.

Hierarchical name: Similicloeon /g1: Kluge 2011: 362

Type species: Cloeon simile Eaton 1870 .

Diagnosis. Larva. In contrast to Cloeon , additional dorsal lamella of tergalii without anterior-proximal projection; dorsal lamella may be absent on tergalii of some posterior pairs. Labial palp with 3rd segment (truncate) either widened, or non-widened. Cerci and paracercus with long bare last segments (as in Cloeon , in contrast to Pseudocentroptilum and Procloeon ). In contrast to Procloeon , distal part of cercus without one large spine on each segment ( Kluge & Novikova 1992: Fig. 5 : 10–13).

Winged stages. In contrast to Cloeon , unpaired sclerotized projection of penial bridge semicircular or truncate; fore wing of female not colored. Known species without hind wings. Oviparous.

Distribution. For certain known from Palaearctic Region.

Composition. Similicloeon petropolitanum ( Kluge & Novikova 1992 [ Cloeon (Intercloeon) ]) comb. n., Similicloeon praetextum ( Bengtsson 1914 [ Cloeon ]) comb. n., Similicloeon schoenemundi ( Bengtsson 1936 [ Cloeon ]) comb. n., Similicloeon simile ( Eaton 1870 [ Cloeon ]) comb. n., Similicloeon spiniventre ( Kluge & Novikova 1992 [ Cloeon (Intercloeon) ]) comb. n.

Discussion. Originally, Intercloeon was separated from Similicloeon by widened labial palp, which was regarded to be a synapomorphy of Intercloeon and Procloeon ( Kluge & Novikova 1992) . Actually, this character repeatedly appears among Cloeonini, that is proven by the fact that both widened and non-widened labial palps are found among species of the holophyletic taxon Cloeon s.str.

Figures

FIGURES 1 – 10. Procloeon (Oculogaster) cylindroculum, larva. 1 – 7, tergalii of I – VII pairs (specimen from Uganda); 8, 9, apices of left and right mandibles, dorsal view; 10, apex of right mandible, apical view. Abbreviations: in 1, in 2, in 3, in 4, denticles of incisor; in-V, ventral denticle of incisor; kd 1, kd 2, kd 3, denticles of kinetodontium.