Procloeon Bengtsson 1915

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 : 494

Genus Procloeon Bengtsson 1915

= Pseudocloeon Bengtsson 1914 (non Pseudocloeon Klapalek 1905 ) Branch “11”: Kluge & Novikova 1992: Fig. 11

Hierarchical name: Procloeon /g1: Kluge 2011: 362

Type species: Cloeon bifidum Bengtsson 1912 .

Diagnosis. Larva. On lateral side of distal part of cercus each segment bears one greatly enlarged spine ( Figs 22 , 60 ) (unique autapomorphy, not found in any other taxa). Cerci and paracercus without long bare last segments (the same in Pseudocentroptilum ). In contrast to Cloeon , additional dorsal lamella of tergalii without anteriorproximal projection; in some species dorsal lamella is lost. Labial palp with 3rd segment (truncate) always widened.

Winged stages. In contrast to Cloeon , unpaired sclerotized projection of penial bridge semicircular or truncate; fore wing of female not colored. Hind wings present or absent. Oviparous or viviparous.

Distribution. Holarctic, Oriental and Afrotropical Regions.

Composition. The genus Procloeon сan be divided into several subgenera, among which the largest nominative subgenus Procloeon s.str. is a plesiomorphon ancestral to subgenera Pseudocentroptiloides Jacob (in Jacob & Glazaczow) 1987 , Oculogaster sugen. n., and others.

Figures

FIGURES 11 – 20. Procloeon (Oculogaster) cylindroculum, larva. 11 – 17, tergalii of I – VII pairs (specimen from Zambia); 18, frontal suture; 19, claw; 20, fore leg, anterior view (fine setae not shown; dots show bases of fine setae forming regular rows on apical part of femur, proximal part of tibia and proximal part of tarsus).

FIGURES 21 – 29. Procloeon (Oculogaster) cylindroculum, larvae from Zambia. 21, cercus and paracercus; 22, distal part of cercus; 23 – 25, abdominal terga and sterna; 26, right half of pronotum and mesonotum; 27, subimaginal exuviae of right half of mesonotum; 28, maxilla; 29, labrum.

FIGURES 59 – 64. Procloeon (Oculogaster) album sp. n., larva. 59, paracercus and cercus (with subimaginal cercus inside); 60, distal part of cercus; 61, posterior margin of abdominal tergum X; 62, fragment of abdominal tergum III; 63, fragment of abdominal sternum VI; 64, tergalius VI (arrow shows additional middle rib) (59, 60, holotype).