Kurbatoviella, Hlaváč, 2010

Hlaváč, Peter, 2010, Kurbatoviella antennata, a new peculiar genus and species of the Clavigeritae from Borneo (Coleoptera: Staphylinidae: Pselaphinae), Acta Entomologica Musei Nationalis Pragae 50 (2), pp. 471-475 : 472-474

Kurbatoviella gen. nov.

( Figs. 1–8 )

Type species: Kurbatoviella antennata sp. nov., present designation.

Diagnosis. Small but stout clavigerine with three segmented antennae; last antennal segment considerably longer than pedicel, with simple rounded unmodified apex. Head very long, not separated from neck, expanded posteriorly (a unique feature of the Clavigeritae ). Trichomes totally absent; sexual dimorphism not apparent.

Description. Whole body ( Fig. 1 ) light yellowish-brown, regularly pubescent. Head rectangular, very slightly narrowed from frons to mid-length; thereafter slightly expanded to basal margin. Neck not separated from head, disc in middle with deep, elongate depression. Anterior part and sides of head pubescent, temples very long, rostrum wide, slightly convex in middle. Eyes large, clearly visible from dorsal as well as from ventral side. Antennae ( Fig. 2 ) threesegmented; antennomeres I and II small, about the same size, scape partly hidden by antennal cavity, barely visible dorsally. Terminal antennomere very long, more than 15 times as long as pedicel, clavate and evenly curved outwards, round in cross section at apex; ventrally with two well-defined parallel carinae, median fovea located between them.

Pronotum pentagonal, clearly wider than long and much wider than head, longest in middle. Its base with median prominent triangular projection and with well-defined anterior groove and large depression on posterior part, slightly recessed into elytra. Posterior part widest and with sharp angles, lacking any fovea; scutellum not visible. Venter with proventrite ( Fig. 3 ) shiny, with sparse and fine pubescence; procoxae at anterior part separated by sharp proventral process. Mesoventrite and metaventrite ( Fig. 4 ) confluent, shiny, with regular pubescence; mesoventrite in middle slightly shorter than metaventrite. Basal mesoventral and apical metaventral process similar in shape and size, not meeting; mesocoxae separated, metacoxae separated by large truncate basal metaventral process. First visible sternite (III) about halflength of second (IV); second visible sternite about as long as sternites V–VII combined.

Elytra large ( Fig. 5 ), with fine microstructure and dense short pubescence, at suture more than twice as long as pronotum. Humeri well-defined, round but prominent.

Legs ( Figs.6–8 ) short, tibiae pedunculate, femora clavate, lacking any spines.

Abdomen shiny, sparsely pubescent. Composite tergite (IV–VI) concave, more than twice as long as tergites VII–VIII combined, with deep and large lateral foveae, lacking trichomes. Paratergites of composite tergite elongate, slender but well-defined.

Sexual dimorphism. Not apparent. This is the first clavigerine known to the author where males have simple tibiae lacking spines as found in females.

Differential diagnosis. Kurbatoviella gen. nov. resembles Disarthricerus in the general appearance but it can be readily separated from the latter by very long head, not separated from the neck and expanded posteriorly. Disarthricerus has neck well-separated from the short head.

Etymology. The new genus is named in honour of my friend Serguei Kurbatov, well-known specialist on Pselaphinae and Scydmaeninae , and the collector of the type series. Gender is feminine.

Figures

Fig. 1. Kurbatoviella antennata gen. et sp. nov., photo of habitus.

Figs. 2–8. Kurbatoviella antennata gen. et sp. nov. 2 – antenna; 3 – prosternum; 4 – meso- and metaventrite; 5 – right elytron; 6 – fore leg; 7 – midleg; 8 – hind leg.