Pilbaradytes, Giachino & Eberhard & Perina, 2021

Giachino, Pier Mauro, Eberhard, Stefan & Perina, Giulia, 2021, A rich fauna of subterranean short-range endemic Anillini (Coleoptera, Carabidae, Trechinae) from semi-arid regions of Western Australia, ZooKeys 1044, pp. 269-337 : 269

Pilbaradytes gen. nov. Figs 43-45

Type species.

Pilbaradytes abydosianus sp. nov.

Diagnosis.

Included species strongly characterised by: lacking longitudinal elytral grooves, pronotum basal border as wide as anterior border, with sides posteriorly not or only slightly sinuate, basal seta of pronotum absent, one elytral discal seta placed near elytral edge, 8th pore of the umbilicate series placed after the 9th one (sensu Giachino and Vailati 2011), metafemora not dentate, labium tooth absent, median lobe of the aedeagus long and curved with parameres long and slender. Differs from Magnanillus Baher, 2017 by the absence of elytral longitudinal grooves, and by a single elytral discal seta (3 setae in Magnanillus ).

Description.

A genus of Anillini with species of a medium size (TL mm 2.12-2.23), anophthalmous. Integument depigmented but well sclerified, with strong microsculpture and covered with short and sparse pubescence.

Head as wide as, or narrower, than the pronotum base; mandibles short and simple, without hyperplasias. Maxillary palps ovoidal, swollen. Labium transverse, articulated; mentum not fused with submentum. Labial tooth absent. Antennae not strictly moniliform (with relatively elongated antennomeres).

Pronotum squared, with sides smooth or serrulate, not or only slightly sinuate towards the basal third. Basal angles right or obtuse, sharp, not rounded; basal border as wide as or wider than anterior margin; presence of only one marginal seta, posterior seta absent.

Elytra subrectangular, elongated, not separately rounded, not truncate and slightly emarginated apically; convex, without longitudinal grooves. Elytral striae missing (except for the sutural stria). Lateral margin, starting from the humeral area, hardly serrulate up to the level of 6th pore of the umbilicate series.

Scutellar pore present, large and umbilicate; umbilicate series of type B (sensu Jeannel 1963; Giachino and Vailati 2011) with the 8th pore placed after the 9th one; disc bearing one seta strictly located near the elytral edge.

Legs relatively long and slender. In female, unarmed pro- and metafemora; metatrochanters normal; male legs unknown.

Aedeagus relatively large; median lobe long, curved, with basal bulb of normal size. Parameres long, slender, bearing two apical setae. Endophallus without sclerified phanerae.

Etymology.

Composite name coming from the Pilbara region with the suffix - dytes (diver). Gender masculine.

Species included.

Currently two species belong to this genus:

Pilbaradytes abydosianus sp. nov.

Pilbaradytes webberianus sp. nov.

Figures

Figures 43 - 45. Pilbaradytes gen. et spp. nov., habitus (43, 45) aedeagus in lateral view (44) 43, 44 P. abydosianus sp. nov., HT ♂ 45 P. webberianus sp. nov., HT ♀. Scale bars: 0.1 mm.