Pilbaradytes abydosianus, 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 abydosianus sp. nov. Figs 43 , 44

Type locality.

WA, Pilbara, 100 km SE of Port Hedland, Abydos deposit, 21°08'31.1"S, 119°06'53.99"E.

Type series.

HT ♂, WA, Pilbara, 100 km SE of Port Hedland, Abydos Mine, 21°08'31.1"S, 119°06'53.99"E (WGS84) 10 Nov. 2008, P. Bell, Trog trap; (ABY01_ABRC029-10LN6261), Western Australian Museum Entomology Reg. no. 82624 (WAM).

Differential diagnosis.

Medium sized species (TL mm 2.12), easily distinguishable from P. webberianus sp. nov. by smaller head and by serrulated lateral edges of pronotum.

Description of the HT ♂.

TL mm 2.12. Body elongated, depigmented, yellow-testaceous; shiny integument, with evident microsculpture, covered with very sparse and short pubescence.

Head small, narrower than the base of pronotum. Labium without tooth. Antennae missing. Fronto-clypeal furrow slightly distinct; subrectilinear anterior margin of epistome.

Pronotum subrectangular, slightly transverse (max. width / max. length ratio = 1.22), maximum width at the base of the anterior third, very wide basal border, as wide as the anterior border, pronotum sides poorly arcuate anteriorly, subrectilinear and gently convergent posteriorly, laterally completely serrulate from the anterior seta to the basal angles, not emarginated before the base. Anterior angles rounded, only slightly prominent; posterior angles sharp and obtuse, not protruding. Disc slightly convex, with very sparse and short pubescence; median groove very shallow, slightly marked. Marginal groove wide and flat, very enlarged near the base; anterior marginal setae inserted inside the marginal groove, approximately on the anterior fifth; basal seta lacking.

Legs missing.

Elytra subrectangular, very elongated (max. length/max. width ratio = 1.79), maximum width at the middle, slightly emarginated in the pre-apical zone. Disc convex; shiny integument, with evident microsculpture and short, very sparse, upright pubescence. Humeri very marked, but rounded; post-humeral margin denticulate, with distinct crenulations up to 6th pore of the umbilicate series; elytral apices not separately rounded. Marginal groove wide and evident up to the 8th pore of the umbilicate series.

Chaetotaxy: scutellar pore large, foveate. Umbilicate series with 1st, 2nd, and 3rd pores of the humeral group not equidistant, 2nd and 3rd pores closest; 4th pore clearly farther from the 3rd one and placed at the end of the basal third of the elytron; 5th pore placed well after the middle length of the elytron; 5th and 6th pores spaced out ca. the 1/3 of the distance from 6th and 7th ones; 7th, 8th, and 9th pores almost equidistant, 8th pore slightly displaced onto the disc and placed after the 9th one. One single discal seta laterally placed near the edge, midway between the 7th and the 9th pores.

Aedeagus (Fig. 44 ) relatively large, median lobe long, tubular, regularly curved, with basal bulb evident; ventral margin gently curved from the basal bulb to the apex; apical blade evident, but short. Endophallus without any sclerified phanerae. Left parameres slender and very elongated, reaching the distal fourth of the median lobe, and bearing two setae; right paramere stout and shorter than the left one, and bearing two setae.

Female. Unknown.

Etymology.

The name comes from the type locality Abydos deposit.

Distribution.

Pilbaradytes abydosianus sp. nov. is known only from the type locality 100 km SE of Port Hedland, Pilbara, WA.

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.