Pilbaradytes webberianus, 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 webberianus sp. nov. Fig. 45

Type locality.

WA, Pilbara, 150 km SE of Port Hedland, Mount Webber Mine, 21°32'16.81"S, 119°17'17.88"E.

Type series.

HT ♀, WA, Pilbara, 150 km SE of Port Hedland, Mount Webber Mine, 21°32'16.81"S, 119°17'17.88"E (WGS84), E.S. Volschenk, S. Catomore, 05"Sept. 2010; Trog. trap (COF01-MW025-10:9656) Western Australian Museum Entomology Reg. no. 82616 (WAM). PTT: 1 ♀, WA, Pilbara, 150 km SE of Port Hedland, Mount Webber Mine, 21°32'08.09"S, 119°17'18.4"E (WGS84), E.S. Volschenk, S. Catomore, 04"Sept. 2010, Trog. trap (COF01-MW090-10:9708) Western Australian Museum Entomology Reg. no. 82617 (CGi).

Differential diagnosis.

Medium size species (TL mm 2.23), easily distinguishable from P. abydosianus sp. nov. by the larger head and the smooth lateral edges of the pronotum.

Description of the HT ♀.

TL mm 2.23. Body elongated, depigmented, yellow-testaceous; shiny integument, with evident microsculpture, covered with very sparse and short pubescence.

Head small, approximately as wide as the base of the pronotum. Labium without tooth. Antennae with relatively elongated antennomeres, short, just exceeding the base of the pronotum when stretched backwards. Fronto-clypeal furrow slightly distinct; subrectilinear anterior margin of epistome.

Pronotum subrectangular, slightly transverse (max. width / max. length ratio = 1.23), maximum width at the base of the anterior fifth, with very wide basal border, as wide as the anterior border, pronotum sides poorly arcuate anteriorly, subrectilinear and very slightly sinuated posteriorly, laterally completely smooth from anterior seta to basal angles, not emarginated before the base. Anterior angles rounded, only slightly prominent; posterior angles right, sharp, not protruding. Disc slightly convex, with very sparse and short pubescence; median groove very shallow, slightly marked. Marginal groove narrow and flat, not enlarged near the base; anterior marginal setae inserted inside marginal groove, approximately on the anterior seventh; basal seta absent.

Legs relatively long and slender. In females, unarmed pro- and metafemora; normal metatrochanters.

Elytra subrectangular, very elongated (max. length/max. width ratio = 1.85), maximum width at the middle, lateral sides slightly emarginated at the end of the basal third and in the pre-apical zone. Disc convex; shiny integument, with evident microsculpture and short, sparse and 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 9th 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. half of the distance from 6th and 7th; 7th, 8th, and 9th pores almost equidistant, 8th and 9th pores closer to each other than 7th and 9th; 8th pore placed after the 9th one. One single discal seta laterally placed near the edge, midway between the 7th and the 9th pores.

Male. Unknown.

Etymology.

The name comes from the type locality Mount Webber, in the Pilbara region.

Distribution.

Pilbaradytes webberianus sp. nov. is known only from Mount Webber, 150 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.