Gilesdytes pardooanus, 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

Gilesdytes pardooanus sp. nov. Fig. 40

Type locality.

WA, Pilbara, 100 km E of Port Hedland, Pardoo Mine, 20°17'19.72"S, 119°10'38.88"E.

Type series.

HT ♀, WA, Pilbara, 100 km E of Port Hedland, Pardoo Mine, (WGS84) 20°17'19.72"S, 119°10'38.88"E, N. Stevens, 02 Oct. 2007, Trog. Trap (PDRC779-LN743), Western Australian Museum Entomology Reg. no. 82634 (WAM).

Differential diagnosis.

Medium sized species (TL mm 2.11), easily distinguishable from G. ethelianus sp. nov. by the discal pore placed towards the elytral edge, and from G. vixsulcatus by the denticulate lateral edge of the pronotum before the basal angle.

Description of the HT ♀.

TL 2.11 mm. Body elongated, depigmented, testaceous; integument shiny, with evident microsculpture, covered with very sparse and short pubescence.

Head relatively large, narrower than pronotum. Labium bearing a median tooth. Antennae short and delicate, moniliform, just exceeding the base of the pronotum when stretched backwards. Fronto-clypeal furrow slightly distinct; anterior margin of the epistome subrectilinear.

Pronotum subrectangular, slightly transverse (max. width / max. length ratio = 1.05), maximum width at the anterior third, with very wide basal border, slightly wider than anterior border, pronotum sides anteriorly poorly arcuate, and laterally-posteriorly denticulate before the basal angles. Anterior angles obtuse, slightly prominent; posterior angles sub squared not protruding, gently rounded at the vertex. Disc slightly convex, with very sparse and short pubescence; median groove very shallow, faintly marked. Marginal groove relatively wide and flat, very enlarged near the base; anterior marginal setae inserted inside marginal groove, approximately on the anterior fifth; basal setae inserted approximately on the posterior angles.

Legs long and slender, with metatrochanters normal and metafemora unarmed.

Elytra subrectangular, very elongated (max. length/max. width ratio = 1.92), maximum width at the anterior 3rd, slightly emarginated before apex. Disc poorly convex; integument shiny, with evident microsculpture and very short, sparse and upright pubescence. Humeri hardly marked, almost right; post-humeral margin denticulate, with distinct crenulations up to the 9th 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 almost equidistant; 4th pore slightly displaced onto the disc and clearly farther from the 3rd pore, placed at the end of the basal third of the elytron; 5th pore placed just after the middle length of the elytron; 5th and 6th ones spaced out ca. the 1/3 of the distance from 6th and 7th; 7th, 8th, and 9th not equidistant, 8th and 9th pores closest, 8th pore located after the 9th one; 8th slightly displaced onto the disc. One single discal seta laterally placed towards the edge, at the level of the 9th pore.

Male. Unknown.

Etymology.

The name of the species comes from the type locality Pardoo, in the Pilbara region (WA).

Distribution.

Gilesdytes pardooanus sp. nov. is known only from the type locality (Pardoo Mine), 100 km E of Port Hedland, Pilbara, WA.

Figures

Figures 38 - 42. Gilesdytes gen. et spp. nov., habitus (38, 40, 41) aedeagus in lateral view (39, 42) 38, 39 G. vixsulcatus (Baehr and Main), ♂ 40 G. pardooanus sp. nov., HT ♀ 41, 42 G. ethelianus sp. nov., HT ♂. Scale bars: 0.1 mm.