Austranillus jinayrianus, 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

Austranillus jinayrianus sp. nov. Figs 36-37

Type locality.

WA, Pilbara, 110 km NW of Newman, Area C Mining Area, Jinayri deposit, 22°58'22.4"S, 119°15'37.9"E.

Type series.

HT ♂, WA, Pilbara, 110 km NW of Newman, Area C Mining Area, Jinayri Mine, 22°58'22.4"S, 119°15'37.9"E (WGS84), J. Cocking and M. Scanlon, 25 Nov. 2008. Trog. trap (JIN0744), Western Australian Museum Entomology Reg. no. 82674 (WAM).

Differential diagnosis.

Very large species (TL mm 2.98), easily distinguishable from A. macleayi by its larger size (mm 2.98 vs. mm 1.76 in A. macleayi ), by the position of the 4th pore of the umbilicate series placed further, and by the position of the anterior discal pore which is placed at the base of the posterior third of elytra.

Description of the HT ♂.

TL mm 2.98. Body elongated, depigmented, fulvo-testaceous; integument shiny, with evident microsculpture and sparse and short pubescence.

Head very small, much narrower than pronotum. Labium toothless. Antennae long and robust, not moniliform (with relatively elongated antennomeres), considerably exceeding the base of the pronotum when stretched backwards. Fronto-clypeal furrow indistinct; anterior margin of the epistome subrectilinear.

Pronotum slightly transverse (max. width / max. length ratio = 1.13) with maximum width at the anterior third, and a very wide basal border, wider than the anterior border. Pronotum sides anteriorly clearly arcuate, weakly sinuate and denticulate before the base, base laterally distinctly emarginated. Anterior angles rounded, not prominent. Posterior angles protruding, acute at the vertex. Disc slightly convex, with a short and relatively dense pubescence; median groove very shallow, slightly marked. Marginal groove relatively wide and flat, very enlarged near the base; anterior marginal setae inserted inside the marginal groove, on approximately the anterior third; basal setae inserted almost on the posterior angles.

Legs long and slender, with metatrochanters normal and metafemora unarmed. Two asymmetrically dilated protarsomeres, with one row of adhesive phanerae in male.

Elytra subrectangular, very elongated (max. length/max. width ratio = 1.77), with maximum width in the middle, very slightly emarginated before apex; sides slightly sinuate at the base of the anterior fourth. Disc poorly convex; integument shiny, with evident microsculpture and short, dense, upright pubescence. Humeri extremely marked, almost right angle; post-humeral margin denticulate, with a distinct crenulation up to the base of the apical third of the elytron; elytral apices separately rounded. Marginal groove wide and evident up to over the 9th pore of the umbilicate series.

Chaetotaxy: scutellar pore large, foveate. Umbilicate series with pores of the humeral group not equidistant; 4th pore slightly displaced towards the disc, not so far from the third pore and inserted just on the basal fourth of the elytron; 5th pore placed just before the apical third of the elytron; 5th and 6th pores spaced out, ca. 2/3 of the 6th and 7th; 7th, 8th and 9th pores almost equidistant and slightly displaced onto the disc, 8th pore placed after the 9th one. Two discal setae, first placed at the base of the apical third, second one placed at the level of the 9th pore.

Aedeagus (Fig. 37 ) large, median lobe long, slender, subrectilinear, with basal bulb poorly evident; ventral margin poorly and gently curved from the basal bulb to the apex; apical blade evident, but short and emarginated in the lower edge. Endophallus with a median, C-shaped, sclerified phanera. Parameres slender and very elongated, reaching the distal seventh of the median lobe, and bearing three setae only; right paramere slightly shorter than the left.

Etymology.

The name of the species comes from the type locality of the Jinayri deposit.

Distribution.

Austranillus jinayrianus sp. nov. is known only from the type locality, Jinayri deposit, in the Pilbara region, 110 km NW of Newman, WA.

Figures

Figures 36, 37. Austranillus jinayrianus sp. nov., HT ♂ 36 habitus 37 aedeagus in lateral view. Scale bars: 0.1 mm.