Gregorydytes ophthalmianus, 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

Gregorydytes ophthalmianus sp. nov. Figs 8-9

Type locality.

WA, Pilbara, 25 km W of Newman, Ophthalmia Range, 23°16'41.39"S, 119°24'13.28"E.

Type series.

HT ♂, WA, Pilbara, 25 km W of Newman, Ophthalmia Range, 23°16'41.39"S, 119°24'13.28"E (WGS84), P. Bell, N. Coen, 25 June 2010, Trog. net scrape; (BHP020_EXR1691-LN:9124), Western Australian Museum Entomology Reg. no. 82611 (WAM). PTT: 1 ♀, WA, Pilbara, 25 km W of Newman, Ophthalmia Range, 23°16'41.39"S, 119°24'13.28"E (WGS84), P. Bell, N. Coen, 14 August 2010, Trog. net scrape (BHP020_EXR1691-LN:9362), Western Australian Museum Entomology Reg. no. 82612 (CGi).

Differential diagnosis.

Gregorydytes ophthalmianus sp. nov. differs from other Australian Anillini by the characters highlighted in the genus diagnosis.

Description.

TL mm 1.02 ♂-1.05 ♀. Body moderately elongated, depigmented, yellow-testaceous; integument shiny, with evident microsculpture and pubescence.

Head robust, not hypertrophic, narrower than pronotum; excess setae absent. Labium toothless, mentum articulated. Antennae robust, moniliform, short, hardly exceeding the base of the pronotum when stretched backwards. Fronto-clypeal furrow indistinct; subrectilinear anterior margin of epistome.

Pronotum transverse (max. width / max. length ratio = 1.25), with maximum width at the base of the anterior fourth, and basal border remarkably narrower than anterior border; sides distinctly and regularly arcuate anteriorly, sinuate before basal angles. Anterior angles rounded, not prominent; posterior angles obtuse and rounded. Disc convex, with very sparse pubescence of medium length; median groove very shallow, hardly evident. Marginal groove wide and flat, slightly enlarged near the base; anterior marginal setae placed inside the marginal groove, almost on the anterior fourth; basal setae at posterior angles.

Legs short and stout, with metatrochanters short and stout and metafemora non dentate. Two protarsomeres dilated and without adhesive phanerae in male.

Elytra subrectangular (max. length / max. width ratio = 1.55), with maximum width at the base of the posterior third, subtruncate but not emarginated before apex. Disc slightly convex, without longitudinal groove; integument shiny, with evident microsculpture and very sparse and upright pubescence of medium length, longitudinally aligned. Humeri well marked but rounded; post-humeral margin denticulate, with distinct crenulation up to the apical third; elytral apices separately rounded. Marginal groove wide and evident almost up to the 9th pore of the umbilicate series.

Chaetotaxy: large and foveate basal umbilicate pore. Umbilicate series with the first three pores of the humeral group very closed to each other and equidistant; 4th pore farther and placed at the end of the basal third of the elytron; 5th pore placed at the base the apical third of the elytron; 5th and 6th ones spaced from each other equidistant with 6th and 7th; 5th, 7th and 8th displaced onto the disc; 7th and 8th spaced from each other as 8th and 9th. Two discal setae, the first placed at the level of the 3rd pore of the umbilicate series, the second one placed just before the 8th pore.

Aedeagus (Fig. 9 ) small, median lobe short, stout, subrectilinear, with basal bulb extremely reduced; ventral margin gently bisinuated; apical blade evident. Endophallus without an evident lamella copulatrix. Left paramere elongated, reaching the aedeagal distal fourth and bearing only one seta; right paramere lost during the preparation of the specimen.

Etymology.

The name arises from the type locality Ophthalmia Range in the Pilbara region.

Distribution.

Gregorydytes ophthalmianus sp. nov. is known so far only from the type locality Ophthalmia Range, 25 km W of Newman, Pilbara, WA.

Figures

Figures 8, 9. Gregorydytes ophthalmianus gen. et sp. nov., HT ♂ 8 habitus 9 aedeagus in lateral view. Scale bars: 0.1 mm.