Bylibaraphanus currani (Baehr & Main, 2016)

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

Bylibaraphanus currani (Baehr & Main, 2016) Figs 46 , 47

Material examined.

2 ♂♂ 3 ♀♀, WA, Pilbara , 65 km NW of Tom Price, Cloudbreak Mine, 22°20'26.40"S, 119°25'50.70"E (WGS84), J. Cocking, M. Scanlon, 15 Mar. 2011, Trog. Net scrape (GNGC05589), Western Australian Museum Entomology Reg. no. 8269-82673 (WAM, CGi) .

Note.

Baehr and Main’s description (2016) is correct and detailed, although we noted a few inaccuracies and their description omits some important characters fundamental to the systematics of Anillini which, including male genitalia, are described as follows.

Differential diagnosis.

Species of small size (TL mm 1.47-1.50), easily distinguishable from B. cundalinianus sp. nov. by the basal angles of pronotum acute and protruding.

Redescription.

TL mm 1.49-1.50 ♂♂ 1.47-1.49 ♀♀. Body elongated, depigmented, yellow-testaceous; integument shiny, with evident microsculpture, covered with relatively long pubescence.

Head large, slightly narrower than the base of pronotum. Labium without tooth. Antennae 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 = 1.22), maximum width at the base of the anterior fourth, with very wide basal border, as wide as the anterior border, pronotum sides, anteriorly poorly arcuate, and posteriorly subrectilinear shortly and gently sinuated, laterally completely smooth from anterior seta to basal angles, not emarginated before the base. Anterior angles rounded, not prominent; posterior angles acute, sharp, protruding. Disc slightly convex, with very sparse and relatively long pubescence; median groove very shallow, slightly marked. Marginal groove narrow and flat, not particularly enlarged near the base; anterior marginal setae inserted inside marginal groove, at ca. the anterior third; basal setae inserted approximately on posterior angles.

Legs long and slender, with normal metatrochanters and unarmed metafemora; two protarsomeres slightly dilated and without adhesive phanerae in males.

Elytra subrectangular, very elongated (max. length/max. width ratio = 2.09), with parallel sides, slightly emarginated before apex. Disc convex; integument shiny, with evident microsculpture and short, very dense and upright pubescence. Humeri very marked, but rounded; post-humeral margin denticulate, with distinct crenulations up to 7th pore of the umbilicate series; elytral apices separately rounded. Marginal groove narrow and evident up to the 7th 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 half distance between 6th and 7th pores; 7th, 8th and 9th pores slightly displaced onto the disc and not equidistant, 8th placed after the 9th one. One single discal seta in the central area of the disc and placed approximately half way between the 6th and 7th pores.

Aedeagus (Fig. 47 ) relatively large, median lobe, in lateral view, relatively long and triangularly restricted at apex, regularly curved and not restricted before the basal bulb, basal bulb of normal size. Ventral margin gently curved from basal bulb to apex, emarginated just before the apex; apical blade evident, very long. Endophallus with a large, concave, well sclerified phanera in the middle area. Left parameres slender and very elongated, reaching the distal fourth of the median lobe, and bearing two setae; right paramere shorter than left one and bearing three setae.

Distribution.

B. currani is known only from Cloudbreak Mine, 65 km NW of Tom Price, Pilbara, WA.

Figures

Figures 46 - 48. Bylibaraphanus gen. et spp. nov., habitus (46, 48) aedeagus in lateral view (47) 46, 47 B. currani (Baehr and Main), ♂ 48 B. cundalinianus sp. nov., HT ♀. Scale bars: 0.1 mm.