Magnanillus firetailianus, 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

Magnanillus firetailianus sp. nov. Figs 15-17

Type locality.

WA, Pilbara, 50 km N of Tom Price, Solomon Mining Area, Firetail deposit, 22°07'25.3"S, 117°53'59.2"E.

Type series.

HT ♂, WA, Pilbara, 50 km N of Tom Price, Solomon Mining Area, Firetail Mine (drill hole FT0430), 22°07'25.3"S, 117°53'59.2"E (WGS84); G. Pearson, D. Main, 20 May 2010; Trog. Trap., Western Australian Museum Entomology Reg. no. 82657 (WAM). PTT: 6 ♂♂ 3 ♀♀ (+ remains of 1 ♂ 2 ♀♀), WA, Pilbara, 50 km N of Tom Price, Solomon Mining Area, Firetail Mine (drill hole FT0430), 22°07'25.3"S, 117°53'59.2"E (WGS84), G. Pearson, D. Main, 20 May 2010, Trog. Trap., Western Australian Museum Entomology Reg. no. 82658-82662 (WAM, CGi); 1 ♀, WA, Pilbara, 50 km N of Tom Price, Solomon Mining Area, Firetail Mine (drill hole FT1455), 22°08'53.1"S, 117°55'37.8"E (WGS84) G. Pearson, D. Main, 19 May 2010, Trog. Trap., Western Australian Museum Entomology Reg. no. 82663 (WAM).

Differential dagnosis.

Magnanillus firetailianus sp. nov. is easily distinguishable from the other species of this genus (except M. quartermaini (Baehr & Main, 2016)) by its pronotum with basal border narrower than anterior border. It also differs from M. sabae sp. nov., M. salomonis sp. nov. and M. regalis n. sp by much longer metatrochaters, extended over the position of the femoral tooth. M. firetailianus sp. nov. differs from M. serenitatis sp. nov. by its bigger size, while it differs from M. quartermaini by a less transverse pronotum.

Description.

TL mm 1.44-1.46 ♂♂, 1.48-1.50 ♀♀. Body elongate, depigmented, yellow; integument shiny, with evident microsculpture, and short pubescence.

Head robust, hypertrophic, slightly narrower than pronotum; without excess setae. Labium without tooth, mentum articulated. Antennae robust, moniliform, short, reaching the base of the pronotum when stretched backwards. Fronto-clypeal furrow indistinct; subrectilinear anterior margin of epistome.

Pronotum sub-rectangular (max. width / max. length ratio = 1.14), with maximum width at the base of the anterior fifth, and with basal border remarkably narrower than anterior border; sides slightly and irregularly arcuate in the anterior part, subrectilinear at the basal half, gently sinuate and slightly dentate before basal angles. Anterior angles obtuse, slightly prominent; posterior angles squared, acute. Disc convex, with very sparse pubescence of medium length; median groove very shallow, hardly evident. Marginal groove wide and flat, enlarged near the base; anterior marginal setae placed inside the marginal groove, almost on the anterior fifth; basal setae not inside the disk, but placed before posterior angles.

Legs long and slender, with metatrochanters long and acuminate, gently curved and metafemora dentate; metatrochanters (Fig. 16 ) slightly longer than femoral tooth. Two dilated protarsomeres in males.

Elytra perfectly subrectangular (max. length / max. width ratio = 1.80), not truncated and not emarginated before the apex. Disc convex, with longitudinal grooves; integument shiny, with evident microsculpture, very short, sparse, and upright, pubescence, not longitudinally aligned. Humeri well marked, gently 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 8th pore of the umbilicate series.

Chaetotaxy: scutellar pore large and foveate. 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 before the base of the apical third of the elytra; 5th and 6th ones spaced out ca. half of the distance between 6th and 7th; 7th and 8th displaced onto the disc; 7th and 8th spaced from each other as the 8th and 9th. Three discal setae, the first placed before the 4th pore of the umbilicate series, second one placed just before the 5th, the third one placed at the 7th pore.

Aedeagus (Fig. 17 ) large, median lobe long, stout, gently curved, with basal bulb small, but tight and evident; ventral margin gently curved from basal bulb to apex; apical blade evident but short. Endophallus without an evident lamella copulatrix, but with two small, apical, Y-shaped, crossing and slightly sclerified stripes. Left paramere elongated, not reaching the distal third and bearing two setae; right paramere shorter and bearing two apical setae.

Etymology.

The name comes from the type locality in the Solomon Mining Area, the Firetail deposit, in the Pilbara region.

Distribution.

Magnanillus firetailianus sp. nov. is known only from the type locality (Firetail deposit) 50 km N of Tom Price, Pilbara, WA.

Figures

Figures 15 - 17. Magnanillus firetalianus sp. nov., HT ♂ 15 habitus 16 right metafemur and metatrochanter in ventral view 17 aedeagus in lateral view. Scale bars: 0.1 mm.