Magnanillus sabae, 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 sabae sp. nov. Figs 18-20

Type locality.

WA, Pilbara, 60 km NW of Tom Price, Solomon Mining Area, Serenity deposit, 22°8'4.02"S, 117°32'3.444E.

Type series.

HT ♂, WA, Pilbara, 60 km NW of Tom Price, Solomon Mining Area, Serenity mine, (drill hole SMD0057), 22°8'4.02"S, 117°32'3.444E (WGS84), N. Coen, S. Catomore, 19 Apr. 2011, Trog. net scrape, Western Australian Museum Entomology Reg. no. 82651 (WAM). PTT: 1 ♀, WA, Pilbara, 60 km NW of Tom Price, Solomon Mining Area, Serenity mine, (drill hole SR0126), 22°11'22.70"S, 117°32'28.68E (WGS84), N. Coen, S. Catomore, 30 May 2011, Trog. net scrape, Western Australian Museum Entomology Reg. no. 82652 (WAM); 1 ♀, WA, Pilbara, 60 km NW of Tom Price, Solomon Mining Area, Sheila Valley, (drill hole SV0577), 22°13'1.236"S, 117°40'55.2E (WGS84), N. Coen, S. Catomore, 18 Apr. 2011, Trog. Net scrape, Western Australian Museum Entomology Reg. no. 82640 (WAM);1 ♂, WA, Pilbara, 60 km NW of Tom Price, Solomon Mining Area, Sheila Valley, (drill hole SV0443), 22°14'45.59"S, 117°38'46.71E (WGS84), S. Eberhard, S. Catomore, 05 Oct. 2010, Stygo net haul., Western Australian Museum Entomology Reg. no. 82615 (CGi); 1 ♀, WA, Pilbara, 50 km N of Tom Price, Solomon Mining Area, Zion mine, (drill hole SM0282) 22°12'00.8"S, 117°57'16.71E (WGS84), E.S. Volschenk, N. Krawczyk, 01.Mar. 2010, Trog. Trap, Western Australian Museum Entomology Reg. no. 82610 (WAM).

Differential diagnosis.

Magnanillus. sabae sp. nov. can be easily distinguished from M. firetailianus sp. nov. by its base of pronotum ca. as large as the pronotal apex. It can be distinguished from M. salomonis sp. nov., M. regalis sp. nov., and M. serenitatis sp. nov. by its short metatrochanters not reaching the femoral tooth. It differs from M. pearsoni (Baehr & Main, 2016) by longer elytra and more transverse pronotum.

Description.

TL mm 2.42-2.46 ♂♂, 2.48-2.51 ♀♀. Body elongated, depigmented, testaceous; integument shiny, with evident microsculpture and very short pubescence.

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

Pronotum sub-squared (max. width / max. length ratio = 1.14), with maximum width at the base of the anterior fourth, and basal border slightly wider than anterior border; sides slightly and irregularly arcuate in the anterior part, subrectilinear in the basal half, not sinuate and slightly denticulate before basal angles. Anterior angles obtuse, slightly prominent; posterior angles obtuse, blunted. Disc convex, with very short and sparse pubescence; 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 on the disk, but placed before the posterior angles.

Legs long and slender, with metatrochanters long, acuminate and subrectilinear and metafemora dentate; metatrochanters (Fig. 19 ) shorter than femoral tooth. Two dilated protarsomeres in males.

Elytra subrectangular, relatively short (max. length / max. width ratio = 1.63), not truncated and very slightly emarginated before apex. Disc convex, with longitudinal grooves; very short, sparse, and upright pubescence not longitudinally aligned. Humeri well marked, obtuse; post-humeral margin denticulate, with a distinct crenulation down to the apical third; elytral apices separately rounded. Marginal groove wide and evident almost up to the 7th 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 elytron; 5th and 6th ones spaced out ca. 1/3 of the distance from 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, first placed before the 4th pore of the umbilicate series, second one placed just before the 5th, third one placed before the 7th pore.

Aedeagus (Fig. 20 ) large, median lobe long, stout, gently curved, with basal bulb small but evident; ventral margin gently curved from basal bulb to apex; apical blade poorly evident, very short. Endophallus without an evident lamella copulatrix, but with two small, apical, subparallel, and slightly sclerified stripes. Left paramere elongate, not reaching the aedeagal distal third and bearing two setae; right paramere shorter and bearing two apical setae.

Etymology.

The name is to remind one of the Solomon mining area and the different deposits where this species occurs, and it originates from the mythological Queen of Sheba (in Latin Sheba = Saba ). According to tradition, the Queen of Sheba visited the Kingdom of Solomon with valuable gifts for its king.

Distribution.

Magnanillus sabae sp. nov. is known from different deposits of the Solomon Mining Area, 50-60 km N/NW of Tom Price, Pilbara, WA.

Figures

Figures 18 - 20. Magnanillus sabae sp. nov., HT ♂ 18 habitus 19 right metafemur and metatrochanter in ventral view 20 aedeagus in lateral view. Scale bars: 0.1 mm.