Atheta (Dimetrota) whitehorsensis Klimaszewski & Godin

Klimaszewski, Jan, Godin, Benoit & Bourdon, Caroline, 2012, Further contributions to the aleocharine fauna of the Yukon Territory, Canada (Coleoptera, Staphylinidae), ZooKeys 186, pp. 207-237 : 213

Atheta (Dimetrota) whitehorsensis Klimaszewski & Godin sp. n. Figs 620, 2140-43

Holotype (male).

Canada, Yukon, Whitehorse, Granger, 60.7078, -135.0971, 25.VIII.2007, 657 m, soil sifting, black spruce stand, AWT, B. Godin (LFC).

Paratype.

Canada, Yukon, Whitehorse, Granger, 60.7078, -135.0971, 5.VIII.2007, 657 m, soil sifting, black spruce stand, AWT, B. Godin (ECW) 1 female.

Etymology.

The specific name derives from the name of the type locality, which is Whitehorse, Yukon.

Diagnosis.

Body narrowly oval, dark brown to black, with bases of antennae and legs rust-brown, surface matte, with asperate dense punctation on forebody and strong meshed microsculpture (Fig. 6); length 1.9-2.0 mm; head narrower than pronotum and elytra, with short postocular area, eyes large and slightly protruding; antennae slender, slightly incrassate apically, article 4 subquadrate, 5 slightly elongate and 6-10 slightly to strongly transverse; pronotum strongly transverse and broadest in the middle; elytra transverse, longer than pronotum; abdomen broadly arcuate laterally (Fig. 6). MALE: tergite 8 transverse and truncate apically (Fig. 40); sternite 8 widely rounded apically (Fig. 41); median lobe of aedeagus with venter of tubus straight and short, and apex sharply produced (Fig. 20). FEMALE: tergite and sternite 8 truncate apically (Figs 42, 43); spermatheca with pipe-shaped capsule and long stem hooked posteriorly (Fig. 21).

This species is similar externally to Atheta (Dimetrota) hampshirensis Bernhauer and Atheta (Datomicra) dadopora Thomson but differs in the shape of the spermatheca and median lobe of the aedeagus, and has a broader body than the latter species.

Distribution.

This native Nearctic species is known only from the type locality in the Yukon Territory.

Bionomics.

Adults were captured by sifting soil in a black spruce stand.