Atheta (Hydrosmectomorpha) quebecensis, Webester and Klimaszewski, 2018

Klimaszewski, Jan, Webster, Reginald P., Davies, Anthony & Bourdon, Caroline, 2018, Description of Hydrosmectomorpha Klimaszewski and Webster, a new subgenus of Atheta C. G. Thomson, with three new Canadian species (Coleoptera: Staphylinidae: Aleocharinae), Insecta Mundi 648, pp. 1-12 : 6-7

Atheta (Hydrosmectomorpha) quebecensis Webster and Klimaszewski, new species

( Fig. 32–38 )

Holotype (male). Canada, Quebec, Bellechase Co., St. Raphael at Rivière du Sud, 46.8071°N, 70.7377°W, 27.VIII.2009, R.P. Webster , coll. // river margin near waterfall, splashing exposed bedrock with moss near fast flowing water above waterfall, ( CNC) . Paratypes. Same locality data as the holotype ( RWC) 1 female.

Etymology. This species name derives from the name of the province of Quebec, where the original series was found.

Diagnosis. Body subparallel, flattened, length 3.6–3.8 mm; colour dark brown to almost black, with legs and elytra except for scutellar region paler, yellowish-brown ( Fig. 32 ); integument moderately glossy, forebody with fine, moderately dense punctation and faint meshed microsculpture; head slightly narrower than pronotum, eyes large and slightly protruding; antennae moderately robust, all antennomeres at least slightly elongate ( Fig. 32 ); pronotum subquadrate, widest at apical third (0.62 mm); elytra flat- tened, distinctly elongate and broader than pronotum (0.77 mm, at shoulders), at suture about as long as pronotum; abdomen subparallel, broadest at apical third. Male. Tergite VIII with apical margin slightly sinuate, without teeth ( Fig. 34 ); sternite VIII arcuately emarginate basally and broadly rounded apically ( Fig. 35 ); tubus of median lobe of aedeagus in lateral view moderately wide, ventral margin curved basally, then straight to narrow, slightly curved apex ( Fig. 33 ). Female. Apical margin of tergite VIII slightly sinuate, shallowly emarginate medially ( Fig. 36 ); sternite VIII shallowly emarginate at base, apical margin truncate medially, rounded laterally ( Fig. 37 ); spermatheca short, capsule club-shaped with deep apical invagination, stem narrow and straight, with spherical swelling posteriorly ( Fig. 38 ).

Distribution. Origin: Nearctic. CANADA: QC.

Habitat and collection data. Habitat. Found along margin of fast-flowing river above a waterfall. Adults were in exposed moss covered bedrock. The rarely collected Bembidion (Pseudoperyphus) rufotinctum Chaudoir (Carabidae) occurred in the same habitat. Collecting period. VIII. Collecting method. Collected by splashing exposed moss-covered bedrock in river.

Figures

Figures 32–38. Atheta (H.) quebecensis Webester and Klimaszewski, sp. nov. 32) Habitus in dorsal view. 33) Median lobe of aedeagus in lateral view. 34) Male tergite VIII. 35) Male sternite VIII. 36) Female tergite VIII. 37) Female sternite VIII. 38) Spermatheca. Scale line for habitus = 1 mm, remaining scale lines = 0.2 mm. Arrows indicate important diagnostic features.