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

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Atheta (Hydrosmectomorpha) quebecensis

new species

Atheta (Hydrosmectomorpha) quebecensis   Webster and Klimaszewski, new species

( Fig. 32–38 View Figures 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) GoogleMaps   . 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 View Figures 32–38 ); 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 View Figures 32–38 ); 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 View Figures 32–38 ); sternite VIII arcuately emarginate basally and broadly rounded apically ( Fig. 35 View Figures 32–38 ); tubus of median lobe of aedeagus in lateral view moderately wide, ventral margin curved basally, then straight to narrow, slightly curved apex ( Fig. 33 View Figures 32–38 ). Female. Apical margin of tergite VIII slightly sinuate, shallowly emarginate medially ( Fig. 36 View Figures 32–38 ); sternite VIII shallowly emarginate at base, apical margin truncate medially, rounded laterally ( Fig. 37 View Figures 32–38 ); spermatheca short, capsule club-shaped with deep apical invagination, stem narrow and straight, with spherical swelling posteriorly ( Fig. 38 View Figures 32–38 ).

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.


Reginald Webster


Departamento de Geologia, Universidad de Chile


Canadian National Collection of Insects, Arachnids, and Nematodes


National Museum of Natural History, Bulawayo