Hydrosmecta C. G. Thomson, 1858

Klimaszewski, Jan, Webster, Reginald P. & Davies, Anthony, 2017, Genus Hydrosmecta C. G. Thomson: a review of species occurring in eastern Canada (Coleoptera, Staphylinidae, Aleocharinae), Insecta Mundi 2017 (593), pp. 1-17 : 3

Genus Hydrosmecta C. G. Thomson, 1858

( Seevers 1978; Lohse et al. 1990; Ashe 2000)

Diagnosis. Body length 1.4–3.0 mm; slender, narrow, parallel-sided, subdepressed; light to dark brown; antennae long, reaching pronotal base or slightly shorter, antennomeres VI–X elongate or may be subquadrate to slightly transverse in some; head subquadrate with moderate to large eyes, postocular area long; pronotum about as wide as elytra, subquadrate to transverse, pubescence directed latero-craniad and latero-caudad from median line of disc; elytra flattened, elongate, at suture as long as or distinctly longer than pronotum, shoulders angular, pubescence directed straight or obliquely latero-caudad; abdomen subparallel; mesocoxae contiguous; meso- and metaventrite process short; tergite VII distinctly longer than VI; tubus of median lobe of aedeagus simple or with narrow basal process, athetine bridge narrow, bulbus large, with crista apicalis on triangularly shaped projection; spermatheca either S-shaped or irregularly twisted, capsule spherical, stem elongate and coiled or twisted posteriorly. Riparian species associated with gravel and sand along stream margins.