Hydrosmecta minutissimoides Webster and Klimaszewski 2017, new species

Hydrosmecta minutissimoides Webster and Klimaszewski, new species (Fig. 32–38) Holotype (male): Canada, New Brunswick, Queens Co., Bayard, at Nerepis River, 45.4426°N, 66.3280°W, 25.V.2008, R. P. Webster // river margin, in moist gravel (CNCI). Paratype (female): Canada, New Brunswick, New Maryland, Charters Settlement, 45.8395°N, 66.7391°W, 20. VII.2006, R.P. Webster // mixed forest, MV light (RWC). Etymology. The species name minutissimoides is derived from a Latin adjective meaning ‘the smallest’, referring to the fact that this is the smallest species of Hydrosmecta. Diagnosis. Body length 1.5–1.6 mm; subparallel, flattened, light brown with head and abdomen dark brown, legs and basal antennomeres yellow (Fig. 32); moderately glossy, with fine and dense punctation and pubescence; faint meshed microsculpture present on forebody; head large, as wide as pronotum, postocular area about twice as long as eye in dorsal view, posterior angles rounded; eyes moderately large; antennae moderately long, reaching two-thirds of length of elytra, antennomeres I–II distinctly elongate, III moderately elongate, IV subquadrate, V–X slightly transverse, XI clearly shorter than two preceding antennomeres combined; pronotum transverse, widest in apical third, as wide as head and elytra, slightly depressed medially; elytra elongate and flattened, at suture about one-fourth longer than pronotum; abdomen subparallel, slightly narrowed apically. Male: tergite VIII broadly truncate apically (Fig. 34); sternite VIII longer than wide, with apical margin truncate in middle third, rounded laterally, antecostal suture widely separated from basal margin (Fig. 35); median lobe of aedeagus with large bulbus, tubus strongly narrowly produced, triangular, arcuate ventrally in lateral view (Fig. 33). Female: tergite VIII slightly, very broadly emarginate apically (Fig. 36); sternite VIII with apical margin broadly truncate, laterally rounded (Fig. 37); spermatheca S-shaped, capsule short, spherical, with large apical invagination, stem sinuate and broadly looped and twisted posteriorly (Fig. 38). Distribution. Origin: Nearctic. Canada: NB. USA: not recorded. Collection and habitat data. Habitat: One specimen collected at MV light in a mixed forest; the other was found in moist gravel on a river margin (Fig. 48). Collecting period: V, VII. Collecting method: examining moist gravel and collecting at a MV light.

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