Atheta (Dimetrota) giguereae Klimaszewski & Webster

Klimaszewski, Jan, Langor, David W., Bourdon, Caroline, Gilbert, Amelie & Labrecque, Myriam, 2016, Two new species and new provincial records of aleocharine rove beetles from Newfoundland and Labrador, Canada (Coleoptera, Staphylinidae, Aleocharinae), ZooKeys 593, pp. 49-89 : 58

Taxon classification Animalia Coleoptera Staphylinidae

Atheta (Dimetrota) giguereae Klimaszewski & Webster Figs 44-51

Diagnosis.

Atheta giguereae may be distinguished by the following combination of characters: body length 2.7 mm, narrowly elongate, dark brown with paler legs and basal antennal articles, integument strongly glossy (Fig. 44); median lobe of aedeagus with bulbus narrowly oval, tubus broad, short, and rounded in dorsal view (Fig. 46), and produced ventrally and with apical part triangular in lateral view (Fig. 45); male tergite VIII truncate apically and broadly arcuate (Fig. 47); male sternite VIII almost evenly rounded apically (Fig. 48); female tergite VIII with apical margin arcuate (Fig. 49); sternite VIII broadly rounded apically (Fig. 50); spermatheca with broad pitcher-shaped capsule with large apical invagination and sinuate stem narrowly looped and twisted posteriorly (Fig. 51). For a more detailed description, see Webster et al. (2016).

Distribution.

Bionomics.

In Newfoundland, one female was collected in a pitfall trap in a mixed boreal forest in July. In New Brunswick, Atheta giguereae was found in mature and old-growth eastern white cedar swamps, a mixed forest, an old-growth northern hardwood forest, and an old white pine stand ( Webster et al. 2016). Adults were sifted from moss and leaf litter near streams and brooks and from moist moss in these forests ( Webster et al. 2016). A few individuals were captured in Lindgren funnel traps. Specimens from Nova Scotia were captured in flight intercept traps in red spruce and red spruce–hemlock forests ( Webster et al. 2016). Adults were collected from April to August.