Carpelimus quadripunctatus (Say, 1831)

Webster, Reginald P., Davies, Anthony E., Klimaszewski, Jan & Bourdon, Caroline, 2016, Further contributions to the staphylinid fauna of New Brunswick, Canada, and the USA, with descriptions of two new Proteinus species (Coleoptera, Staphylinidae), ZooKeys 573, pp. 31-83 : 52

Taxon classification Animalia Coleoptera Staphylinidae

Carpelimus quadripunctatus (Say, 1831) Figs 30-31

Material examined.

New Brunswick, Queens Co., Bayard near Nerepis River, 45.4442°N, 66.3292°W, 25.V.2008, R.P. Webster // Pond margin, in moist grass litter on mud (1 ♂, 1 ♀, 1 sex undetermined, RWC); Welsford near Nerepis River, 45.4441°N, 66.3300°W, 27.VI.2006, R.P. Webster, coll. // Margin of oxbow, treading emergent grass into water (1 ♂, RWC). Sunbury Co., Maugerville, Portobello Creek N.W.A., 45.8882°N, 66.4248°W, 16.VII.2004, R.P. Webster // Silver maple swamp, margin of river under litter on muddy soil (1 ♂, RWC). York Co. Fredericton at Saint John River, 45.9598°N, 66.6258°W, 4.VII.2004, 19.VII.2005, R.P. Webster // River margin under drift material (1 ♀, HNHM; 1 sex undetermined, RWC); Kingsclear, Mazerolle Settlement, 45.8729°N, 66.8311°W, 28.IV.2006, R.P. Webster, coll. // Margin of stream (sun-exposed), in fine gravel/sand near water (2 ♂, RWC); Keswick River at Rt. 105, 45.9938°N, 66.8344°W, 3.VI.2008, R.P. Webster // Silver maple swamp near river margin, in leaf and grass litter on mud/clay soil (1 ♂, 1 ♀, RWC).

Distribution in Canada and Alaska.

ON, QC, NB ( Bousquet et al. 2013).

Natural history.

This species was found on pond, stream, and river margins in moist grass litter on mud, in leaf and grass litter on mud and clay soil, under litter on muddy soil, under drift material, and in fine gravel/sand on a stream margin close to water. One individual was collected by treading emergent grass into water along the margin of an oxbow. Adults were collected during May, June, and July.