Microrhagus triangularis (Say, 1823)

Webster, Reginald P., Sweeney, Jon D. & DeMerchant, Ian, 2012, New Coleoptera records from New Brunswick, Canada: Eucnemidae, ZooKeys 179, pp. 77-91 : 82

Microrhagus triangularis (Say, 1823) Map 4

Material examined.

New Brunswick, Carleton Co., Jackson Falls, Bell Forest, 46.2200°N, 67.7231°W, 28. VII– 6.VIII.2008, R. P. Webster, mature hardwood forest, Lindgren funnel traps (2, RWC). Charlotte Co., 10 km NW of New River Beach, 45.2110°N, 66.6170°W, 29. VI– 16.VII.2010, R. Webster & C. MacKay, old growth eastern white cedar forest, Lindgren funnel trap (1, AFC). York Co., Charters Settlement, 45.8430°N, 66.7275°W, 20.VII.2008, R. P. Webster, regenerating mixed forest, beating foliage (1, RWC); 15 km W of Tracy off Rt. 645, 45.6848°N, 66.8821°W, 30. VI– 13.VII.2010, 12-27.VII.2010, R. Webster & C. MacKay, old red pine forest, Lindgren funnel traps (3, AFC).

Collection and habitat data.

Adults of Microrhagus triangularis were reported from Cornus logs, otherwise little is known about the biology and habitat requirements of this species ( Muona 2000). Levesque and Levesque (1993) collected two specimens in Québec at the boundary between a raspberry plantation and a white pine woodland. In New Brunswick, adults of this common species were found in a mature hardwood forest with beech, sugar maple, and ash, an old red oak forest, an old-growth eastern white cedar forest, and an old red pine forest. Most adults were captured in Lindgren funnel traps. One individual was collected by beating foliage in a regenerating mixed forest. Adults were collected during July and August.

Distribution in Canada and Alaska.

ON, QC, NB, NS ( Bousquet 1991; Majka 2007).