Coryphium nigrum Campbell, 1978

Webster, Reginald P., Sweeney, Jon D. & DeMerchant, Ian, 2012, New Staphylinidae (Coleoptera) records with new collection data from New Brunswick, Canada: Omaliinae, Micropeplinae, Phloeocharinae, Olisthaerinae, and Habrocerinae, ZooKeys 186, pp. 7-29 : 12

Coryphium nigrum Campbell, 1978 Map 12

Material examined.

New Brunswick, Albert Co., Caledonia Gorge P.N.A., at Canada Creek, 45.7808°N, 64.7775°W, 4.VII.2011, R. P. Webster, cold, clear, and shaded rocky brook in mixed forest, in saturated moss (1, NBM); Caledonia Gorge P.N.A. at Caledonia Creek, 45.7935°N, 64.7760°W, 1.VII.2011, R. P. Webster, shaded, rocky, cold, clear brook, splashing gravel (2, NBM). Carleton Co., Meduxnekeag Valley Nature Preserve, 46.1895°N, 67.6704°W, 13.VI.2010, 18.VI.2010, R. P. Webster, hardwood forest, margin of cold shaded spring-fed brook, splashing gravel, sand and clay mix (4 ♂, 3 ♀, NBM, RWC). Madawaska Co., Gagné Brook at First Lake, 47.6077°N, 68.2534°W, 23.VI.2010, M. Turgeon & R. Webster, northern hardwood forest, shaded brook among gravel on gravel bar, splashing and turning pebbles (1 ♂, 1 ♀, RWC); Jalbert Brook, 262 m elev., 47.6470°N, 68.3026°W, 23.VI.2010, R. P. Webster, old growth mixed forest, shaded brook, in gravel on gravel bar (3 ♂, 4 ♀, NBM, RWC).

Collection and habitat data.

In New Brunswick, Coryphium nigrum was found on margins of heavily shaded brooks, usually on a gravel, sand, and clay mix. One teneral individual was collected from saturated moss on a rock in a brook. Adults were collected either by turning pebbles and gravel or more easily by lightly splashing the brook margin. Adults were collected after they moved to the tops of the pebbles, but were often difficult to see due to the low light levels of the habitat. Nothing was previously known about the biology of this species other than that adults were collected in late March through May and in September ( Campbell 1978). Campbell (1978) suggested that adults were probably most active during spring or even late winter like other members of the tribe. In New Brunswick, adults were collected from mid to late June and early July, and were common at this time.

Distribution in Canada and Alaska.

QC, NB, NS ( Campbell and Davies 1991; CNC specimens).