Amacylophorus caseyi, Leng, 1920

Webster, Reginald P., Smetana, Ales, Sweeney, Jon D. & DeMerchant, Ian, 2012, New Staphylinidae (Coleoptera) records with new collection data from New Brunswick and an addition to the fauna of Quebec: Staphylininae, ZooKeys 186, pp. 293-348 : 301

Acylophorus (Amacylophorus) caseyi Leng, 1920 Map 9

Material examined.

New Brunswick, Charlotte Co., Rt. 3 at Deadwater Brook, 45.4744°N, 67.1225°W, 3.VI.2005, R. P. Webster, forested black spruce bog, marshy stream margin, treading (1, RWC); near New River, 45.1616°N, 66.6649°W, 7.VII.2006, R. P. Webster, treading sedge marsh (1, NBM); near Clark Ridge, 45.3155°N, 67.4406°W, 27.V.2007, R. P. Webster, beaver pond, treading vegetation (1, NBM). Queens Co., Upper Gagetown, bog adjacent to Hwy 2, 45.8316°N, 66.2346°W, R. P. Webster, tamarack bog, in sphagnum hummock and litter at bog margin (1 ♂, 2 sex undetermined, NBM, RWC). York Co., Charters Settlement, 45.8267°N, 66.7343°W, 8.V.2004, 16.IV.2005, 30.IV.2005, 14.V.2005, R. P. Webster, Carex marsh in sphagnum hummocks (5, RWC).

Additional Maine Record.

Penobscot Co., T6 R8 WELS, Marble Fen, 46.1245°N, 68.6983°W, 13.VI.2003, P. deMaynadier and R. Webster, open wet tamarack bog, in moist sphagnum (treading) (1, NBM).

Collection and habitat data.

Smetana (1971a, 1976) reported this species from swampy and marshy areas, and along lake and bog margins. Adults occurred in wet moss, wet sphagnum, floating sphagnum mats, leaves and debris, and other floating vegetation. In Nova Scotia, adults were collected in a eutrophic, Typha latifolia L. marsh ( Smetana 1965). In New Brunswick, this species was found in marsh vegetation or saturated sphagnum hummocks along a marshy stream margin near a forested black spruce bog, a tamarack ( Larix laricina (Du Roi) Koch) bog, a beaver pond, and in Carex marshes. Most adults were collected by treading vegetation into water. Adults were collected in April, May, June, and July.

Distribution in Canada and Alaska.

ON,QC, NB, NS ( Smetana 1971a, 1973, 1976). Smetana (1990) reported Acylophorus caseyi from western Maine near the border with New Hampshire (Wilsons Mills Bog, Oxford Co.). The above record from Maine represents a significant eastern range extension in the state. It is apparent from the above records that Acylophorus caseyi probably has a more continuous distribution in the Northeast and the Maritime provinces as a whole than was suggested by the collection records reported in Majka et al. (2009). These distributional gaps likely reflect incomplete collecting effort in the appropriate wetland habitats. One must use treading to collect this species from the wetland habitats that this species usually frequents.

Figures

Map 9. Collection localities in New Brunswick, Canada and Maine, United States of America of Acylophorus caseyi.