Gymnusa atra Casey, 1911

Klimaszewski, Jan, Chandler, Donald S., Davies, Anthony & Bourdon, Caroline, 2023, Aleocharine rove beetles of New Hampshire, USA: new taxa and new records (Coleoptera, Staphylinidae, Aleocharinae), Zootaxa 5364 (1), pp. 1-141 : 74

143. Gymnusa atra Casey *

(Illustrations in Klimaszewski et al. 1979, 2018, 2021), Table 1

References. Casey 1911. Klimaszewski 1979, 1982. Klimaszewski and Génier 1985. Majka and Klimaszewski 2010. Klimaszewski et al. 2011, 2018, 2020, 2021.

Distribution. Holarctic, transcontinental in Canada, recorded from A/S ( Klimaszewski et al. 2021). Canada: AB, BC, LB, MB, NB, NF, NS, NT, ON, QC, YT. USA: AK, IL, IA, MA, ME, MI, MN, NH, NY. France: St. Pierre and Miquelon. Russia (eastern). China (northeastern).

Collection and Habitat data. In NH captured in litter and taken by a FIT. Collected in April–May and September. Elsewhere found in tamarack ( Larix laricina (Du Roi)) and black spruce ( Picea mariana (Mill.) B.S.P.)) bogs, marshy pond and lake margins, cattail/ Carex marshes, and marshy margins of slow flowing rivers. Adults usually found in Carex hummocks, moist to wet Sphagnum with Carex , and in saturated marsh vegetation ( Klimaszewski et al. 2021).

Material. USA, Maine, Hancock Co.: Great Heath, Bar Harbor , 5.X.1944, A.E. Brower, on willow, 2 sex? Kennebec Co.: Winslow , 21.VII.2005, D.R. Bourque, 1 sex? Oxford Co.: Lincoln Tract Bog , 5 mi S Wilsons Mills, 15.VIII.1954, D.S. Chandler, treading, 3 sex? Massachusetts, Middlesex Co.: Groton , 13.I.2008, T. Murray, 1 sex? Spencer Circle , 1 km E West Groton, 4.VI.2020, T. Murray, UV lt., 1 sex? New Hampshire, Coos Co.: Mt. Washington, Lakes of the Clouds , 5000’, 10.IX.1987, A. Smetana ( CNC), 1 sex? Rockingham Co.: Hampton , 15.IV.1925, S.A. Shaw , sifting, 1 sex ?; 15.IV.1917, S.A. Shaw, 1 sex? Strafford Co.: 1 mi SW Durham , 12–26.V.1987, D.S. Chandler , FIT, 1 female . Canada, Ontario, Mer Bleue, 6 mi E Ottawa , sift alder leaf litter, 1 sex?; 28.X.1987, D.S. Chandler, sift grass & leaf litter, 1 sex ?