Medon fusculus (Mannerheim, 1830)

Brunke, Adam J. & Marshall, Stephen A., 2011, Contributions to the faunistics and bionomics of Staphylinidae (Coleoptera) in northeastern North America: discoveries made through study of the University of Guelph Insect Collection, Ontario, Canada, ZooKeys 75, pp. 29-68 : 38-39

Medon fusculus (Mannerheim, 1830)

Materials.

CANADA: ON: Huron Co., Auburn, Hullett-McKillop Rd. nr. Limekiln Line, 43.742, -81.514, hedgerow, pitfall, 26-V-2010 (1) A. Brunke; Auburn, Limekiln Line, 43.736, -81.506, hedgerow, canopy trap in buckthorn, 26-V-2010 (2) A. Brunke; Benmiller, Sharpes Creek Line, 43.691, -81.608, hedgerow nr. creek, pitfall, 11-V-2009 (1) A. Brunke; Muskoka Reg., S. Waseosa Rd., 8-VII-1996 (1)W. J. Crins; Wellington Co., Guelph, 26-V-1978 (1) Ron O. Kreazer; Guelph, under rock, 16 - III-1983 (1) Brian Brown; Guelph, University Arboretum nature reserve, sifting beech litter, 3-V-2009 (4) A. Brunke and D.K.B. Cheung, sifting litter, 6-VI-2009 (1) A. Brunke; York Co., Toronto, 2-V-1959 (2) R. J. Pilfrey.

Diagnosis.

The genus Medon is in need of revision in North America, and Medon fusculus is currently recognizable in North America only from the characteristic modifications of the male seventh sternite and aedeagus (Fig. 15-16).

This exotic, Palaearctic species was first recognized in North America by Campbell and Davies (1991) from Québec but specimen data were not given and the Palearctic species had not yet been revised at that time. Herein we confirm its presence in North America based on comparisons with illustrations in Assing (2004) and newly report it from Ontario based upon specimens collected across southern Ontario as early as 1959 (Map 15). Medon fusculus is widely distributed in the Palaearctic region ( Smetana in Löbl and Smetana 2004). In North America, specimens have been sifted from deciduous litter in a small fragment of mature forest and found under a rock. Medon fusculus is a common species in its native range and typically inhabits leaf litter and compost ( Assing 2004).