Mniusa yukonensis Klimaszewski & Godin

Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R. & Godin, Benoit, 2014, Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae), ZooKeys 412, pp. 9-40 : 23

2. Mniusa yukonensis Klimaszewski & Godin Figure 6 a–l, Map 6

Ocyusa yukonensis Klimaszewski & Godin, in Klimaszewski et al. 2012: 218.

Diagnosis.

Body length 2.8-3.0 mm, narrowly elongate and broadest at elytra; body dark brown to almost black, sometimes with reddish tinge on elytra, reddish-brown antennae and legs; forebody with dense microsculpture, dense punctation and pubescence, and strongly glossy; head round and narrower than pronotum; pronotum transverse, with sides strongly arcuate and narrowed anteriad, slightly narrower than elytra; elytra at suture about as long as pronotum or slightly longer (Fig. 6a); abdomen broadly arcuate laterally, slightly narrower than elytra and with basal impressions on first three visible tergites; antennal articles V-X slightly transverse (Fig. 6a). MALE: male tergite VIII truncate apically (Fig. 6c); sternite VIII rounded apically and slightly produced medially (Fig. 6d); median lobe of aedeagus with tubus straight and slightly produced ventrally and with complex structures of internal sac (Fig. 6b). FEMALE: tergite VIII truncate apically with slightly acute lateral angles (Fig. 6f); sternite VIII rounded apically and slightly produced apically (Fig. 6g); spermatheca with narrowly elongate sac-shaped capsule connected with L-shaped neck and narrow and long stem (Fig. 6e).

Distribution.

This native Nearctic species was recently described from the Yukon Territory ( Klimaszewski et al. 2012), and is here newly reported from Nova Scotia, New Brunswick, Quebec, and British Columbia, which constitute new provincial records (Map 6).

Bionomics.

Adults were collected from May to July in pitfall traps, flight intercept traps, and Lindgren funnel traps in various forest types: rich Appalachian hardwood forest with some conifers, old-growth white spruce/balsam fir forest, balsam fir and maple sugar stands, mature white spruce with feather moss, and a red spruce forest.

Locality data.

CANADA: Nova Scotia: Colchester Co., Debert, 6.V.1993, J. Ogden (NSPM) 1 male; Black Duck Lake, NS, 22.VI.2003, 4U: Funnel 16: 844 WPi/RSp (40-80 y), P. Dollin (NSPM) 1 male. New Brunswick: Carleton Co., Jackson Falls, "Bell Forest", 46.2200°N, 67.7231°W, 4-12.VI.2008//, Rich Appalachian hardwood forest with some conifers, Lindgren funnel traps, R.P. Webster (RWC) 1 male, 2 females; same data except 12-19.VI.2008 (RWC) 1 female; same data except 19 -27.VI.2008 (RWC) 1 female: same data except 26. V– 1.VI.2009, R. Webster & M.-A. Giguère (RWC) 1 male; Restigouche Co., Dionne Brook P.N.A., 47.9064°N, 68.3441°W, 31. V– 15.VI.2011 // old-growth white spruce and balsam fir forest, flight intercept trap, M. Roy & V. Webster (RWC) 1 male; same data except 31. V– 1.VI.2011, Lindgren funnel trap (RWC) 3 males; same data except 15-27.VI.2011, Lindgren funnel trap (RWC) 1 female; same data except 21. VI– 14.VII,2011, Lindgren funnel trap (RWC) 1 female. Quebec: Dosquet Co., Lotb. Quebec, 27.IV.1984, Claude Chantal (LFC) 1 male; Pelegrin, North of Chandler, 48°32'N, 64°54'W, SAP Lindgren, 21.06.1994 (LFC) 1 male; Tremblant, SAP Lindgren, 28.VI.1994 (LFC) 1 female; La Tuque, SAP Lindgren, 11.VII.1994 (LFC) 1 female; St-Jacques-de-Leeds, Sapinière Quebec, 31.V.1993, 9.VI.1993, 16.VI.1993, 28.VI.1993, 30.VI.1993, Lindgren 1, 2, 4 (LFC) 6 females. British Columbia: 25 km SW Campbell River, 49°50'21"N, 125°28'34"W, 23.V-6.VI.1996, Balsam Cr. LT 5-D 10, J. Lemieux (LFC) 4 males, 1 female, 1 sex undetermined; Copper River Valley, A36435/04-1-1, 07.VI-6.VII.1996, pitfall trap, J. Lemieux (LFC) 1 male. Yukon Territory: EMAN Plot (Ecological Monitoring and Assessment Network), mature white spruce and feather moss forest, 60.5963°N, 134.9522°W, 8.VII.2003, 738 m, yellow pitfall trap (LMKM31Y), (LFC) 1 male [holotype]; EMAN Plot, 60.5963°N, 134.9522°W, 24.VII.2003, 738 m, black pitfall trap (LMKM31B), (ECW) 1 male [paratype].