Brachyusa helenae (Casey 1911)**

Webster, Reginald P., Klimaszewski, Jan, 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, Canada: Aleocharinae, ZooKeys 186, pp. 83-118 : 86

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Brachyusa helenae (Casey 1911)**


Brachyusa helenae (Casey 1911)** Map 5 View Map 5. illustrations in Klimaszewski et al. (2011)

Material examined.

New Brunswick, Carleton Co., Jackson’s Falls, 46.2257°N, 67.7437°W, 12.IX.2009, R. P. Webster coll., river margin near waterfall, splashing moss near splash zone of waterfall (10 ♂, 8 ♀, RWC, LFC); Gloucester Co., Bathurst, Daly Point Reserve, 27.VII.2009, R. P. Webster, sea beach, in seepage area (fresh water) (1 ♀, LFC). Madawaska Co., Third Lake, 47.7786°N, 68.3783°W, 21.VI.2010, R. P. Webster, partially shaded brook, gravel/clay margin, under alders (splashing & turning gravel) (1 ♂, LFC); Gagné Brook at First Lake Rd., 47.6077°N, 68.2534°W, 23.VI.2010, M. Turgeon & R. P. Webster, northern hardwood forest, shaded brook, among gravel on gravel bars, splashing & turning gravel (1 ♂, LFC). Restigouche Co., Jacquet River Gorge P.N.A., 47.8256°N, 66.0770°W, 13.VIII.2010, R. P. Webster, large shaded brook among cobblestones (1, sex undetermined, NBM); same locality and collector except 47.7765°N, 66.1277°W, 13.VIII.2010, Jacquet River, among moss on rocks in middle of river, collected by splashing rocks (1 ♀, RWC); Wild Goose Lake, 420 m elev., 47.8540°N, 68.3219°W, 7.VI.2011, R. P. Webster & M. Turgeon, lake margin with emergent Carex & grasses, treading Carex & grasses (1 sex undetermined, LFC). York Co., Keswick River at Rt. 105, 45.9938°N, 66.8344°W, 3.VI.2008, R.P. Webster coll., upper river margin, in flood debris on sand/clay mix (2 ♀, RWC); Keswick River at Rt. 105, 45.9920°N, 66.8334°W, 9.VII.2009, silver maple swamp, margin of vernal pond, splashing (1 ♀, NBM); Charters Settlement, 45.8391°N, 66.7345°W, 25.IV.2010, R. P. Webster, beaver dam, in debris near outflow from dam (1 sex undetermined, LFC).

Collection and habitat data.

In New Brunswick, most adults of Brachyusa helenae were found near flowing water. Many specimens were collected frommoss near the splash zone of a waterfall. It took 5-10 min. before adults appeared after repeated splashing. Other individuals were collected from moss on rocks in the middle of a river, from gravel on a gravel bar along a shaded brook, from gravel on a gravel/clay margin of a partially shaded brook, from among cobblestones along a large shaded brook, and in flood debris resting on a sand/clay mix along an upper river margin. Most individuals from these habitats were collected by splashing water on moss and gravel, or turning gravel. A few specimens were collected by treading emergent Carex and grasses on the margin of a lake near the outflow of a stream and by splashing water on debris on the margin of a vernal pond in a silver maple ( Acer saccharinum L.) swamp near a river. One individual was sifted from debris on a beaver ( Castor canadensis Kuhl) dam near the outflow area (flowing water) from the dam. Adults from New Brunswick were collected during April, June, July, August, and September. In Labrador, adults were captured in July and August on sand and gravel on the banks of the Churchill River ( Klimaszewski et al. 2011). Elsewhere, adults were collected near lake and river shorelines, on clay, sand and gravel beaches, and silty river margins ( Klimaszewski et al. 2011).

Distribution in Canada and Alaska.

AK, NT, NB, LB, NF ( Klimaszewski et al. 2011).