Atheta (s. str.) aemula ( Erichson, 1839 )

Webster, Reginald, Klimaszewski, Jan, Pelletier, Georges & Savard, Karine, 2009, New Staphylinidae (Coleoptera) records with new collection data from New Brunswick, Canada. I. Aleocharinae, ZooKeys 22 (22), pp. 171-248 : 216-217

Atheta (s. str.) aemula ( Erichson, 1839)

Fig 37, Map 37

New Records. CANADA, New Brunswick, Carleton Co., Meduxnekeag River Valley Nature Preserve , 46.1931°N, 67.6825°W, 8.VI.2005 (1 ♁, 1 ♀, RWC) ; Meduxnekeag River Valley Nature Preserve, 46.1927°N, 67.6803°W, 6.VII.2006 (1 ♁, RWC) . Saint John Co. Dipper Harbour, 45.1169°N, 66.3771°W, 15.V.2006, 30.V.2006, 12.V.2008 (4 ♁, 3 ♀, NBM, RWC) . York Co., Charters Settlement , 45.8395°N, 66.7391°W, 18.IV.2004, 5.V.2004, 14.V.2005, 21.VI.2004 (1 ♁, 2 ♀, RWC) .

Map 37. Collection localities in New Brunswick, Canada of Atheta aemula .

Bionomic Notes. Atheta aemula is associated with decaying organic material in a variety of habitats. In New Brunswick, adults were collected under dog scat in a river margin (flood plain) forest, in decaying sea wrack on the upper margin of a sea beach, in compost (decaying vegetables) near a mixed forest, and on Pleurotus sp. mushroom on a dead standing trembling aspen in a mixed forest. In the United States, this species has been found in flood refuse on a river bank, in rotting wood chips, and on mushrooms ( Gusarov 2003). Adults were collected in April, May, June, and July. Collection method: sifting.

Distribution in Canada and Alaska. QC, NB ( Gusarov 2003).