Myllaena procidua Casey, 1911

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 : 203-205

Myllaena procidua Casey, 1911

Figs 25, 64–66, Map 26

New Records. CANADA, New Brunswick, Carleton Co., Meduxnekeag River Valley Nature Preserve , 46.1888°N, 67.6762°W, 25.VI.2007 (1 ♀, RWC) ; Meduxnekeag River Valley Nature Preserve, 46.1942°N, 67.6832°W, 3.VII.2006, 9.VI.2008 (6 ♁, 4 ♀, 1 sex not determined, LFC, RWC) . Northumberland Co., Nelson Hollow at “Kelley Channel”, 46.5433°N, 66.1842°W, 11.VIII.2006 (1 ♀, RWC) ; Amostown at Miramichi River , 46.5339°N, 66.2095°W, 11.VIII.2006 (1 ♁, RWC) . Queens Co., Bayard at Nerepis River , 45.4426°N, 66.3280°W, 25.V.2008, 30.V.2008 (3 ♁, 2 ♀, LFC, RWC) . Restigouche Co., Jacquet River Gorge PNA at Jacquet River , 47.8197°N, 66.0835°W, 23.VI.2008 (1 ♁, NBM) . York Co., 1.5 km N of Durham Bridge at Nashwaak River , 46.1408°N, 66.6179°W, 15.VI.2008 (1 ♀, RWC) .

Bionomic Notes. In New Brunswick, adults occurred along river (clear water) margins among cobblestones set in sand and fine gravel at water’s edge, or among gravel at the edge of the water. Adults were located by turning over cobblestones and larger

28 29 30

Figures 25–30. 25 Myllaena kaskaskia 26 M. procidua 27 M. vulpina 28 Euvira micmac 29 Leptusa carolinensis 30 Neotobia alberta [25-27, apical part of abdomen removed]. Scale = 1 mm

Map 26. Collection localities in New Brunswick, Canada of Myllaena procidua .

pebbles. Little was previously known about the habitat association of this species. In New Brunswick, adults were collected during May, June, July, and August. Collection method: hand collecting (turning over cobblestones and pebbles).

Distribution in Canada and Alaska. QC, NB ( Klimaszewski 1982; Gouix and Klimaszewski 2007).

Comments. The male of M. procidua was unknown at the time of its description ( Klimaszewski 1982). A number of males of this species were captured and we illustrate for the first time the median lobe of the aedeagus in dorsal and lateral view (Figs. 64 and 65). The male median lobe of aedeagus of M. procidua is very similar to that of M. kaskaskia and M. vulpina . Th ese are shown in Figs. 61 and 62 ( M. kaskaskia ) and Figs. 67 and 68 ( M. vulpina ) for comparison. However, the shape of the female spermatheca differs significantly and is a much better diagnostic character for separation of these three species (Figs. 63, 66, and 69).