Review of Canadian species of the genus Mocyta Mulsant & Rey (Coleoptera, Staphylinidae, Aleocharinae), with the description of a new species and a new synonymy Author Klimaszewski, Jan Author Webster, Reginald P. Author Bourdon, Caroline Author Pelletier, Georges Author Godin, Benoit Author Langor, David W. text ZooKeys 2015 487 111 139 http://dx.doi.org/10.3897/zookeys.487.9151 journal article http://dx.doi.org/10.3897/zookeys.487.9151 1313-2970-487-111 1B03F7CD1A5844F68ADD209E7D34BB2D 1B03F7CD1A5844F68ADD209E7D34BB2D Taxon classification Animalia Coleoptera Staphylinidae 6. Mocyta sphagnorum Klimaszewski & Webster sp. n. Figs 8 a-h , Map 3 Holotype (female). CANADA, New Brunswick, Restigouche Co., Berry Brook Protected Area, 47.81399°N , 66.75778°W , 26.V.2007, old-growth eastern white cedar swamp, in moss near brook, R.P. Webster (LFC). Paratypes. CANADA: Newfoundland: R.A. Squires Prov. Pk., 23.VII.1970, D.E. Bright (CNC) 1 male. New Brunswick, Charlotte Co., Hwy 3 at Deadwater Brook , 45.4745°N , 67.1225°W , 23.IV.2006, Black spruce forest in Sphagnum , R.P. Webster (LFC) 1 male, 1 female; Hwy 3 at Deadwater Brook, 45.4745°N , 67.1225°W , 23.IV.2006, Black spruce forest, in sphagnum, R.P. Webster, (RWC) 3 males, 1 female; Carleton Co., Wakefield, Meduxnekeag Valley Nature Preserve, 46.1935°N , 67.8825°W , 19.IV.2005, mixed forest in moist moss, R. Webster (RWC) 1 female; Belleville, Meduxnekeag Valley Nature Preserve, 46.1907°N , 67.6740°W , 4.V.2006, conifer forest area, in moldy conifer duff at base of large white pine, R.P. Webster (RWC) 1 female; "Two Mile Brook Fen", 46.3619°N , 67.6733°W , 5.VIII.2004, calcareous fen, in sphagnum moss & litter, J. Edsall & R. Webster (RWC) 1 sex undetermined; Restigouche Co., Berry Brook P.N.A., 47.81399°N , 66.75778°W , 26.V.2007, R.P. Webster // Old-growth eastern white cedar swamp, in moss near brook (RWC) 1 male. Ontario: 52 mi N Hurkett, Black Sturgeon Lake, 28.VI.1973, R. Parry and J.M. Campbell (LFC) 1 male; Mt. Tremblant Pk., 27.VI.1971, E.J. Kiteley (LFC) 1 female. Quebec: Gaspe Co., Mt-Albert, Sommet nord, 1000 m, 18.Vii.1985, sweeping field, F. Genier (LFC) 1 male. Non-types. Canada, New Brunswick: York Co., Canterbury Brown's Mtn. Fen., 45.8965°N , 67.6344°W , 5.VIII.2004, mixed forest on decaying fungi, J. Ed sall and R. Webster (LFC) 1 sex unknown. Quebec: Gaspe Co., Mt-Jacques-Cartier, 24.VII.1985, caribou dung, F. Genier and J. Klimaszewski (LFC) 1 male. Etymology. The specific name sphagnorum is an adjective, which derives from the generic name of Sphagnum , in the genitive plural, meaning "of the Sphagnum plant", a dominant plant of the habitat where the species was found. Diagnosis. Body narrowly oval (Fig. 8a), length 2.4-2.7 mm; uniformly brown to almost black, legs and palps yellowish to reddish-brown and antennae uniformly light brown to brown; antennal articles I-IV elongate and V-X variable in length from subquadrate to slightly transverse (Figs 8a, e); pronotum transverse, variable in width, from slightly-to-distinctly broader than elytra [pronotum usually broader in females than in males, Fig. 8e], strongly rounded laterally, and arcuate basally; elytra transverse and slightly shorter than pronotum; abdomen broadly arcuate laterally and with strong macrosetae apically. MALE: median lobe of aedeagus as illustrated with distinct apical structures of median lobe (Fig. 8b); tergite VIII truncate apically (Fig. 8c); sternite VIII slightly produced and rounded apically and with numerous strong macrosetae in apical part of disc, space between base of disc and antecostal suture narrow, antecostal suture arcuate (Fig. 8d). FEMALE: spermatheca pear-shaped with small and shallow apical invagination, stem thin and irregularly coiled posteriorly (Fig. 8f); tergite and sternite VIII truncate apically (Figs 8g, h). Figures 8 a-h . Mocyta sphagnorum sp. n.: 8a male habitus in dorsal view 8b median lobe of aedeagus in lateral view 8c male tergite VIII 8d male sternite VIII 8e female habitus in dorsal view 8f spermatheca 8g female tergite VIII 8h female sternite VIII. Scale bar for habitus = 1 mm, and the remaining scale bars = 0.2 mm. This species may be distinguishable from other Mocyta species by its large and dark brown to black pronotum, shape of spermatheca and apical structures of internal sac. Distribution. This nearctic species is known from Newfoundland, New Brunswick, Quebec and Ontario. Natural history. In New Brunswick, adults were found in sphagnum moss and litter in calcareous eastern white cedar fens and in a black spruce forest. One individual was collected from moldy conifer duff at the base of a large pine in a mixed forest. Adults were found in April and May in New Brunswick, and June to August elsewhere. This species seems to be associated with moist sphagnum moss. Figures 9 a-g . Mocyta givicollis (Scheerpeltz) [images based on Types, Austria] (= Mocyta negligens ): 9a habitus in dorsal view 9b median lobe of aedeagus in lateral view 9c male tergite VIII 9d male sternite VIII 9e spermatheca in lateral view 9f female tergite VIII 9g female sternite VIII. Broken line indicates original border of bulbus which was distorted during preparations. Scale bar for habitus = 1 mm, and the remaining scale bars = 0.2 mm. Figures 10-14. Mocyta negligens Mulsant & Rey (= Mocyta givicollis ) [habitus images in dorsal view, based on types, France]: 10 lectotype 11 paralectotype 1 12 paralectotype 2 13 paralectotype 3 14 paralectotype 4 [abdomen]. Scale bar for habitus = 1 mm.