Dinaraea backusensis Klimaszewski & Brunke

Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Caroline Bourdon, & Jacobs, Jenna, 2013, Review of Canadian species of the genus Dinaraea Thomson, with descriptions of six new species (Coleoptera, Staphylinidae, Aleocharinae, Athetini), ZooKeys 327, pp. 65-101 : 73-75

3. Dinaraea backusensis Klimaszewski & Brunke Fig. 3 a–g, Map 3

Dinaraea backusensis Klimaszewski & Brunke, in Brunke et al. 2012: 175.

HOLOTYPE

(male): CANADA, ONTARIO, Haldimand-Norfolk Reg., 6 km W of Saint Williams, Backus Woods, Wetland trail, sugar maple-dominated mesic forest, 42.3954°N, 80.2934°W, 2.IV.2010, A. Brunke // Accession No. 00331025 (DEBU). Holotype examined.

Diagnosis. Dinaraea backusensis (habitus Fig. 3a) may be distinguished from congeners by the following combination of characters: body length 2.4-2.6 mm; head, pronotum and elytra moderately glossy with dense microsculpture; pronotum broadest in about apical third and narrowest at base; elytra at suture as long as pronotum, with dense punctation similar to that on pronotum; antennal articles 7-10 moderately transverse; male tergite VIII with four small apical median teeth, median ones rounded (Fig. 3d); median lobe of aedeagus with straight and short tubus, narrowly rounded apically (Fig. 3b, h); spermatheca with large pear-shaped capsule and moderately shallow apical invagination, stem moderately long and looped posteriorly, apical end strongly swollen (Fig. 3c).

Description.

Body length 2.4-2.6 mm; body dark brown with legs, antennae (at least basally) and labial palpi yellowish- or reddish-brown; head, pronotum and elytra slightly glossy, with dense microsculpture; abdominal microsculpture moderately dense and integument glossy; head about as broad as pronotum, genae slightly longer than eyes in dorsal view; pronotum broadest in apical third, slightly transverse, as long as elytra at suture; elytra transverse, truncate posteriorly; abdomen arcuate laterally, broadest in middle; male tergite VIII with four small and short teeth at apical margin, all about the same size, median teeth rounded (Fig. 3d), sternite VIII slightly rounded posteriorly, antecostal suture arcuate and anterior margin concave (Fig. 3e); median lobe of aedeagus with short and straight venter of tubus and narrowly rounded apex (Fig. 3b, h); female tergite VIII broadly arcuate apically (Fig. 3f), sternite VIII rounded apically, antecostal suture arcuate (Fig. 3g); spermatheca with large pear-shaped cap sule and moderately shallow apical invagination, stem moderately long, and looped posteriorly, apical part strongly swollen (Fig. 3c).

Distribution.

Known from Ontario and New Brunswick in Canada and Massachusetts in the USA.

Collection and habitat data.

Adults were collected from March to August mostly from under the bark of rotting logs (spruce, maples) in a variety of hardwood and mixed hardwood-conifer forest types. Some adults were found in polypore fungi on a large fallen basswood ( Tilia americana L.) and in moss and litter at the base of cedar in an old-growth eastern white cedar swamp. Flying adults were also captured in Lindgren funnel traps in a red spruce forest with red maple and balsam fir ( Abies balsamea (L.) Mill.) and in an old red pine ( Pinus resinosa Ait.) forest.

Material examined.

CANADA: NEW BRUNSWICK: Albert Co., Caledonia Gorge P.N.A., 45.8175°N, 64.7770°W, 6.VII.2011, R.P. Webster // Mature hardwood forest, rotten sugar maple log, under bark (RWC) 1 male; Caledonia Gorge P.N.A., 45.7760°N, 64.7935°W, 1.VII.2011, R.P. Webster // Old-growth sugar maple & yellow birch forest, under bark of sugar maple log (NBM) 1 male; Caledonia Gorge P.N.A., 45.8380°N, 64.8484°W, 3.VII.2011, R.P. Webster // Old-growth sugar maple & yellow birch forest, under bark of sugar maple log (NBM) 1 male; Carleton Co., Jackson Falls, "Bell Forest Preserve", 46.2200°N, 67.7231°W, 13.VIII.2006, R.P. Webster // Hardwood forest, on slightly dried Pleurotus sp., on dead standing maple (RWC) 1 female; Carleton Co., Jackson Falls, "Bell Forest Nature Preserve", 46.2199°N, 67.7231°W, 7.VI.2007, R.P. Webster // Rich Appalachian hardwood forest, in polypore fungi on large fallen basswood (RWC) 1 male; Charlotte Co., 5 km NW of Pomeroy Ridge, 45.3059°N, 67.4343°W, 5.VI.2008, R.P. Webster // Red maple and eastern white cedar swamp, under bark of red maple (RWC) 1 female; Sunbury Co., Acadia Research Forest, 46.0188°N, 66.7450°W, 17.VIII.2007, R.P. Webster // Road 16 Control, Mature red spruce & red maple forest, under bark of red maple (RWC) 1 female; Sunbury Co., Acadia Research Forest, 45.9866°N, 66.3841°W, 24-30.VI.2009, R. Webster & M.-A. Giguère // Red spruce forest with red maple & balsam fir, Lindgren funnel trap (RWC) 1 male; York Co., New Maryland, Charters Settlement, 45.8342°N, 66.7452°W, 23.IV.2004, R.P. Webster (LFC) 1 male; York Co., New Maryland, Charters Settlement, 45.8340°N, 66.7450°W, 27.IV.2005, R.P. Webster // Mixed forest, in wood pile, under bark of spruce (RWC, LFC) 2 males, 1 female; York Co., New Maryland, Charters Settlement, 45.8395°N, 66.7391°W, 1.V.2004, R.P. Webster // Mixed forest, under bark of conifer log (RWC) 1 female; York Co., New Maryland, 45.8395°N, 66.7391°W, 6.VI.2006, R.P. Webster // Mixed forest, in fungus covered log (punky wood) (RWC) 1 female; York Co., New Maryland, 45.8395°N, 66.7391°W, 18.VI.2008, R.P. Webster // Mixed forest, in rotten log (RWC) 1 female; York Co., New Maryland, off Hwy 2, E of Baker Brook, 45.8760°N, 66.6252°W, 6.IV.2005, R.P. Webster // Old growth cedar swamp, in moss & litter at base of cedar (RWC) 1 male; York Co., 15 km E of Tracy, off Rt. 645, 45.6848°N, 66.8821°W, 4-16.VI.2010, R. Webster & C. MacKay // Old red pine forest, Lindgren funnel trap (RWC) 1 male; York Co., 14 km WSW of Tracy, S of Rt. 645, 45.6741°N, 66.8661°W, 9.VI.2010, R.P. Webster // Old mixed forest, under bark of rotten red maple log (RWC) 1 male. USA: MASSACHUSETTS: Framingham, 10.III.1947, C.A. Frost (CNC) 1 female.