Dinaraea borealis Lohse

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 : 86-87

8. Dinaraea borealis Lohse Fig. 8 a–g, 12, Map 8

Dinaraea borealis Lohse, in Lohse et al. 1990: 198 (based on a single female description).

Dinaraea borealis

HOLOTYPE

(female): CANADA, QUEBEC, Gt. Whale River, 30.VI.1949, J.R. Vockeroth, No. 20341 (CNC). Holotype examined.

Diagnosis.

Dinaraea borealis (habitus Fig. 8a) may be distinguished from congeners by the following combination of characters: body length 2.8-3.0 mm; head, pronotum and elytra slightly glossy with dense microsculpture; pronotum broadest in 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 without apical teeth (Fig. 8c); median lobe of aedeagus with straight, long tubus pointed at apex and slightly pointed ventrally (Fig. 8b); spermatheca elongate with pear-shaped capsule, and long apical invagination, stem long and looped posteriorly, with strongly swollen apical part (Fig. 8e).

Description.

Body length 2.8-3.0 mm; body variable in colour, either entirely black with brown or reddish appendages and part of elytra, or dark brown with legs, antennae (at least basally), and labial palpi appearing reddish-brown; head, pronotum and elytra slightly glossy, the latter more so, with dense microsculpture; abdominal microsculpture less dense and integument more glossy than that of pronotum and elytra; head moderately large, as broad as pronotum, genae slightly longer than eyes in dorsal view; pronotum broadest in apical third, slightly transverse, usually as long as elytra at suture; elytra transverse, truncate posteriorly; abdomen arcuate laterally. MALE (new description): tergite VIII truncate apically and without apical teeth (Fig. 8c); sternite VIII rounded apically (Fig. 8d); median lobe of aedeagus with long and straight tubus with apex pointed ventrally (Fig. 8b). FEMALE: tergite VIII concave basally and truncate apically (Fig. 8f); sternite VIII rounded apically, antecostal suture strongly sinuate (Fig. 8g); spermatheca elongate with pear-shaped capsule, and long apical invagination, stem long and looped posteriorly, with strongly swollen apical part (Figs 8e, 12).

Distribution.

This species was previously recorded only from Gt. Whale River in Quebec ( Lohse et al. 1990). Here, we provide new distribution data for New Brunswick, Quebec, and Ontario.

Collection and habitat data.

Adults were collected from March to August from: under bark of large fallen spruce in old-growth eastern white cedar forests; leaf litter under alders near a small stream in a mixed forest; and moss in a black spruce forest. Specimens were also captured in Lindgren funnel traps in an old-growth eastern white cedar forest and an old-growth white spruce and balsam fir forest.

Material examined.

CANADA, NEW BRUNSWICK: Charlotte Co., 10 km NW of New River Beach, 45.2110°N, 66.6170°W, 15-29.VI.2010, R. Webster & C. MacKay // Old-growth eastern white cedar forest, Lindgren funnel trap (LFC) 1 female; Restigouche Co., Little Tobique River near Red Brook, 47.44616°N, 67.06888°W, 24.V.2007, R.P. Webster // Old-growth eastern white cedar forest, under bark of large fallen spruce (LFC, RWC) 2 males, 2 females; Restigouche Co., MacFarlane Brook Protected Area, 47.6018°N, 67.6263°W, 25.V.2007, R.P. Webster // Old-growth eastern white cedar swamp, under bark of large fallen spruce (RWC) 1 male, 2 females; Restigouche Co., Dionne Brook P.N.A., 47.9064°N, 68.3441°W, 31. V– 15.VI.2011, M. Roy & V. Webster // Old-growth white spruce and balsam fir forest, Lindgren funnel trap (RWC) 3 males, 2 females; York Co. New Maryland, Charters Settlement, 45.8395°N, 66.7391°W, 29.III.2006, R.P. Webster // Mixed forest, under alders near small stream, in leaf litter (RWC) 1 female. QUEBEC: MRC Manic, Réservoir Outardes 4, 50.60°N, 69.37°W, 30. VII– 07.VIII.2007, Chaire Côte-Nord, J.P. Légaré, Block Abitibi Nord, Témoin 1-10 m, Piège à impact, 2007-3-1306 (LFC) 1 male; MRC Manic, Lac Lacoursière, 51.27°N, 67.99°W, 18. VI– 26.VI.2007, Chaire Côte-Nord, J.P. Légaré, Bloc Arbec, Témoin 3-10 m, Piège à impact, 2007-3-0168, CPRS 4-15 m, 2007-3-01153 (LFC) 2 females; same data except: 30.VII-07.VIII.2007, CPRS 3-10 m, 2007-3-1352 (LFC) 1 female; Lac-St-Jean, Compagnie forestière Arbec, 50°22'54"N, 70°33'29"W, 3. VI– 16.VI.2009, Annelage 2009, C. Hébert, pessière à mousses (LFC) 1 female; Lac-St-Jean, Compagnie forestière Arbec, 50°21'22"N, 70°31'17"W, 4. VI– 18.VI.2009, Annelage 2009, C. Hébert, pessière à mousses (LFC) 2 males; Lac-St-Jean, Compagnie forestière Arbec, 50°22'54"N, 70°33'29"W, 16. VI– 01.VII.2009, Annelage 2009, C. Hébert, pessière à mousses (LFC) 1 male, 2 females; Compagnie forestière Arbec, 50°22'37"N, 70°33'08"W, 17. VI– 01.VII.2009, Annelage 2009, C. Hébert, pessière à mousses (LFC) 3 males, 2 females; Lac-St-Jean, Compagnie forestière Arbec, 50°21'22"N, 70°31'17"W, 18. VI– 02.VII.2009, Annelage 2009, C. Hébert, pessière à mousses (LFC) 1 female. ONTARIO: Moosonee, 2.VII.1973, Parry & Campbell (CNC) 1 female.