Dinaraea worki Klimaszewski & Jacobs

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 : 76-78

4. Dinaraea worki Klimaszewski & Jacobs sp. n. Fig. 4 a–g, Map 4

HOLOTYPE

(male): CANADA, QUEBEC, Villebois, Picea mariana , coll. J. Jacobs, 2008, DB-ID 2913 (LFC). PARATYPES: CANADA, QUEBEC: Villebois, Picea mariana , coll. J. Jacobs, 2008, DB-ID 305 (LFC) 1 female; same data except: DB-ID 490 (LFC) 1 female; DB-ID 2749 (LFC) 1 female; DB-ID 2758 (LFC) 1 female; DB-ID 2765 (LFC) 1 female; DB-ID 2768 (LFC) 1 female; DB-ID 2770 (LFC) 1 female; DB-ID 2778 (LFC) 1 female; DB-ID 2780 (LFC) 1 female; DB-ID 2918 (LFC) 1 male; DB-ID 2994 (LFC) 1 female; Quebec, Sept Iles, 2.XI.1985 (LFC) 5 males, 7 females. NON-TYPES: CANADA, QUEBEC: Lac-St-Jean, Compagnie forestière Arbec, 50°22'54"N, 70°33'29"W, 12. VIII– 25.VIII.2009, Annelage 2009, C. Hébert, pessière à mousses (LFC) 1 female; Lac-St-Jean, Compagnie forestière Arbec, 50°22'06"N, 70°33'22"W, 17. VI– 01.VII.2009, Annelage 2009, C. Hébert, pessière à mousses (LFC) 1 female [last two females have slightly damaged spermathecae].

Etymology.

Named for Dr. Timothy Work, Université du Québec à Montréal, Quebec, Canada, who provided many insect specimens for this study and who has advanced the ecological knowledge of epigaeic beetles in Canada.

Diagnosis.

Dinaraea worki (habitus Fig. 4a) may be distinguished from congeners by the following combination of characters: body length 2.3-2.6 mm; head, pronotum and elytra moderately glossy with moderately dense microsculpture; pronotum broadest in middle and narrowest at base; elytra at suture as long as pronotum, with dense punctation similar to that on pronotum; antennal articles 7-10 strongly transverse; male tergite VIII with four small apical teeth, all short and rounded (Fig. 4c); median lobe of aedeagus with straight and short tubus narrowly rounded apically (Fig. 4b); spermatheca with large pear-shaped capsule and long apical invagination, stem short and looped posteriorly, with slightly swollen apical part (Fig. 4e).

Description.

Body length 2.3-2.6 mm; body dark brown with legs, antennae (at least basally), labial palpi and posterior part of elytra yellowish- or reddish-brown; head, pronotum and elytra moderately glossy, with moderately dense microsculpture; abdominal microsculpture moderately dense and integument more glossy; head about as broad as pronotum, genae slightly longer than eyes in dorsal view; pronotum broadest in middle, slightly transverse, about as long as elytra at suture; elytra transverse, truncate posteriorly; abdomen arcuate laterally, broadest in middle; male tergite VIII with four small rounded teeth at apical margin (Fig. 4c), sternite VIII rounded poste riorly, antecostal suture arcuate and anterior margin broadly arcuate (Fig. 4d); median lobe of aedeagus with short and straight venter of tubus and narrowly rounded apex (Fig. 4b); female tergite VIII slightly sinuate apically on each side of disc (Fig. 4f), sternite VIII rounded apically, antecostal suture sinuate (Fig. 4g); spermatheca with large pear-shaped capsule, and long apical invagination, stem short and looped posteriorly, with slightly swollen apical part (Fig. 4e).

Distribution.

Known from Quebec.

Collection and habitat data.

Several adults were collected in November. Specimens from western Quebec were collected from dead and decaying black spruce ( Picea mariana Mill. (BSP)) in a boreal forest dominated by black spruce.