Dinaraea longipenis Klimaszewski & Webster

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 : 90-93

10. Dinaraea longipenis Klimaszewski & Webster sp. n. Fig. 10 a–d, Map 10

HOLOTYPE

(male): CANADA, NEW BRUNSWICK: York Co., New Maryland, Charters Settlement, 45.8267°N, 66.7343°W, 3.V.2006, R.P. Webster // Carex marsh, treading, sp. # 444 (LFC). PARATYPE: CANADA, NEW BRUNSWICK: Restigouche Co., Jacquet River Gorge P.N.A., 47.7491°N, 66.1114°W, 24.VI.2008, R.P. Webster // Hardwood forest, in well-rotted log (RWC) 1 male.

Etymology.

Longipenis means 'possessing a long penis’, in allusion to the long tubus of the median lobe of the aedeagus in this species.

Diagnosis.

Dinaraea longipenis (habitus Fig. 10a) may be distinguished from congeners by the following combination of characters: body length 3.5 mm; head, pronotum and elytra slightly glossy with dense microsculpture; pronotum broadest in the middle and narrowest at base; elytra at suture shorter than pronotum, with dense punctation similar to that on pronotum; antennal articles 7-10 strongly transverse; male tergite VIII without apical teeth (Fig. 10c); median lobe of aedeagus with straight, long tubus rounded at apex and slightly pointed ventrally (Fig. 10b), internal sac with thin sclerites (Fig. 10b). FEMALE: We have one female from New Brunswick found without male association that may belong to this species. This female is externally very similar to the male of Dinaraea longipenis but the spermatheca and tergite and sternite VIII are indistinguishable from that of Dinaraea piceana . We need more specimens of this species, with male and female association, to confirm and formally describe the female of this species.

Description.

Body length 3.5 mm; body dark black with light reddish-brown tarsi, tibia and bases of antennae; head, pronotum and elytra slightly glossy, the elytra more so, with dense microsculpture; abdominal microsculpture less dense and integument more glossy than that of pronotum and elytra; head large, about as broad as pronotum, genae slightly longer than eyes in dorsal view; pronotum broadest in middle, slightly transverse, longer than elytra at suture; elytra transverse, truncate posteriorly; abdomen arcuate laterally; male tergite VIII truncate apically and without apical teeth, slightly angular laterally at apical margin (Fig. 10c), sternite VIII rounded apically (Fig. 10d); median lobe of aedeagus with long and straight tubus with apex rounded and pointed ventrally (Fig. 10b). Female undescribed (see above).

Distribution.

This species is known only from New Brunswick.

Collection and habitat data.

The holotype was captured during May in a Carex marsh by treading emergent vegetation. The paratype was collected from a well-rotted log in a hardwood forest.