Ocyusa canadensis Lohse

Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R. & Godin, Benoit, 2014, Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae), ZooKeys 412, pp. 9-40 : 28-30

1. Ocyusa canadensis Lohse Figure 8 a–l, Map 4

Ocyusa canadensis Lohse, in Lohse et al. 1990: 147; Brunke et al. 2012: 134.

Diagnosis.

Body length 2.5-3.0 mm, narrowly elongate and broadest at elytra; body colour dark brown to almost black, with tarsi, two basal antennal articles and tibiae rust-brown, rest of antennal articles brown; forebody with dense microsculpture, moderate punctation and pubescence, and strongly glossy; head round and narrower than pronotum; pronotum transverse, rectangular in shape with sides strongly arcuate, and narrower than elytra; elytra at suture about as long as pronotum (Fig. 8a); abdomen broadly arcuate laterally, slightly narrower than elytra and with basal impressions on first three visible tergites; antennae with articles V-X subquadrate to slightly elongate (Fig. 8a). MALE: male tergite VIII broadly rounded apically (Fig. 8c); sternite VIII rounded apically (Fig. 8d); median lobe of aedeagus with tubus strongly bent ventrally and with pronounced structures of internal sac (Fig. 8b). FEMALE: tergite VIII truncate apically (Fig. 8f); sternite VIII rounded apically (Fig. 8g); spermatheca with semi-spherical capsule with long invagination, and S-shaped broad stem (Fig. 8e).

Distribution.

This native Nearctic species is known from Alaska, Yukon Territory and Ontario ( Brunke et al. 2012), and is here newly reported from the island of Newfoundland and New Brunswick [new provincial records] (Map 4).

Bionomics.

Some adults were collected from June to July at lake margins, on moist soil/gravel among sedges and by treading Carex and grasses.

Locality data.

CANADA: Newfoundland: George’s Lake, Corner Brook, 29.VII.1972, J.M. Campbell (CNC) 1 male; New Brunswick: Restigouche Co., Wild Goose Lake, 419 m elevation, 47.8540°N, 68.3200°W, 21.VII.2010 // lake margin, on moist soil/gravel among sedges, R.P. Webster (RWC) 1 female; same data except: 420 m elevation, 47.8543°N, 68.3219°W, 7.VI.2011 // lake margin with emergent Carex and grasses, treading Carex and grasses, R.P. Webster (RWC) 1 male; same data except 20.VI.2011, (RWC) 2 males, 4 females. Ontario: Timiskaming Distr., 52 km South Armstrong, 27.VI.1973, R. Parry and J.M. Campbell (CNC) 4 females, 7 sex undetermined; 52 km S Armstrong, 27.VI.1973, R. Parry and J.M. Campbell (CNC) 1 female. Yukon Territory: Dempster Hwy., mi. 122, 20.VII.1978, 2000 feet, A. Smetana and J.M. Campbell (CNC) 2 males, holotype and paratype; Dempster Hwy., mi. 147, 1900 feet, 22.VII.1978, J.M. Campbell and A. Smetana (CNC) 1 sex undetermined.

UNITED STATES OF AMERICA: Alaska: Prudhoe Bay Rd., Bonanza Creek, 900 feet, 66°40'N, 150°40'W, 2.VII.1978, A. Smetana and J.M. Campbell (CNC) 1 paratype sex undetermined; Nutirwick Creek, 67°55'N, 149°45'W, 2300 feet, 8.VII.1978, J.M. Campbell and A. Smetana (CNC) 2 sex undetermined.