Difference between revisions of "Ocyusa canadensis"

Latest revision as of 12:25, 30 May 2014

Taxonavigation

Ordo: Coleoptera
Familia: Staphylinidae
Genus: Ocyusa

Name

Ocyusa canadensis Lohse – Wikispecies link – Pensoft Profile

• Ocyusa canadensis Lohse, in Lohse et al. 1990^[1]: 147; Brunke et al. 2012^[2]: 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^[2]), 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.

Taxon Treatment

• Klimaszewski, J; Webster, R; Langor, D; Bourdon, C; Hammond, H; Pohl, G; Godin, B; 2014: Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae) ZooKeys, 412: 9-40. doi

Other References

1. ↑ Lohse G, Klimaszewski J, Smetana A (1990) Revision of Arctic Aleocharinae of North America (Coleoptera: Staphylinidae). The Coleopterists Bulletin 44: 121–202.
2. ↑ ^{2.0 2.1} Brunke A, Klimaszewski J, Dorval J, Bourdon C, Paiero S, Marshall S (2012) New species and distributional records of Aleocharinae (Coleoptera, Staphylinidae) from Ontario, Canada, with a checklist of recorded species. ZooKeys 186: 119–206. doi: 10.3897/zookeys.186.2947

Images

Maps 3–4.  Figure 8. Ocyusa canadensis Lohse: 8a habitus 8b median lobe of aedeagus in lateral view 8c male tergite VIII 8d male sternite VIII 8e spermatheca in lateral view 8f female tergite VIII 8g female sternite VIII 8h left mandible 8i right mandible 8j labrum 8k maxilla 8l menthum, labial palpi and ligula. Habitus scale bar = 1.0 mm; other scale bars = 0.2 mm.