Stenichnus collaris ( Mueller & Kunze, 1822)

Pentinsaari, Mikko, Anderson, Robert, Borowiec, Lech, Bouchard, Patrice, Brunke, Adam, Douglas, Hume, Smith, Andrew B. T. & Hebert, Paul D. N., 2019, DNA barcodes reveal 63 overlooked species of Canadian beetles (Insecta, Coleoptera), ZooKeys 894, pp. 53-150 : 53

Stenichnus collaris ( Mueller & Kunze, 1822) Figure 11

Distribution.

Native to the western Palaearctic region, widely distributed in Europe ( Schülke and Smetana 2015). Adventive in the Nearctic region (Ontario, Canada).

Canadian records.

Ontario: Peterborough, 31-May-2015 to 06-Jun-2015 (1 ex, CBG); Rouge National Urban Park, 03-Jun-2013 to 09-Jun-2013 (2 exx, CBG).

Diagnostic information.

Body size: 1.55-1.70 mm. Habitus as in Fig. 11A . Aedeagus as in Fig. 11B .

Bionomic notes.

Koch (1989a) reports that this species is found in moist forests, forest edges and gardens among leaves and fungi, in dead wood, and at sap flows. One of the Canadian specimens was collected with a Malaise trap on farmland, the other two with pitfall traps in grassland and a river bank.

Comments.

As the Nearctic Stenichnus fauna remains unrevised, it is only possible to associate Nearctic specimens with Palaearctic species through dissected males or barcodes. The Canadian specimens share identical barcode haplotypes with European material, and the identification was verified by examination of the male genitalia.

Figures

Figures 11, 12. 11 Stenichnus collaris (Mueller & Kunze) 11 A habitus, L. Borowiec 11 B aedeagus, dorsal view 12 Stenichnus scutellaris (Mueller & Kunze) 12 A habitus, L. Borowiec 12 B aedeagus, dorsal view. Scale bars: 0.5 mm (11 A; 12 A), 0.1 mm (11 B; 12 B).