Carpelimus elongatulus (Erichson, 1839)

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

Carpelimus elongatulus (Erichson, 1839) Figure 10

Distribution.

Native to the Palaearctic region, distributed from western Europe to the Baikal region of Russia ( Schülke 2012a). Adventive in the Nearctic region (Ontario, Quebec, and New Brunswick, Canada).

Canadian records

(DNA barcoded specimens). Ontario: Ausable-Bayfield Conservation Authority, 30-Jun-2015 (1 ex, CBG); Indian Point Provincial Park, 28-Jul-2015 (1 ex, CBG); Puslinch Township, 09-May-2010 (1 ex, CBG).

Additional Canadian records.

Ontario: Guelph, 10-Apr-2009, (2 exx, DEBU); Minesing Swamp, 26-Jan-2008 (1 ex, DEBU). Quebec: Dorval, 10-Oct-1975, (1 ex, FMNH); Sainte-Foy, 27-May-1976, (1 ex, FMNH). New Brunswick: Charlotte County, 05-Jun-2008 (1 ex, RWC); Jackson falls, 22-May-2010, (1 ex, RWC); Musquash, 07-May-2006 (1 ex, RWC).

Diagnostic information.

Body length: 2.0-2.6 mm. Habitus as in Fig. 10A . Aedeagus as in Fig. 10B .

Bionomic notes.

This species occurs on banks of waterways, wet meadows, agricultural fields and in damp leaf litter ( Schülke 2012a). The Canadian specimens were collected with Malaise traps in forests and extracted from leaf litter from a wetland and a river bank.

Comments.

As the Nearctic Carpelimus have not been revised in modern times, it is currently necessary to dissect males to match with published illustrations of the aedeagus (see Webster et al. 2016). Although only female voucher specimens from the Nearctic were available for study, they easily key to C. elongatulus in Schülke (2012a) and two of the barcoded Canadian specimens share identical haplotypes with European specimens of C. elongatulus . Similar but much smaller Palaearctic species such as C. subtilis are represented in BOLD and form separate BINs deeply divergent from C. elongatulus .

Figures

Figures 9, 10. 9 Bledius gallicus (Gravenhorst) 9 A habitus, black elytra, L. Borowiec 9 B habitus, red-brown elytra, L. Borowiec 9 C aedeagus, ventral view, VL = ventral lamella M. Schuelke 9 D male sternite VII 10 Carpelimus elongatulus (Erichson) 10 A habitus 10 B aedeagus, ventral view, H. Schillhammer. Scale bars: 1.0 mm (9 A, B; 10 A), 0.2 mm (9 C), 0.2 mm (9 D), 0.25 mm (10 B).