Clambus simsoni Blackburn, 1902

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

Clambus simsoni Blackburn, 1902 Figure 21

Distribution.

Native to the Australian region. Described from Australia, where the species is widespread and common ( Endrödy-Younga 1990). Also recorded from New Zealand ( Johnson 1997). Adventive in the Afrotropical region (South Africa), the Palaearctic region (British Isles and Central Europe; Endrödy-Younga 1990, Johnson 1997, Meybohm 2004, Löbl 2006), and the Nearctic region (British Columbia, Canada).

Canadian records.

British Columbia: West Vancouver, 20-Apr-2015 to 08-May-2015 (1 ex, CBG).

Diagnostic information

(based on Endrödy-Younga 1990 and Johnson 1997). Body length 1.0-1.2 mm. Habitus as in Fig. 21A . Pale red-brown, with head and anterior part of pronotum darkened. Lateral angles of head narrowly rounded, rectangular, a line drawn between the angles level with the posterior margin of eyes. Dorsal surface without microsculpture. Apical part of elytra with large punctures. Pubescence of elytra relatively long and sparse, individual setae only a little longer than distance between seta-bearing punctures. Aedeagus as in Fig. 21B , penis finely serrate laterally in the apical quarter.

Bionomic notes.

This species is known from decaying plant material. It has been collected from heaps of cut grass, heaps of shredded bark, and (in New Zealand) from tree fungi ( Johnson 1997). The Canadian specimen was collected with a Malaise trap in a suburban residential area.

Comments.

Morphologically, Clambus simsoni is most reliably identified by its characteristic male genitalia. The Canadian specimen is a male which shares an identical barcode sequence with a specimen sampled from Germany. In Endrödy-Younga’s (1981) key to the New World species of Clambus , C. simsoni leads to C. spangleri Endrödy-Younga in couplet 14. Clambus simsoni is slightly larger ( C. spangleri is 0.8-0.9 mm according to Endrödy-Younga), and the pubescence on the dorsal surface is sparser than in C. spangleri .

Figures

Figures 20, 21. 20 Calyptomerus dubius (Marsham) 20 A habitus, L. Borowiec 20 B aedeagus, dorsal view 21 Clambus simsoni Blackburn 21 A habitus 21 B aedeagus, ventral view. Scale bars: 0.5 mm (20 A; 21 A), 0.2 mm (20 B), 0.1 mm (21 B).