Leiodes polita (Marsham, 1802)

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

Leiodes polita (Marsham, 1802) Figure 2

Distribution.

Native to the Palaearctic region. Widespread in Europe, also recorded from North Africa and Caucasus ( Daffner 1983; Perreau 2004). Adventive in the Nearctic region (Ontario, Canada).

Canadian records.

Ontario: Puslinch Township, 15-Aug-2010 to 22-Aug-2010 (1 ex, CBG); Guelph, 18-Aug-2010 (1 ex, CBG).

Diagnostic information

(based on Daffner 1983). Body length 2.2-4 mm. Habitus as in Fig. 2A . Red-brown or yellow-brown, head, pronotum and the sutural and lateral margins of elytra sometimes darkened. Antennae long, with a strongly transverse, darkened club, last antennomere narrower than antennomere 10. Head normally with four punctures in transverse series. Basal margin of pronotum sinuate laterally. Mesoventrite with a long, low and evenly curved medial carina, not reaching the transverse carina and without excavation anteriorly. Metaventrite approximately as long as abdominal ventrites 1 and 2 combined. Elytra with regular, strongly and densely punctate striae, interstitial punctures sparse. Elytra not transversely strigose or strongly microsculptured. Elytral stria 9 separated from side margin at basal third, forming a subhumeral row of punctures. Protibiae only moderately widened towards apex. Metafemora in both sexes with an apical projection at both inner and outer margins, projections stronger in males ( Fig. 2B ). Male metatibiae bent inward starting from the basal third. Male genitalia as in Fig. 2C, D .

Bionomic notes.

This eurytopic species is found in forests, forest edges, heaths, gardens etc. in Europe ( Koch 1989b). The Canadian specimens were collected with Malaise traps in suburban residential areas in southern Ontario.

Comments.

Leiodes polita leads to L. quebecensis Baranowski, 1993 in the key to North American species of Leiodes ( Baranowski 1993). It can be distinguished by the sinuate basal margin of the pronotum (straight in L. quebecensis and related species), differently formed projections of the metafemora, and the male genitalia.

Figures

Figure 2. Leiodes polita (Marsham) A habitus L. Borowiec B male left metafemur, dorsal view C aedeagus, ventral view D aedeagus, lateral view. Scale bars: 1.0 mm (A), 0.5 mm (B), 0.2 mm (C, D).