Cis glabratus Mellie , 1848

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

Cis glabratus Mellie, 1848 Figure 39

Distribution.

Native to the Palaearctic region, widespread in Europe ( Jelínek 2008). Common in northern Europe, mainly found in higher elevations in Central Europe ( Reibnitz 1999, Rassi et al. 2015). Adventive in the Nearctic region (Nova Scotia, Canada).

Canadian records.

Nova Scotia: Cape Breton Highlands National Park, 21-Jul-2009 (1 ex, CBG).

Diagnostic information

(based on Lohse 1967). Body length 1.5-2.0 mm. Red-brown to dark brown, habitus as in Fig. 39A . Clypeus in male with two large, broad teeth ( Fig. 39B ). Pronotum widest behind middle, distinctly tapering towards the front angles. Vestiture on pronotum fine and pale. Outer edge of protibia serrated. Male with a large abdominal fovea on 1st abdominal ventrite. Aedeagus as in Fig. 39C .

Bionomic notes.

The main host fungus in Europe is Fomitopsis pinicola (Sw.) P. Karst. ( Reibnitz 1999). The Canadian specimen was collected in a jack pine forest in Cape Breton Highlands National Park.

Comments.

Cis glabratus is externally very similar to C. levettei (Casey, 1898) and leads to that species in the key to North American species ( Lawrence 1971). The microscopic vestiture of the pronotum is longer and more conspicuous in C. glabratus , but the most reliable morphological differences are in the male genitalia ( Fig. 39C, D ). Cis levettei forms a separate BIN (BOLD:ACA7530) which is more closely clustered to other Palaearctic members of the C. nitidus species group ( C. castaneus (Herbst, 1793), C. jacquemartii Mellié, 1848 and C. lineatocribratus Mellié, 1848) than to C. glabratus .

Figures

Figures 38, 39. 38 Cis boleti (Scopoli) 38 A habitus, L. Borowiec 38 B pronotum 39 A Cis glabratus Mellie, female habitus, L. Borowiec 39 B Cis glabratus, male head and pronotum 39 C Cis glabratus, aedeagus 39 D Cis levettei (Casey), aedeagus. Scale bars: 0.5 mm (38 A, B; 39 A, B), 0.2 mm (39 C, D).