Mycetoporus reichei Pandelle , 1869

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

Mycetoporus reichei Pandelle, 1869 Figure 4

= Mycetoporus triangulatus Campbell, 1991, syn. nov.

Distribution.

Native to the West Palaearctic region and broadly distributed ( Schülke and Smetana 2015). Adventive in the Nearctic region (Massachusetts, New Hampshire, and Wisconsin, United States, and Ontario, Quebec, and New Brunswick, Canada) ( Campbell 1991, as M. triangulatus ).

Canadian records

(DNA barcoded specimens). Ontario: Orangeville, 22-Sep-2014 to 03-Oct-2014 (1 ex, CBG); Owen Sound, 21-Aug-2014 to 04-Sep-2014 (1 ex, CBG).

Additional Canadian records.

See Campbell (1991) and Brunke et al. (2014) for details of earlier records from Canada and United States (as M. triangulatus ).

Diagnostic information.

Body length: 3.1-4.3 mm. Habitus as in Fig. 4A . Ocular puncture of head located at inner edge of eye. Discal pronotal punctures absent. Elytral disc with only one row of punctures, and elytral microsculpture only distinct in apical half. Aedeagus as in Fig. 4B .

Bionomic notes.

In the Nearctic, Campbell (1991) reported this species from a vole nest, spruce litter, car net, flood debris, and from a deciduous forest. Brunke et al. (2014) collected this species (as M. triangulatus ) from soybean fields and their adjacent hedgerows in Ontario, Canada. The barcoded Canadian specimens were collected with Malaise traps, one in a suburban residential area and the other in grassland habitat.

Comments.

Campbell (1991) described Mycetoporus triangulatus and stated that it is "almost certainly introduced" but was unable to match it to Palaearctic species available for study. The Palaearctic species of Mycetoporus were only recently revised to include the complex sclerites of the internal sac (e.g., Schülke 2012b) and the Nearctic fauna had not been reviewed since. The Finnish specimens in the BIN are identified as M. clavicornis (Stephens, 1832), a close relative of M. reichei . These specimens may be misidentified (they were identified by MP before the presence of M. reichei in Finland was detected) and need to be re-examined.

Figures

Figures 3, 4. 3 Bibloplectus minutissimus (Aube) 3 A habitus 3 B aedeagus, ventral view, re-drawn from Loebl (1960) 4 Mycetoporus reichei Pandelle 4 A habitus 4 B aedeagus, ventral and lateral view, M. Kocian. Scale bars: 0.25 mm (3 A), 0.1 mm (3 B), 1.0 mm (4 A), 0.2 mm (4 B).