Ceutorhynchus mutabilis Dietz, 1896

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

Ceutorhynchus mutabilis Dietz, 1896 Figure 47

Distribution.

Native to the Nearctic region. This species is reported from Baja California, California, Oregon, Washington, Colorado, Kansas, and North Dakota in the United States ( O’Brien and Wibmer 1982; Balsbaugh and Aarhus 1990).

Canadian records.

British Columbia: Radium, 24-Aug-1982 (2 exx, CNC); New Afton Mine, 20-Jun-2013 to 27-Jun-2013 (1 ex, CBG). Alberta: Calgary, 22-Jul-1976 (1 ex, CNC); Exact locality not specified, 20-Jun-1985 (1 ex, CNC); Exact locality not specified, 09-Jun-1990 (1 ex, CNC). Saskatchewan: Grasslands National Park, 19-Jul-2012 to 26-Jul-2012 (1 ex, CBG). Manitoba: Exact locality not specified, 24-Jul-1995 (1 ex, CNC).

Diagnostic information

(based on Scheibner 1963). Body length: 2.4 mm. Habitus as in Fig. 47 , body with black integument covered with white to pale brown scales. Antennal funicle with seven antennomeres. Combination of two types of scales on pronotum and elytra, some broadly oval, others expanding from base with a truncate apex. Elytra with dense patch of appressed oval scales posterior to scutellum. Metafemora lacking tooth. Tarsal claws each with a small basal tooth.

Bionomic notes.

The natural history and host preferences of this little-studied species are unknown ( Colonnelli 2004).

Comments.

Although this genus is in need of a revision, the combination of character states listed above, in combination with the habitus photograph ( Fig. 47 ), should lead to the correct identification. Studies describing the biology of this and other native species of Ceutorhynchus Germar, 1824 are badly needed.

Figures

Figures 46 - 48. 46 Ceutorhynchus inaffectatus Gyllenhal 46 A habitus, L. Borowiec 46 B aedeagus 47 Ceutorhynchus mutabilis Dietz, habitus 48 Exomias trichopterus (Gautier des Cottes) 48 A male habitus, L. Borowiec 48 B female habitus, L. Borowiec. Scale bars: 1.0 mm (46 A; 47; 48), 0.5 mm (46 B).