Calitys scabra, (Thunberg, 1784)

Kippenhan, Michael G., 2022, The Bark-Gnawing Beetles of Montana, USA (Coleoptera: Trogossitidae, Peltidae, and Lophocateridae), Including New Substantial Distributional Records for Tenebroides collaris (Sturm), The Coleopterists Bulletin 76 (4), pp. 569-576 : 571

CALItyS ScABRA (Thunberg, 1784)

This Holarctic species has a broadly recorded distribution in the Boreal regions of North America as well as west of the Great Plains in the United States. Montana records indicate it is primarily associated with the Northwestern Forested Mountain (NFM) Level I Ecoregion (Commission for Environmental Cooperation 1997). Both the single Fergus County and single Hill County records were associated with isolated, higher-elevation Middle Rockies Level III Ecoregions surrounded by lower-elevation Northwestern Great Plains and Northwestern Glaciated Plains Level III Ecoregions, respectively (Woods et al. 2002). The only Montana specimens collected within the northwestern Great Plains were from a forested outcrop area of the Long Pines Unit of Custer Gallatin National Forest in Carter County. It is interesting to note that in Montana, the known distribution of this species coincides with the distribution of ponderosa pine, Pinus ponderosa Douglas ex. C. Lawson ( Pinaceae ; Data Basin 2022). In total, 88 specimens were examined, only 11 of which were collected by Lindgren funnels and one from a vane trap baited with “spruce, EtOH Ge.Ac.”. The two specimens from Carter County were recorded as having been reared from the woody fungus Fomes (Fr.) Fr. ( Polyporaceae ) collected on P. ponderosa .

County Records ( Fig. 2A ): Beaverhead (1), Carter (2), Fergus (1), Flathead (20), Gallatin (5), Granite (1), Hill (1), Lake (1), Lincoln (17), Mineral (1), Missoula (1), Ravalli (32), Sanders (5).

Figures

Fig. 2. Distribution of 12 species of bark-gnawing beetles by county in Montana.A) Calitys scabra, B) Corticotomus caviceps, C) Temnoscheila chlorodia, D) Tenebroides collaris, E) Tenebroides corticalis, F) Tenebroides crassicornis, G) Tenebroides occidentalis, H) Tenebroides sinuatus, I) Peltis fraterna, J) Peltis pippingskoeldi, K) Peltis septentrionalis, L) Eronyxa angusta.