DNA barcodes reveal 63 overlooked species of Canadian beetles (Insecta, Coleoptera)

Abstract

This study demonstrates the power of DNA barcoding to detect overlooked and newly arrived taxa. Sixty-three species of Coleoptera representing 25 families are studied based on DNA barcode data and morphological analysis of the barcoded specimens. Three of the species involve synonymies or previous taxonomic confusion in North America, while the first Canadian records are published for 60 species. Forty-two species are adventive in North America, and 40 of these adventive species originate from the Palaearctic region. Three genera are recorded from the Nearctic region for the first time: Coelostoma Brullé, 1835 (Hydrophilidae), Scydmoraphes Reitter, 1891 (Staphylinidae), and Lythraria Bedel, 1897 (Chrysomelidae). Two new synonymies are established: Mycetoporus triangulatus Campbell, 1991 (Staphylinidae) is a junior synonym of Mycetoporus reichei Pandellé, 1869, syn. nov. while Bledius philadelphicus Fall, 1919 (Staphylinidae) is a junior synonym of Bledius gallicus (Gravenhorst, 1806), syn. nov. The previously suggested move of Ctenicera tigrina (Fall, 1901) to the genus Pseudanostirus Dolin, 1964 (Elateridae) is formalized, resulting in Pseudanostirus tigrinus (Fall, 1901), comb. nov.

Synopsis of adventive species of Coleoptera (Insecta) recorded from Canada. Part 5: Chrysomeloidea (Cerambycidae, Chrysomelidae, and Megalopodidae)

“…Native range. Palearctic: widespread across the region (Konstantinov et al 2011); adventive in Canada (Pentinsaari et al 2019). First North American records.…”

“…It has been recorded as a minor pest of wheat and barley in Europe (Pavlov 1960, Vappula 1965. Most of the barcoded Canadian specimens were collected with Malaise traps in suburban environments (Pentinsaari et al 2019). A few records are from grassland and forest habitats in Canadian national parks (Pentinsaari et al 2019).…”

“…Chaetocnema hortensis has previously been confused with C. borealis White in Canada (Pentinsaari et al 2019). Most Canadian specimens in CNC identified as C. borealis actually represent C. hortensis (Pentinsaari et al 2019). The elytral punctation of the two species is similarly irregular basally.…”

“…In Finland, it is most often collected in dry, barren habitats (Rutanen and Martikainen 2014). The Canadian specimens were collected with a Malaise trap in a suburban residential area (Pentinsaari et al 2019). (Fig.…”

“…Native range. Palearctic: Widespread in Europe, scattered records in Asia to East Siberia and Japan (Döberl 2010); adventive in Canada and the USA (Pentinsaari et al 2019).…”