Oligota pumilio Kiesenwetter, 1858

Brunke, Adam J., Pentinsaari, Mikko & Klimaszewski, Jan, 2021, Integrative taxonomy of Nearctic and Palaearctic Aleocharinae: new species, synonymies, and records (Coleoptera, Staphylinidae), ZooKeys 1041, pp. 27-99: 27

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Oligota pumilio Kiesenwetter, 1858


Oligota pumilio Kiesenwetter, 1858   Fig. 15A-C View Figure 15


(DNA barcoded specimens). Belgium: Blanden, BR Meerdaalboos , 50.7976, 4.71622, 8.V.2010, F. Koehler (1, ZSM) GoogleMaps   . Germany: Neuburg, Altrheine , 48.9943, 8.24412, 29.IX.2011, F. Koehler (2, ZSM); Erftstadt-Bliesheim, NWZ Altwald Ville, 50.792, 6.844, 4.X.2010, F. Koehler (1, ZSM); Jockgrim, Sandmagerrasen, 49.0805, 8.26568, 14.XI.2010, F. Koehler (1, ZSM); Ochtendung, Michelsberg, 50.3631, 7.3889, 17.III.2012, F. Koehler (1, ZSM); Edenkoben-Rhodt, Villa Ludwigshoehe, 49.2767, 8.08991, 20.V.2012, F. Koehler (1, ZSM); Bad Muenster-Traisen, Rotenfels, 49.822, 7.832, 20.V.2012, F. Koehler & J. Koehler (1, ZSM); Osterholz bei Blankenburg, 51.9519, 11.0526, 18.III.2015, GBOL-Team ZFMK (2, ZFMK) GoogleMaps   . Canada: Alberta: Waterton Lakes National Park, Red Rock Parkway , 49.088, -113.883, Moraine grassland, intercept trap, 1328 m, 11.VIII.2012, BIOBus 2012 (1, CBG) GoogleMaps   . United States: Montana: Missoula County, Florence, MPG Ranch , 46.702, -114.034, grassland, pitfall trap, 05.VI.2019, M. Seidensticker (1, CBG) GoogleMaps   .


Origin: West Palaearctic (adventive in North America). Canada: AB [new record]. United States (all except MT need verification): DC, IL, OH, MT [new record].


Among Canadian species of Oligota   , O. pumilio   is extremely similar to O. pusillima   in the narrow, parallel body (Fig. 15A View Figure 15 ) and in male and female genitalia ( Klimaszewski et al. 2018). However, it can be distinguished by the more abruptly truncate apex of the median lobe in lateral view (Fig. 15B View Figure 15 ), differently shaped sclerites of the internal sac (Fig. 15B View Figure 15 ), medially projected apex of male sternite VIII, and the transverse capsule of the spermatheca (Fig. 15C View Figure 15 ) ( Kapp 2019).


This species occurs in a wide variety of habitats across a broad elevational range, including hollow trees, plant debris, old hay in cattle barns, moldy substrates and in mushrooms ( Kapp 2019). The barcoded Nearctic specimens were collected from grassland habitats by an intercept trap (Alberta) and a pitfall trap (Montana).


Oligota pumilio   is a West Palaearctic species that is adventive in Canada. Although it has been previously reported from the United States (OH, IL, DC) ( Newton 2019), these records need confirmation as they are in the east, some distance away from the present records. This species’ presence in North America is thus verified here for the first time, from both Canada (AB) and United States (MT). It has also been reported as adventive from Argentina, Chile, and New Zealand ( Newton 2019). The barcoded specimens of O. pumilio   from Canada and the United States share the same DNA barcode haplotype, which is also shared by some of the specimens from Germany.