Integrative taxonomy of Nearctic and Palaearctic Aleocharinae: new species, synonymies, and records (Coleoptera, Staphylinidae) Author Brunke, Adam J. https://orcid.org/0000-0003-1158-936X Agriculture and Agri-Food Canada, Canadian National Collection of Insects, Arachnids and Nematodes, 960 Carling Avenue, Ottawa, Ontario, K 1 A 0 C 6, Canada adam.j.brunke@gmail.com Author Pentinsaari, Mikko https://orcid.org/0000-0001-7241-3873 Centre for Biodiversity Genomics, 50 Stone Road East, University of Guelph, Guelph, Ontario, N 1 G 2 W 1, Canada Author Klimaszewski, Jan Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055 du PEPS, PO Box 10380, Stn. Sainte-Foy, Quebec, QC, G 1 V 4 C 7, Canada text ZooKeys 2021 2021-05-31 1041 27 99 http://dx.doi.org/10.3897/zookeys.1041.64460 journal article http://dx.doi.org/10.3897/zookeys.1041.64460 1313-2970-1041-27 EEE8490BB41D4A6CA963234C256C99BF 5AE03537388755CFAF1E06C3CC9EFA72 Homalota plana (Gyllenhal, 1810) Fig. 26A-G Material (DNA barcoded specimens). Belgium : Sint-Genesius-Rode, BR Zonienwoud , 50.7505 , 4.423 , 28.IV.2010 , F. Koehler (1, ZSM) . Germany : Arnsberg-Breitenbruch , NWZ Hellerberg , 51.446 , 8.135 , 30.V.2011 , F. Koehler (2, ZSM); Heimbach-Blens, Linkheld, 50.648 , 6.468 , 29.VIII.2012 , F. Koehler (2, ZSM); Erftstadt-Bliesheim, NWZ Altwald Ville, 50.7917 , 6.84384 , 03.VI.2011 , F. Koehler (1, ZSM); westl. Klein-Quenstedt, 51.9239 , 11.0478 , 20.III.2015 , GBOL-Team ZFMK (1, ZFMK) . Finland : Al : Finstroem , Norroe , 60.2458 , 19.822 , 5.VII.2012 , M. Pentinsaari (1, ZMUO); Ka : Joutseno , Kuurmanpohja , 61.071, 28.75, 3.VIII.2012 , M. Pentinsaari (1, ZMUO) . Canada : Ontario : Guelph , Eramosa River Trail, 43.539 , -80.236 , deciduous forest, 14.IV.2017 , M. Pentinsaari (2, CBG) . Distribution. Origin. Uncertain. Canada : AB, MB, NB, NF, NS, ON. United States : AZ, CA, CO, IA, ID, IN, MT, NY, OH, PA, TX. Bionomics. Specimens occur under bark of dead trees. Comments. Sequenced Nearctic specimens from ON form a distinct barcode cluster, separate from all sequenced Palearctic specimens and divergent by 7.58%. This pattern is inconsistent with a species adventive in North America and we remove H. plana from the list of adventive species in Canada. Preliminary comparisons between images of Palaearctic and Nearctic specimens revealed that there may be some slight differences in the shape of the spermatheca. More research is needed to determine the status of the Nearctic and Palaearctic populations, though the level of genetic divergence between discrete Nearctic and Palaearctic populations suggests that two sister species are involved. Figure 26. Homalota plana (Gyllenhal) A habitus B median lobe of aedeagus in lateral view C spermatheca D male tergite VIII E male sternite VIII F female tergite VIII G female sternite VIII. Scale bars: 1 mm ( A ); 0.2 mm ( B-G ). Illustrations after Klimaszewski et al. (2018) , used with permission.