Philhygra palustris (Kiesenwetter, 1844)

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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Philhygra palustris (Kiesenwetter, 1844)


Philhygra palustris (Kiesenwetter, 1844)   Fig. 34A-H View Figure 34


(DNA-barcoded specimens). Canada: Ontario: Puslinch, Hanner property, 43.4464, -80.2512, Malaise trap in hardwood forest, 21.VIII.2008, T. Terzin (1, CBG); Puslinch, concession 11/Hume Rd., 43.537, -80.134, Malaise trap in temperate mixed forest, 18-24.IV.2010, P. Hebert (1, CBG); Milverton, Milverton Public School, 43.568, -80.928, Malaise trap, 3.V.2013, J. Van Bakel (1, CBG); Cambridge, rare Charitable Research Reserve, Hogsback forest, 43.3729, -80.354, edge of hardwood forest, intercept trap, 31.V.2015, BIO collections staff (2, CBG); same except pan traps (1, CBG); Kawartha Lakes, 44.366, -78.478, farm, Malaise trap, 13.VI.2015, B. McClenaghan (2, vouchers not preserved); Guelph, Arkell Research Station, 43.5187, -80.1709, between corn and soy fields, w/ nearby pasture, Malaise trap, 8.V.2015, BIO collections staff (1, CBG); same except soy field, 43.5264, -80.1796, 4-headed SLAM trap, 17.V.2017 (1, CBG); Hamilton, Royal Botanical Gardens, Cootes Paradise, 43.281, -79.904, forest, deadwood and UV lights at night, 21.VII.2017, M. Pentinsaari (1, CBG); Markham, 43.9371, -79.2285, mixed habitat, Berlese funnel, 25.VI.2017, Rouge NUP BioBlitz Volunteers (1, CBG). Belgium: Sint-Genesius-Rode, BR Zonienwoud, 50.7505, 4.423, 16.VI.2010, F. Koehler (1, ZSM). Estonia: Piusa, 57.844, 27.466, 05.VII.2010, J. Salokannel (2, ZMUO). Finland: Ab: Nauvo, Sandö, 60.1747, 22.1338, 18.VI.2011, M. Pentinsaari (1, ZMUO); Ok: Vaala, Manamansalo, 64.3365, 27.0879, 21.VIII.2011, M. Pentinsaari (1, ZMUO); Ks: Kuusamo, Oulanka, 66.3686, 29.3188, 07.VIII.2011, M. Pentinsaari (1, ZMUO); Ka: Virolahti, Hailiniemi, 60.5259, 27.7366, 20.VII.2012, M. Pentinsaari (1, ZMUO). Germany: Riedlhuette, Diensthuettenstrasse, 48.937, 13.412, 09.VII.2011, F. Koehler and M. Koehler (2, ZSM); Spiegelau, Schwarzachstrasse, 48.9456, 13.3619, 09.VII.2011, F. Koehler and M. Koehler (2, ZSM); Waldhaeuser, Lusen- und Boehmstrasse, 48.93, 13.492, 09.VII.2011, F. Koehler and M. Koehler (2, ZSM); Arnsberg-Breitenbruch, NWZ Hellerberg, 51.4461, 8.13539, 30.V.2011, F. Koehler (2, ZSM); Bornheim-Hemmerich, Hellenmaar, 50.7402, 6.91803, 14.VIII.2012, F. Koehler (1, ZSM); Erftstadt-Bliesheim, NWZ Altwald Ville, 50.7917, 6.84384, 03.VI.2011, F. Koehler (1, ZSM); Kandel, Bienwald, 49.01, 8.103, 05.VI.2010, F. Koehler (1, ZSM); Eisenach, E, Rothenhof, Hoerselufer, 50.9643, 10.3644, 06.VII.2013, GBOL-Team ZFMK (2, ZFMK).


Origin. Palaearctic (adventive in North America). Canada: MB, ON [new record]. USA: CT, MA, ME, NH, NY, PA, RI, SC, VT, WI.


Males of this species are easily recognized among other Canadian Philhygra   by the simple, non-projecting median lobe in lateral view (Fig. 34B View Figure 34 ).


Most specimens of this species were collected by passive traps in a variety of habitats. In Sweden, P. palustris   is considered a eurytopic species that occurs in various types of decaying plant matter, including compost, seaweed and hay piles, and along muddy shores of water bodies ( Palm 1970). It can be collected in very large numbers using a car net (V. Assing, pers. comm.).


Philhygra palustris   is a Palaearctic species that has become adventive and widespread in eastern North America. In the Palaearctic, it is very broadly distributed and reported from Europe, North Africa (Morocco), Russia (European and Siberia), Mongolia, North and South Korea (Lee and Ahn 2012), Japan, and northern China ( Newton 2019). It is also known from the Azores and the Canaries ( Newton 2019), though it is likely introduced there as well.

This species was reported from Canada (Manitoba) for the first time in the checklist by Bousquet et al. (2013) but no specimens could be found in the CNC to support this record. It is likely that the species P. tenuicula   (Casey, 1911) described from Manitoba and treated as a synonym of P. palustris   ( Newton 2019), is the basis of this record. Philhygra palustris   was first recorded from North America by Muona (1984) from New York, Maine and Pennsylvania but detailed specimen level data were not provided. Several specimens from various localities in southern Ontario have been sequenced, and their barcodes cluster with European specimens, with multiple haplotypes shared between Canada and Europe. This common European species is here confirmed to be adventive in Canada and is probably broadly distributed in at least eastern North America.