Atheta (Microdota) pennsylvanica Bernhauer, 1907

Klimaszewski, Jan, Godin, Benoit, Davies, Anthony, Bourdon, Caroline & Horwood, Denise, 2018, Forty new records of aleocharine beetles, and two new species in the genera Acrotona Thomson and Atheta Thomson, for the province of Manitoba, Canada (Coleoptera: Staphylinidae: Aleocharinae), Insecta Mundi 2018 (641), pp. 1-33 : 16

Atheta (Microdota) pennsylvanica Bernhauer

Distribution

Origin	Nearctic
Distribution	Canada: LB, MB, NB, NF, NS, ON, QC. USA: IN, MA, MN, NY, PA, RI, VA, VT
New provincial Canada: Manitoba: Birds Hill [Prov. Park] - bur oak [trail], 2016-IX-16, records 50.0083°N, 96.9216°W, 264 m, mushrooms, sifting, B. Godin & D. Horwood ( BGC) 2 males, 1 female; same locality data ( LFC) 2 males, 2 females ; Hecla, 2016-IX-17, 51.7849°N, 96.6152°W, 218 m, mushroom, sifting, B. Godin & D. Horwood ( BGC) 1 female.
References	Bernhauer, 1907, Klimaszewski et al. 2018

Collection and habitat data. Habitat (outside of the study area). This species is found in various conifer, mixed and hardwood/deciduous forests such as red spruce dominated forests, black spruce forests, balsam fir-spruce forests, jack pine forests, red pine forests, old-growth hemlock forests, riparian forests, red oak and maple forests, red oak forests, various mixed forests, northern hardwood forests, rich Appalachian hardwood forest, Populus stands, and yellow birch forests. Adults are often abundant in various kinds of decaying and fresh mushrooms (gilled, polypore; Polyporus varius on side of log, stalked polypores) on forest floor and also occur in forest litter, especially in the spring; often captured in abundance in pitfall traps. Collecting period. IV–X. Collecting method. Sifting forest litter, pitfall traps.