title: Peyerimhoffiajaschhoforum (Diptera, Sciaridae), a new deadwood inhabiting species from Canada.
abstract: A new species of black fungus gnat from Canada, Peyerimhoffiajaschhoforum sp. n., is presented with a description, illustrations, biotope information and a brief discussion of the placement and concept of the genus Peyerimhoffia. P.jaschhoforum is characterized by a unique gonostylar structure where the apex is hollowed but not enclosed and contains a mass of mega setae housed within. P.jaschhoforum was reared from decomposing jack pine (Pinusbanksiana Lamb.) deadwood using both in-situ and ex-situ photoeclectors. We documented three additional specimens originating from Fennoscandia that resemble P.jaschhoforum but differ based on a broader tegmen, placement of setigerous papillae behind the tegmen and the fused intercoxal area. Based on this, these specimens are assigned to a new subspecies, Peyerimhoffiajaschhoforumfennoscandica ssp. n.
authors.affiliation: Université du Québec à Montréal (UQÀM), Montréal, Canada.
authors.forename: Rob
authors.initials: R
authors.lastname: Deady
authors.affiliation: Unaffiliated, Quickborn, Germany.
authors.forename: Kai
authors.initials: K
authors.lastname: Heller
authors.affiliation: Université du Québec à Montréal (UQÀM), Montréal, Canada.
authors.forename: Timothy
authors.initials: T
authors.lastname: Work
authors.affiliation: Natural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre, Sault Ste. Marie, Canada.
authors.forename: Lisa
authors.initials: L
authors.lastname: Venier
keywords: Black fungus gnats; Boreal zone; Pinusbanksiana; new taxa; photoeclector