The Nearctic species of Grzegorzekia Edwards (Diptera: Mycetophilidae) Author Fitzgerald, Scott J. text Zootaxa 2019 2019-06-24 4623 3 163 174 journal article 26426 10.11646/zootaxa.4623.1.11 9bb21e49-9809-47cf-8a01-77ecee28fa9d 1175-5326 3253496 EB3BA36D-C89F-4B44-886E-9FABB58BCDF8 Key to the species of Grzegorzekia (female of G. bushyae unknown) 1 Abdominal tergites of both sexes with narrow pale posterior bands (as Fig. 1 ); male mid-tibial organ present (as Fig. 6 ); female sternite 8 longitudinally divided medially ( Figs. 11–12 ); (western Nearctic)....................................... 2 - Abdominal tergites without pale posterior bands, but tergites may sometimes have anterolateral pale areas on some or all of tergites 2–7; male mid-tibial organ absent; female sternite 8 undivided medially in known species (female of G. bushyae unknown) though may have an emargination posteromedially (as Fig. 10 ); (Palearctic, Holarctic)........................ 3 2 Male terminalia as in Figs. 3–5 ; cercus without a strong, black, spine-like seta; gonocoxal comb of black spine-like setae visible in dorsal view ( Fig. 5 ; com); gonocoxal lobe slender, elongate with apical setae ( Figs. 3–4 ; gc lb); female sternite 8 posteromedially lobate in ventral view ( Fig. 11 ); ( western Nearctic ).................................. .. G. kerri Fitzgerald n. sp . - Male terminalia as in Figs. 7–9 ; cerci each with a single, strong, black spine-like seta; gonocoxal comb of black spine-like setae not visible in dorsal view; gonocoxal lobe short, cow-horn-like, without apical setae ( Figs. 7–9 ; gc lb); female sternite 8 without distinct posteromedian lobes in ventral view ( Fig. 12 ) (western Nearctic).................... G. quercus Fitzgerald n. sp. 3 In lateral view, gonocoxites (section II) with a single apical lobe bearing a comb of stout, black, spine-like setae (as in Fig. 4 ; gc II); female unknown; ( England , France ).................................................. G. bushyae Chandler - In lateral view, gonocoxites (section II) with two lobes, the anterior lobe bearing a comb of stout, black, spine-like setae (as in Chandler, 1999 ; Fig. 13 ); (Palearctic and Holarctic).......................................................... 4 4 Aedeagus slender, nearly parallel-sided, elongate, extending beyond apex of gonocoxites; female with sternite 8 not deeply emarginated medially, posterior edge medially lacking stout, black, spine-like setae (see Papp & Ševčík, 2007 , Figs. 1–5 ); ( Hungary , Slovakia )............................................................. G. hungarica Papp & Ševčík - Aedeagus triangular, shorter, not reaching apex of gonocoxites (see Chandler, 1999 , Figs. 13 –14); female with sternite 8 posteromedially more deeply emarginated, with two patches of stout, black, spine-like setae (one patch on each side of the median emargination with each patch bearing 2–3 setae) as Fig. 10 ; (Holarctic)........................... G. collaris (Meigen)