A revision of Nearctic species of the genus Geostiba Thomson, 1858 (Coleoptera: Staphylinidae: Aleocharinae) Gusarov, Vladimir I. Zootaxa 2002 81 1 88 8VRPP [818,924,510,536] Insecta Staphylinidae Geostiba Animalia Coleoptera 14 15 Arthropoda genus   1 In males pronotum with one medial tubercle at posterior margin; each elytron with a tubercle near scutellum but not atthe elytral suture; abdominal tergum 7 with one short medial carina in front of posterior margin. Posterior margin of female sternum 8 distinctly convex, without medial emargination. Aedeagus: Figs. 1­3in Assing (2001). Spermatheca: Fig. 4in Assing (2001). Body length 2.3­2.8 mm, pronotal width 0.43­0.53 mm. Introduced from Europe to Newfoundland ( Fig. 336) ................ ......................................................................... 15. G.( s. str.)  circellaris(Gravenhorst).