Geostiba

• Main Author: Gusarov, Vladimir I.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2002
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Coleoptera; Staphylinidae; Geostiba; Newfoundland
• Online Access: https://doi.org/10.5281/zenodo.6277552; http://treatment.plazi.org/id/5B50E916FF9039324D2DFE42FAC3FE5F

Key for Identification of Nearctic Species of Geostiba 1 In males pronotum with one medial tubercle at posterior margin; each elytron with a tubercle near scutellum but not at the 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. 1­3 in Assing (2001). Spermatheca: Fig. 4 in 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). – In males pronotum without a medial tubercle at posterior margin; elytral suture is raised behind scutellum (flat in G. impressula ); abdominal tergum 7 with two short and parallel medial carinae in front of posterior margin or without carinae. Posterior margin of female sternum 8 medially slightly concave or with emargination (Figs. 32­ 33, 54­55). Native Nearctic species. 2 2 Species occurring in eastern North America, east of the Rocky Mountains. 3 – Species occurring in western North America, west of the Rocky Mountains. 15 3 Temples 2.3­2.7 times as long as eyes. Elytra (measured from humeral level) longer than pronotum. Wings fully developed. In males abdominal tergum 7 with two short and parallel medial carinae in front of posterior margin, abdominal tergum 8 with four short and weak carinae in front of posterior margin. Apex of median lobe in lateral view bent ventrally and widened apically (Figs. 36­37). Body length 1.9­2.4 mm, pronotal width 0.40­0.47 mm. Widely distributed in eastern North America from Mount Rogers, Virginia in the south to Maine, Québec and Wisconsin in the north (Fig. 337). 1. G. ( Sibiota ) appalachigena Gusarov, sp. n. – Temples 2.7­6.0 times as long as eyes. Elytra shorter than pronotum. Wings reduced to short vestiges, shorter than elytra. Apex of median lobe of aedeagus has different shape. Distributed in the Southern Appalachians (North Carolina and Tennessee) (Figs. 337­338). 4 4 Males (In males ...