Sciapus ZELLER 1842

• Main Authors: Grichanov, I. Ya., Selivanova, O. O.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2022
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Dolichopodidae; Sciapus; Sakhalin
• Online Access: https://doi.org/10.5281/zenodo.7168672; http://treatment.plazi.org/id/03BFB370005AFFF7FED8FD01E615769A

Key to East Palaearctic species of the genus Sciapus (males) 1. Tarsi with one or more segments enlarged (often slightly) …. 2 – All tarsi simple, at most some segments with erect setulae, or elongated, or sometimes 5th segment flattened dorsoventrally and slightly broadened …. 5 2. Mid tarsus with 3rd segment not enlarged, and 4th segment slightly enlarged; fore tarsus simple; body length 5.5–5.8 mm (Primorye) …. S . dytei Negrobov, Maslova et Selivanova, 2012 – Mid tarsus simple; fore tarsus with 4th segment bearing dorsal lobe …. 3 3. Acrostichals present; wing vein dm-m straight; body length 7.9–8.1 mm (Primorye, Sakhalin) …. S . paradoxus Negrobov et Shamshev, 1986 – Acrostichals absent; wing vein dm-m strongly convex …. 4 4. Epandrial lobe much longer than epandrium, bearing long hairs; antennal pedicel with pale bristles; hind basitarsus much longer than next segment; body length 5.0–8.0 mm (TransPalaearctic) …. S . nervosus (Lehmann, 1822) – Epandrial lobe shorter than epandrium, sparsely ciliated; antennal pedicel with dark bristles; body length 6.0 mm (Amurian Region, Primorye) …. S . roderi Parent, 1929 5. Frons, mesonotum and abdomen entirely shining green, only very feebly dusted; cerci mostly fused, each cercus with long free distal projection; organ X (ventral cercal projection) reduced …. 6 – Frons, thorax and abdomen not shining, densely pollinose, sometimes with shining spots or stripes; cerci fused, organ X large …. 7 6. Distoventral projection of cercus with short simple setae; surstylus with simple setae at apex; body length 4.7–4.9 mm (Primorye) …. S . incognitus Negrobov et Shamshev, 1986 – Distoventral projection of cercus with ventral fringe of strong flattened bristles and 1 long undulate flattened apical seta; ventral process of surstylus with 2 long undulate flattened apical setae; body length 5.0 mm (Kunashir) …. S . basarukini sp. n. 7. Abdomen entirely dark, rarely with yellow-brown spots laterally at base; body length 4.8 mm (Buryatia, Chita, Irkutsk, Primorye) …. S . sibiricus ...