Sciapus ZELLER 1842
Creators: name: Grichanov, I. Ya.
name: Selivanova, O. O.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Dolichopodidae
Sciapus

description: 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  Negrobov et Shamshev, 1986   
– Abdominal segments 1-4 at least partly yellow.................................................................... 8  
 8. Lobes of organ X bifurcate, with short apical setae; body length 5.0 mm (Gansu, Inner Mongolia) ….....................................................................................  S. flexicornis  Parent, 1944   
 – Lobes of organ X fused to apex, thin and beaked at apex, with curved dorsally distal process; with uninterrupted row of ventral setae decreasing in length towards apex; fore and mid tarsi covered with erect setulae; body length 3.6 mm (Yakutia) ….............................................................................................................  S. vladimiri  Grichanov et Negrobov, 2014
description: Published as part of Grichanov, I. Ya. & Selivanova, O. O., 2022, The long-legged flies (Diptera: Dolichopodidae) from Kurile Islands, with description of a new species of the genus Sciapus Zeller, 1842, pp. 7-24 in Far Eastern Entomologist 445 on pages 17-18, DOI: 10.25221/fee.445.2, http://zenodo.org/record/7166752