Dolichopus lantsovi Negrobov, Grichanov et Barkalov
- Dataset
- The Dolichopus latipennis species group (= Hygroceleuthus Loew) in the Palearctic Region (Diptera: Dolichopodidae)
- Rank
- SPECIES
- Published in
- Negrobov, Oleg P., Grichanov, Igor Ya., Barkalov, Anatolii V. (2009): The Dolichopus latipennis species group (= Hygroceleuthus Loew) in the Palearctic Region (Diptera: Dolichopodidae). Zootaxa 2087: 37-45, DOI: 10.5281/zenodo.187407
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Insecta
- order
- Diptera
- family
- Dolichopodidae
- genus
- Dolichopus
- species
- Dolichopus lantsovi
description
(Figs. 4 – 6)
description
Description. Male: Body length: 4.3 – 4.6 mm, wing length: 4.3 – 4.6 mm, wing width: 1.6 mm, antenna length: 1.3 mm, hypopygium length: 1.9 mm. Head: Face with dark-brown ground color, weakly silvery-white, nearly reaching lower eye margin, in middle about 1.5 times as wide as postpedicel height. Proboscis dark-brown; palpus dirty yellow, with black setulae, whitish pollinose. Frons shining, metallic green-black. Antenna (Fig. 4) black; scape elongated, 2 times longer than high, with row of dense black dorso-lateral setae. Pedicel slightly longer than high, with a ring of small apical setae; postpedicel bud-like, with obtuse-angular apex, hardly longer than high; stylus bisegmented, short, about as long as scape, pedicel and postpedicel combined, shortly haired, simple, located at 2 / 3 of dorsal surface of postpedicel. Lower postocular setae white. Thorax: metallic green-black; pleura weakly grey pollinose; proepisternum with 1 strong black seta and small white hairs. Legs: mainly dirty yellow; all coxae black; trochanters brown; fore femur black-brown except distal 1 / 3; mid femur brownish at base ventrally; hind femur darkened on basal 1 / 3; hind tibia brown-black on distal 1 / 5; hind tarsus black; fore and mid tarsi black from tip of basitarsus. Coxae with white setulae; fore and mid coxae with black apical setae; hind coxa with 1 strong black seta at middle. Femora without long ventral setae. Mid femur with 2 and hind femur with 1 strong anterior preapical setae; mid femur with small posterior preapical seta. Fore tibia with 2 anterodorsal, 2 posterodorsal and 1 – 2 posterior setae, with 1 fine long dark apicoventral seta. Mid tibia with 4 antero- and 2 posterodorsal setae, with 1 anteroventral seta. Hind tibia inconspicuously thickened at 1 / 3 and at apex, with 4 – 5 anterodorsal, 2 – 3 dorsal setae, with 1 ventral at 3 / 4 and preceding row of elongated ventral setulae in middle half, with small posterior apical tooth. All tarsi simple. Pulvilli and claws small. Hind basitarsus with 2 – 3 strong dorsal, 1 – 2 short anterior setae, with several short ventral setulae. Tarsomere length ratio: fore tarsus (from first to fifth): 25 / 10 / 7 / 6 / 7, mid tarsus: 38 / 15 / 14 / 10 / 9, hind tarsus: 32 / 30 / 19 / 12 / 10. Wing: hyaline, widely rounded at apex. Costa with short thickening at R 1, half as long as R 1. R 4 + 5 and M 1 + 2 parallel at apex. M 1 + 2 with strong but gentle curvation just before middle of distal part. Distal part of CuA 1 slightly longer than m-cu. Hind margin of wing evenly convex. Lower calypter yellow, with yellow-white cilia. Halter yellow. Abdomen: metallic green-black, shining, with black setae and hairs. Hypopygium black. Apicoventral epandrial lobe brown, broad, rounded at apex, with 1 strong seta and some fine setulae. Surstyli brown. Cercus rounded-ovate, serrate at apex, with falcate setae, yellow-grey, darker along distal margin. Female: Unknown.
diagnosis
Diagnosis. This species keys to D. brevifacies Stackelberg and D. acutangulus Negrobov (see key above). Legs with partly black femora; postpedicel with obtuse apex; clypeus not reaching lower eye margin; mid femur with 2 and hind femur with 1 anterior preapical setae; M 1 + 2 with strong but gentle curvation; costa with short thickening at R 1; lower calypter with yellow-white cilia.
distribution
Distribution. Dolichopus lantsovi is known from the two arctic regions of Siberia, i. e. from easternmost point of the Yamal Peninsula (at latitude 68 º 30 ’) and from westernmost point of the Taimyr Peninsula (at latitude 73 º 30 ’).
etymology
Etymology. The species is named after the Russian dipterist Dr. V. Lantsov, who collected the holotype.
materials_examined
Type material. Holotype 3, Russia: Taimyr Peninsula, Ragozinka river bank, 16. VII. 1990, V. Lantsov [ZIN]. Paratype: Russia: 13, Middle Yamal, Nurma-Yakha River, Malaise trap, 12 – 17. VII. 1991 [ZIN].