Dolichopus tundrensis Barkalov, Negrobov et Grichanov
- Dataset
- The Dolichopus planitarsis species group in the Palearctic Region with the description of a new species from the Russian Altai (Diptera: Dolichopodidae)
- Rank
- SPECIES
- Published in
- Barkalov, Anatolii V., Negrobov, Oleg P., Ya, Igor (2009): The Dolichopus planitarsis species group in the Palearctic Region with the description of a new species from the Russian Altai (Diptera: Dolichopodidae). Zootaxa 2268: 59-64, DOI: 10.5281/zenodo.190884
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Insecta
- order
- Diptera
- family
- Dolichopodidae
- genus
- Dolichopus
- species
- Dolichopus tundrensis
description
Description. Male: Body length: 5.5 mm, wing length: 6.5 mm, wing width: 2.4 mm, antenna length: 1.4 mm, hypopygium length: 2.2 mm. Head: Face grey, not reaching lower eye margin, in middle wider than postpedicel height (2.0 / 1.7). Proboscis dark-brown and palpus light-brown, with black hairs. Frons shining bronze, metallic green laterally, weakly grey pollinose along eyes and antennal sockets. Antenna (Figs. 1 – 2) black, with somewhat elongate segments; scape enlarged, flattened dorsoventrally, with strong dorso-lateral setae; postpedicel lanceolate, with pointed apex; stylus strictly subapical, densely shortly haired, simple. Ratio of postpedicel length to its width to stylus length, 34 / 18 / 45. Lower postocular setae black. Thorax: metallic green; mesonotum grey pollinose, with two narrow brown longitudinal stripes; propleuron with 1 strong black seta below, small fine hairs in middle and short black seta above. Legs: mainly yellow; pulvilli snow-white. Coxae green, densely grey pollinose; fore coxa with black hairs. Fore femur brownish dorsally in basal half. Mid and hind femora with 1 strong anterior preapical seta; hind femur with long yellow ventral hairs, in middle as long as femora diameter. Fore tibia with 3 long and 1 short anterodorsal, 3 posterodorsal and 4 posteroventral setae, without apicoventral seta. Fore tarsus simple, slightly compressed laterally, with segments 1 – 2 yellow, dark at apex, and segments 3 – 5 black. Mid tibia with 5 antero- and 2 posterodorsal, 2 anteroventral and 1 ventral setae. Mid basitarsus without strong setae; mid tarsomeres with black ventral setulae; segments 1 - 4 yellow, with dark apices; segment 4 hardly thickened at apex; segment 5 black, flattened dorsoventrally, with anterior and posterior rows of strong setae. Hind tibia slightly thickened at apex, with 6 – 7 long strong anterodorsal, 6 posterodorsal, a row of short black ventral setae; tibial organ in form of elongate swelling, brown basally, with a row of short white hairs. Hind tarsus black, simple. Hind basitarsus with 3 strong dorsal, 2 short anterior setae. Tarsomere length ratio: fore tarsus (from first to fifth): 52 / 20 / 15 / 10 / 15, mid tarsus: 82 / 40 / 32 / 24 / 22, hind tarsus: 84 / 62 / 44 / 31 / 20. Wing: mostly hyaline, brownish anteriorly and along M 1 + 2. Costal thickening at R 1 weakly developed; Ratio of part of costa between R 2 + 3 and R 4 + 5 to that between R 4 + 5 and M 1 + 2: 31 / 13. Distal part of CuA 1 longer than m-cu (23 / 13). Hind margin of wing with emargination at CuA 1. Lower calypter yellow, with black cilia. Halter yellow. Abdomen: metallic green, laterally and ventrally grey pollinose. Hypopygium black, shining ventrally, grey pollinose dorsally. Apicoventral epandrial lobe dark-yellow, broad, angular at apex, with 1 strong seta. Cercus yellow, broadly black along distal margin, elongate-ovate, deeply serrate at apex, with long falcate marginal setae distoventrally. Female: Unknown.
diagnosis
Diagnosis. This species is related to D. annulitarsis Ringdahl and D. planitarsis Fallén (see key above), differing mainly in antennal morphology and leg color. Antennal scape enlarged, flattened dorsoventrally; stylus nearly apical; femora almost entirely yellow; mid tarsomeres 1 – 4 yellow with dark apices. Based on the presence of yellow femora, the new species is included in group IV (Stackelberg 1930 a; Parent 1938) and keys to D. amginensis Stackelberg, 1928, that has simple mid tarsus and hind femur without ventral setulae, different leg setation and antennal morphology.
distribution
Distribution. Dolichopus tundrensis is only known from the high-mountain tundra locality in Altai Mountains, i. e. from the Plateau (Table) Ukok.
etymology
Etymology: ' Tundra' is a biome where the tree growth is hindered by low temperatures and short growing seasons.
materials_examined
Type material. Holotype 3: Russia: Republic of Altai, Kosh-Agach district, Plateau Ukok, Lake Muzdy- Bulak env., 2400 m, 49.26 ºN, 87.65 ºE, 8. VII. 2008, Coll. A. Barkalov, sweeping on sedge along lake bank [SZM].