Heleodromia irwini Wagner

• Main Authors: Shamshev, Igor V., Sinclair, Bradley J., Khruleva, Olga A.
• Format: Text
• Language: unknown
• Published: Zenodo 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Brachystomatidae; Heleodromia; Heleodromia irwini; Arctic; Svalbard; Svalbard Archipelago; Canada; Thumb; Seta; Sinclair; Wrangel Island; Jonassen; Neozhidannaya; Chukotka; Russian Arctic islands; Tundra
• Online Access: https://dx.doi.org/10.5281/zenodo.4407567; https://zenodo.org/record/4407567

Heleodromia irwini Wagner Heleodromia irwini Wagner, 1985: 37. Type locality: Scotland, Moray, Dorback Burn, UK. Other references: Sinclair et al ., 2011: 641 (revision, redescription); Shamshev, 2016: 17 (checklist). Material examined. RUSSIA. Chukotka AO (Wrangel Island): middle flow of river Neozhidannaya, 71°01′N 179°09′E, YPT, BT 4, 12–16.vii.2016, LFV (1 ♂, ZIN). Recognition. Small greyish delicate flies (body length 3–3.5 mm) with very slender legs almost lacking distinct setae, eyes dichoptic in both sexes, separated by broad V-shaped flattened frons; legs black to reddish brown, “knees” often somewhat paler; habitually very similar to H . pullata (Fig. 2, see below). Male terminalia large, reniform; tergite 8 not broader than sternite 8, only produced medially as a shallow bilobed to forked projection and lacking posterolateral projection (Sinclair et al . 2011: 641, fig. 10); epandrial lobe slender, finger-like, bearing apical seta; surstylus slender, finger-like, with scattered setae, with small preapical thumb-like projection medially; apex with short dentiform process; phallus with slender, needle-like apex. Distribution. Holarctic. The distribution of this species appears to be represented by widely disjunct populations exhibiting boreo-alpine connections in Europe and North America (Plant 2005; Plant et al . 2017; Sinclair et al . 2011). Our record of H . irwini from Wrangel Island may support this suggestion. In Eurasia, this species is known from Austria, Germany, Italy, Switzerland, Scotland and the Far East of Russia (Amurskaya and Magadanskaya Provinces); in North America, it is recorded from western part of Canada and USA. It seems that H. irwini is found here for the first time from the tundra zone. Habitat. The species was collected in wetlands in a river valley. : Published as part of Shamshev, Igor V., Sinclair, Bradley J. & Khruleva, Olga A., 2020, The empidoid flies (Diptera: Empidoidea, exclusive of Dolichopodidae) of the Russian Arctic islands and Svalbard Archipelago, pp. 1-75 in Zootaxa 4848 (1) on pages 7-8, DOI: 10.11646/zootaxa.4848.1.1, http://zenodo.org/record/4406987 : {"references": ["Wagner, R. (1985) A revision of the genus Heleodromia (Diptera, Empididae) in Europe. Aquatic Insects, 7, 33 - 43. https: // doi. org / 10.1080 / 01650428509361196", "Sinclair, B. J., Brooks, S. E., Cumming, J. M. & Coovert, G. A. (2011) Revision of the Nearctic species of Heleodromia (Diptera: Empidoidea: Brachystomatidae). The Canadian Entomologist, 143, 629 - 651. https: // doi. org / 10.4039 / n 11 - 036", "Shamshev, I. V. (2016) An annotated checklist of empidoid flies (Diptera: Empidoidea, except Dolichopodidae) of Russia. Proceedings of the Russian Entomological Society, 87, 3 - 183.", "Plant, A. (2005) Heleodromia irwini Wagner (Diptera: Empididae), an English boreo-alpine relict? British Journal of Entomology and Natural History, 18, 263.", "Plant, A. R., Jonassen, T., Grootaert, P., Meyer, H., Pollet, M. & Drake, M. (2017) The arrow points north-endemic areas and post-Devensian assembly of the British Empidoidea fauna (Insecta: Diptera). Biological Journal of the Linnean Society, 120, 852 - 868. https: // doi. org / 10.1093 / biolinnean / blw 011"]}