Rhamphomyia (Pararhamphomyia) hoeli : Frey 1955
- Dataset
- The empidoid flies (Diptera: Empidoidea, exclusive of Dolichopodidae) of the Russian Arctic islands and Svalbard Archipelago
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Insecta
- order
- Diptera
- family
- Chironomidae
- genus
- Rhamphomyia
- species
- Rhamphomyia hoeli
description
(Fig. 34)
distribution
Distribution. Holarctic; in North America, R. hoeli is known from the low and high arctic region east of Hudson Bay and Greenland (Sinclair et al. 2019); in Eurasia, it is recorded only from Wrangel Island. Habitat. On Wrangel Island this species was collected mainly in valleys of rivers and streams as well as some wet biotopes.
materials_examined
Material examined. Russia. Chukotka AO (Wrangel Island): Somnitelnaya Bay, on flower of Dryas integrifolia, spotted tundra, 19. vii. 1966, KBG (2 ♂, 2 ♀, ZIN); environs of pass Vjuchny, NW Somnitelnaya Bay, 21. vii. 1972, KBG (1 ♂, ZIN); 5 km N Somnitelnaya Bay, valley of Somnitelnaya River, small meadow, 25. vii. 1972, KBG (2 ♀, ZIN); same locality, 7 – 8. vii. 1972, KBG (2 ♀, ZIN); Somnitelnaya Bay, valley of Somnitelnaya River, Mineev Mtns, 150 m, pebbles, on flower of Potentilla emarginata, 22. vii. 1966, KBG (7 ♂, 3 ♀, ZIN); near north slope of Berri Peak, 6 km ESE Sovetskaya Mtn, 15. vii. 1972, KBG (5 ♂, 2 ♀, ZIN); upper flow of Khischniki River, 7 km SE mountain Sovetskaya, Dryas tundra near river, 200 m, 11. vii. 1972, KBG (7 ♂, 2 ♀, ZIN); middle flow of Mamontovaya River, N Perkatkun, osier-bed in river valley, 17,22. vii. 1972, KBG (8 ♂, 1 ♀, ZIN); same locality, 71 ° 10 ′ N 179 ° 45 ′ W, BT 20 A, YPT, 2 – 4. vii. 2015, OAK (1 ♂, ZIN); spurs of Pervaya Mtn, 71 ° 09 ′ N, 179 ° 27 ′ W, BT 11, Sw, 28. vi. 2015, OAK (2 ♂, ZIN); same locality, BT 14, Sw, 28. vi. 2015, OAK (1 ♂, ZIN); upper flow of Neizvestnaya River, 71 ° 13 ′ N, 179 ° 19 ′ W, BT 5 А, 26. vi. 2006, OAK (1 ♂, ZIN); same locality and biotope, 26. vi. 2015, OAK (1 ♂, ZIN). Recognition. Rather small species (wing length 3.5 – 4.2 mm) with dark legs and densely pruinescent thorax and abdomen. Male (Fig. 34) holoptic; antenna dark brown; scutum brownish grey with two indistinct darker vittae between rows of acr and dc (dorsal view); thorax dark setose, upper proepisternum in front of spiracle with 0 – 2 short setae; mesonotal setae well differentiated, bristle-like, acrostichals and dorsocentrals long, 1 – 2 - serial, 2 – 3 npl, 4 sctl; spiracles dark brown; legs dark setose, fore coxa with fine setae anteriorly, tibiae and tarsomeres slender; mid tibia with 2 – 3 anterodorsal setae (except 1 long seta of subapical circlet), about 2 X as long as tibial width; hind tibia with moderately long strong setae dorsally, 1 seta in posteroapical comb; hind femur with complete row of anteroventral setae (longest subapical setae nearly as long as femur width), hind basitarsus only with short setae dorsally; wing whitish, CuA + CuP evanescent apically, not quite reaching wing-margin or extended as faint fold, basal costa seta present, axillary incision right-angled, halter pale brown to yellow; abdomen greyish, paler than thoracic pleuron, dark setose; terminalia small; cercus shorter than epandrium, with broad base, tapered at midlength to narrow apical portion, covered with short setulae; subepandrial lobe present, cylindrical, with pointed apex, projecting slightly farther than cercus; epandrium subtriangular, tapered to truncate, slightly bilobed setose apex, curved medially, outer apex with cluster of long, dark stout setae; hypandrium short, boot-shaped, ending in middle of swollen phallus base; phallus short, gently arched between epandrial lamellae, not forming loops, base swollen, apex with shallow S-shaped curvature. Female similar to male, except eyes dichoptic; wing slightly infuscate, CuA + CuP entirely sclerotized, brownish; leg chaetotaxy reduced, without pennate setae.