taxonID	type	description	language	source
0B149642A5752D4241DCFAEDFD35FB5E.taxon	description	(Figs. 1 – 2)	en	Makarchenko Usgs, Eugenyi A. (2021): Confirmation of a species status of Diamesa leoniella Hansen, 1976, stat. resurr (Diptera, Chironomidae) from North America. Zootaxa 4985 (3): 439-442, DOI: https://doi.org/10.11646/zootaxa.4985.3.11
0B149642A5752D4241DCFAEDFD35FB5E.taxon	materials_examined	Material examined. 1 adult male, U. S. A.: Alaska, Juneau City, Mendenhall Lake, N 58.4217 E 134.5388, 26. III. 2013, leg. K. Frangos and P. Hudson; 1 adult male, the same data except Nugget Falls, N 58.4270 E 134.5373, 17. VII. 2013, leg. P. Hudson. Adult male (n = 2). Total length 4.7 mm. Wing length 2.56 – 3.44 mm. Total length / wing length 1.37. Colouration. Head, thorax, legs and hypopygium dark brown; antenna brown; palpomeres light brown; abdomen light brown to brown; wing greyish, veins brownish. Head. Eyes hairy, i. e., length of eye microtrichia about 1.5 or more times the height of ommatidial lenses and visible along lateral eye margin when head is viewed from front (Hansen & Cook 1976). Frontal tubercles 16 – 44 μm long, covered with microtrichia. Temporal setae including about 13 – 15 verticals, 8 – 12 preoculars, 5 postorbitals. Clypeus with 5 – 6 setae. Antenna with 8 flagellomeres and reduced plume of setae; flagellomeres 1 – 7 with 2 – 3 setae, 24 – 40 μm long; terminal flagellomere in basal part with 4 – 5 setae, 60 – 72 μm long and with 2 subapical setae, 16 – 20 μm long. Flagellomeres 1 – 8 length (μm): 88 – 104, 36 – 40, 40, 32, 32, 26 – 32, 32 – 44, 164 – 248; AR 0.41 – 0.78. Antennal length / palp length 1.09 – 1.21. Palpomeres lengths (in μm): 32 – 40; 56 – 64; 108; 84 – 100; 136 – 156. Palpomere 3 in distal part with sensilla capitata with diameter 20 μm. Palpomeres 1 – 5 length / head width 0.92. Thorax. Antepronotum with 9 – 11 ventrolateral setae. Dorsocentrals 5 – 7, prealars 7, scutellars 9 – 11. Wing. R and R 1 with 25 – 34 setae; R 4 + 5 with 18 – 19 setae. Costa extension 52 – 60 μm long. RM length / MCu length 2.8 – 3.5. Anal lobe slightly reduced, angularly. Squama with 14 – 17 setae, 52 – 68 μm long. VR 0.96 – 1.0. Legs. Spur of fore tibia 40 – 44 μm long; spurs of mid tibia 44 μm long; of hind tibia 74 – 80 μm and 44 – 48 μm long. Hind tibial comb with 15 – 16 setae. Lengths and proportions of leg segments as in Table 1. Hypopygium (Figs. 1 – 2). Tergite IX with 11 – 13 setae (from one side), 16 – 24 μm long and wedge-shaped anal point 100 – 140 μm long, covered in basal half with numerous microtrichia forward and laterally directed. Laterosternite IX with 10 – 11 short setae. Transverse sternapodeme triangular 128 μm long. Gonocoxite 400 – 496 μm long. Inferior volsella finger-like, 40 – 48 μm long and 24 μm width, covered with short setae and microtrichia. Superior volsella collar-like, covered with microtrichia and short setae. Gonostylus slightly curved, 212 – 246 μm long, with numerous, proximally directed strong setae 48 – 64 μm long; megaseta 6 – 8 μm long. HR 1.65 – 1.93. Diagnostic characters. Male of D. leoniella is very closely related to D. japonica and distinguished from later by the following main features: 1 — antennal flagellomeres 1 – 7 with 2 – 3 short setae, 2 — inferior volsella finger-like, covered with short setae and microtrichia, 3 — superior volsella collar-like, covered with microtrichia and short setae. Male of D. japonica: 1 – without setae on flagellomeres 4 – 7, 2 — inferior volsella absent, 3 — superior volsella in form of an angular tubercle.	en	Makarchenko Usgs, Eugenyi A. (2021): Confirmation of a species status of Diamesa leoniella Hansen, 1976, stat. resurr (Diptera, Chironomidae) from North America. Zootaxa 4985 (3): 439-442, DOI: https://doi.org/10.11646/zootaxa.4985.3.11
0B149642A5752D4241DCFAEDFD35FB5E.taxon	distribution	Distribution. Nearctic species. Known from U. S. A. — California, Montana, Utah, Washington, Wyoming (Hansen & Cook 1976) and Alaska (recorded for the first time).	en	Makarchenko Usgs, Eugenyi A. (2021): Confirmation of a species status of Diamesa leoniella Hansen, 1976, stat. resurr (Diptera, Chironomidae) from North America. Zootaxa 4985 (3): 439-442, DOI: https://doi.org/10.11646/zootaxa.4985.3.11
0B149642A5742D4041DCFA89FDF5FE12.taxon	description	(Figs. 3 – 4)	en	Makarchenko Usgs, Eugenyi A. (2021): Confirmation of a species status of Diamesa leoniella Hansen, 1976, stat. resurr (Diptera, Chironomidae) from North America. Zootaxa 4985 (3): 439-442, DOI: https://doi.org/10.11646/zootaxa.4985.3.11
0B149642A5742D4041DCFA89FDF5FE12.taxon	materials_examined	Material examined. 2 adult males, Russia: Kurile Islands, Kunashir Island, Sernovodsk Village, Tiurino River, 24. IV. 1978, leg. E. Makarchenko; 23 adult males, the same data except 26. IV. 1978, leg. E. Makarchenko. Adult male (n = 12). Total length 3.1 – 4.0 mm. Wing length 2.76 – 3.17 mm. Total length / wing length 0.90 – 1.38. Colouration. Head, thorax, legs and hypopygium dark brown; antenna and palpomeres brown; abdomen light brown to dark brown; wing greyish, veins brownish. Head. Eyes hairy. Temporal setae including 12 – 15 verticals, 6 – 12 preoculars, 4 – 5 postorbitals. Clypeus with 6 – 8 setae. Antenna with 8 flagellomeres and reduced plume of setae; number and length of these setae on 1 – 7 flagellomeres respectively: 2 – 3 (28 – 40 μm), 1 – 2 (28 – 36 μm), 1 – 2 (26 – 40 μm), 0, 0, 0, 0; terminal flagellomere in basal part with 5 – 6 setae, 60 – 80 μm long and with 2 subapical setae, 40 – 52 μm long. Flagellomeres 1 – 8 length (μm): 71 – 88, 34 – 38, 25 – 34, 25 – 30, 25 – 34, 25 – 34, 34 – 38, 193 – 218; AR 0.68 – 0.81. Antennal length / palp length 1.05 – 1.11. Palpomeres lengths (in μm): 36 – 40; 55 – 63; 88 – 105; 76 – 105; 105 – 147. Palpomere 3 in distal part with sensilla capitata with diameter 20 – 24 μm. Palpomeres 1 – 5 length / head width 0.80 – 0.84. Thorax. Antepronotum with 7 – 12 ventrolateral setae. Dorsocentrals 6 – 10, prealars 5, scutellars 11 – 24. Wing. R and R 1 with 15 – 25 setae; R 4 + 5 with 8 – 12 setae. Costa extension ca 48 μm long. RM length / MCu length 2.0 – 3.6. Anal lobe well developed, rounded. Squama with 18 – 25 setae 28 – 52 μm long. VR 0.96 – 1.0. Legs. Spur of fore tibia 34 – 46 μm long; spurs of mid tibia 46 – 55 μm long; of hind tibia 50 – 71 μm and 34 – 50 μm long. Hind tibial comb with 16 – 20 setae. Lengths and proportions of leg segments as in Table 2. Hypopygium (Figs. 3 – 4). Tergite IX with 10 – 11 setae (from one side), 20 – 28 μm long and wedge-shaped anal point 63 – 136 μm long, covered in basal 2 / 3 with numerous microtrichia forward and laterally directed. Laterosternite IX with 9 – 10 short setae. Transverse sternapodeme triangular ca 128 μm long. Gonocoxite 350 – 476 μm long. Inferior volsella absent. Superior volsella in form of angular tubercle. Gonostylus slightly curved, 220 – 236 μm long, with numerous, proximally directed strong setae, 44 – 52 μm long; megaseta 6 – 8 μm long. HR 1.92 – 2.23.	en	Makarchenko Usgs, Eugenyi A. (2021): Confirmation of a species status of Diamesa leoniella Hansen, 1976, stat. resurr (Diptera, Chironomidae) from North America. Zootaxa 4985 (3): 439-442, DOI: https://doi.org/10.11646/zootaxa.4985.3.11
0B149642A5742D4041DCFA89FDF5FE12.taxon	distribution	Distribution. East Palaearctic island species. Known from Japan and Russian Far East (Kunashir Island, Kurile Islands (Ashe & O’Connor 2009).	en	Makarchenko Usgs, Eugenyi A. (2021): Confirmation of a species status of Diamesa leoniella Hansen, 1976, stat. resurr (Diptera, Chironomidae) from North America. Zootaxa 4985 (3): 439-442, DOI: https://doi.org/10.11646/zootaxa.4985.3.11
