120 research outputs found

    The 2nd Chinese Symposium on Chironomidae

    Get PDF

    Microchironomus tabarui Sasa

    No full text
    <i>Microchironomus tabarui</i> Sasa <p>(Fig. 3 A–E)</p> <p> <i>Microchironomus tabarui</i> Sasa 1987: 63; Sasa 1988: 56</p> <p> <b>Material examined:</b> Tianjin City, 3 males, 3. V. 1979, 20. VI. 1985, X. Wang; Hebei Province, Qinhuangdao City, 1 male, 4. VI. 1985, X. Wang; Jiangsu Province, Suzhou City, 3 males, VIII. 2003, X. Wang. Hubei Province, Wuhan University, 1 male, 29. X. 2003, sweep net, X. Wang; Guizhou Province, Libo County, 420 m, 1 male, 7. VIII. 1995, light trap, W. Bu.</p> <p> <b>Diagnostic characters:</b> The species can be distinguished from others by the superior volsella with several long and short setae, and the anal point short, broadest basally, and often expanded and truncated apically.</p> <p> <b>Male imago</b> (<i>n</i> = 9, unless otherwise stated)</p> <p>Total length 3.13–4.70, 3.65 mm. Wing length 1.45–2.05, 1.68 mm. Total length/wing length 1.72–2.45, 2.19. Wing length/length of profemur 2.26–2.70, 2.41.</p> <p>Coloration: Thorax dark brown to yellow green, femora and distal 1/3 of tibia of front leg yellowish green, remaining parts of front leg dark brown, mid and hind legs yellowish green, only tarsi 5 dark brown (Fig. 3 A) or distal 1/3 of tarsi 1 and tarsi 2–5 dark brown (Fig. 3 B). Abdomen yellowish green to brown.</p> <p>Head: AR 1.96–2.56, 2.36. Ultimate flagellomere 530–700, 592 µm long. Frontal tubercles present, columnar, 10–13 (2) µm long, 7–10 (2) µm wide; or rounded, 4–5, 4 (4) µm in diameter. Temporal setae 6–12, 9; including 0–4, 2 inner verticals; 2–5, 4 outer verticals; and 3–6, 4 postorbitals. Clypeus with 11–20, 15 setae. Tentorium 120–155, 137 (6) µm long, 25–36, 30 (6) µm wide. Palpomere lengths (in µm): 32–48, 38; 37–58, 46; 93–120, 102; 100–165, 143; 180–220, 197; 150 µm long, 50 µm wide. Palpomere lengths (in µm): 37; 55; 188; 160; 178. Palp segment 5th/3rd 1.72–2.12, 1.95.</p> <p>Thorax: Antepronotals 0–7, 4, acrostichals 0–9, 5, dorsocentrals 8–10, 9, prealars 2–4, 3. Scutellum with 3–9, 6 setae.</p> <p>Wing (Fig. 3 C): VR 1.08–1.16, 1.11, R with 0–6, 2 setae, R1 with 0–1, 0 setae, R4+5 with 2 setae at apex. Brachiolum with 2 setae. Squama with 12–28, 17 (5) setae.</p> <p>Legs: Front tibia with 2 subapical setae, 75–100, 89 (8) and 65–87, 76 (5) µm long, spurs of middle tibia 16–24, 19 and 19–25, 22 µm long, comb with 23–32, 27 teeth, 8–10, 8 µm long; spurs of hind tibia 20–25, 23 and 25–30, 26 µm long, comb with 30–40, 35 teeth, 8–10, 10 µm long. Tarsus 1 of mid leg with sensilla chaetica 11–19, 15. Lengths (in µm) and proportions of legs as in Table 3.</p> <p>Hypopygium (Fig. 3 D, E): Tergite IX with 7–10, 8 setae. Laterosternite IX with 2–5, 4 setae. Anal point 50–62, 54 µm long, 25–33, 29 µm wide at base, 18–25, 21 µm wide at apex, with 12–18, 14 setae beside ridge. Ninth tergite with pair of rounded processes on posterior margin flanking anal point, bearing 8–12, 10 setae and microtrichia. Superior volsella digitiform, 50–88, 66 µm long with 4 or 5, 5 setae apically and 4–12, 7 short setae. Anal tergite bands T shaped. Phallapodeme 55–98, 78 µm long. Transverse sternapodeme 35–63, 49 µm long. Gonocoxite 105–137, 121 µm long, with 3–5, 4 strong setae along inner margin. Gonostylus 183–225, 198 µm long with apical hook, inner margin expanded basally, and bearing 22–28, 24 setae in 2 rows along inner margin. HR 0.47–0.73, 0.62, HV 1.66–2.09, 1.84.</p> <p> <b>Distribution:</b> The species was previously recorded from Japan (Palaearctic Region). It also was collected by sweep net and light trap from Palaearctic and Oriental China. The species is a new record for China.</p> <p> <b>Remarks:</b> In the Chinese specimens, the middle of the anal point has a setose ridge.</p>Published as part of <i>Yan, Chuncai & Wang, Xinhua, 2006, Microchironomus Kieffer from China (Diptera: Chironomidae), pp. 53-68 in Zootaxa 1108</i> on pages 59-61, DOI: <a href="http://zenodo.org/record/171476">10.5281/zenodo.171476</a&gt

    Microchironomus tener Kieffer

    No full text
    <i>Microchironomus tener</i> (Kieffer) <p>(Fig. 4 A–G)</p> <p> <i>Chironomus tener</i> Kieffer 1918: 48</p> <p> <i>Cladopelma sinuosus</i> Kieffer 1924: 393</p> <p> <i>Cryptochironomus aegyptius</i> Kieffer 1925: 288</p> <p> <i>Chironomus</i> (<i>Cryptochironomus</i>) <i>tener</i> Kieffer Goetghebuer 1928: 174</p> <p> <i>Chironomus</i> (<i>Cryptochironomus</i>) <i>balticus</i> Pagast 1931: 218</p> <p> <i>Chironomus</i> (<i>Cryptochironomus</i>) <i>primitivus</i> Johannsen 1932: 531, Sublette <i>et al</i>. 1973: 405, Saether 1977: 101, Wang <i>et al</i>. 1977: 231</p> <p> <i>Tendipes</i> (<i>Parachironomus</i>) <i>tener</i> Kieffer Krusenman 1933: 125</p> <p> <i>Chironomus</i> (<i>Cryptochironomus</i>) <i>aegyptius</i> Goetghebuer 1936: 469</p> <p> <i>Chironomus forcipatus</i> Freeman 1954: 20, 1957: 394, 1961a: 699</p> <p> <i>Leptochironomus tener</i> (Kieffer) Kugler 1971: 341, Shilova 1976: 118 –119, Pinder 1978: 126</p> <p> <i>Microchironomus tener</i> (Kieffer) Saether 1977: 101; Freeman and Cranston 1980: 193; Moller–Pillot 1984: 244; Chaudhuri and Chattopadhyay 1988: 177, 1990: 160; Sasa and Kawai 1987: 61; Kikuchi and Sasa 1990: 300; Sasa 1991: 82; Sasa <i>et al</i>. 1999: 186; Wang <i>et al</i>. 1991: 10; Wang 2000: 645</p> <p> <i>Cryptochironomus tener</i> (Kieffer) Wang <i>et al</i>. 1977: 230</p> <p> <i>Parachironomus tener</i> (Kieffer) Hashimoto <i>et al</i>. 1981: 19</p> <p> <b>Material examined:</b> Tianjin City, Jixian County, Yuqiao Reservoir, 1 male, 2. X. 1986, X. Wang; Hebei Province, Panjiakou Reservoir, 1 male, 25. IX. 2001, sweep net, R. Zhang; Shanxi Province, Taiyuan City, 1 male, 10. VII. 1987, F. Han; Zhejiang Province, Qingyuan County, Baishanzu, Chameixu, 1300 m, 1 male, 18. IV. 1994, H. Wu; Anhui Province, Tongling City, 3 males, 30. VII. 1994, light trap, X. Wang; Fujian Province, Jianning County, 3 males, 26. IX. 2002, light trap, Z. Liu; Jiangxi Province, Poyang Lake, Nanjishan Natural Conversation, 5 males, 12. VI. 2004, sweep net, light trap, C. Yan; Shandong Province, Zaozhuang City, Beizhuang Town, 2 males, 28. V. X. Wang; Hubei Province, Hefeng County, Fenshuiling, 1200 m, 3 males, 16. VII. 1999, B. Ji; Guangdong Province, Fengkai County, Heishiding, 2 males, 19–20. IV. 1988, sweep net, light trap, X. Wang; Hainan Province, Changjiang County, Bawangling Natural Conversation, 7 males, 11. V. 1988, light trap, X. Wang; Hainan Province, Jianfengling Natural Forest Park, 2 males, 15. IV. 1988, X. Wang; Sichuan Province, Xichang City, 1 male, 4. VI. 1996, light trap, X. Wang; Guizhou Province, Libo County, Maolan Town, 500–700 m, 3 males, 3. VIII. 1995, light trap, W. Bu; Guizhou Province, Luodian County, 2 males, 9. VIII. 1995, sweep net, W. Bu; Yunnan Province, Dali City, Zhonghelin, 200m, 2030–2800 m, 43 males, 22. V. 1996, light trap, X. Wang & Y. Du; Yunnan Province, Dali City, Guancangshan, Qingbixi, 2370–2520 m, 12 males, 23. V. 1996, light trap, Y. Du & B. Wang; Yunnan Province, Dali City, Yinqiao, 2000 m, 10 males, 21. V. 1996, X. Wang; Yunnan Province, Dali City, Erhai, 2000 m, 9 males, 23. V. 1996, light trap, X. Wang; Yunnan Province, Jinghong City, 4 males, 3. IV. 1987, H. Zou; Yunnan Province, Lijiang County, Shigu Town, Chongjianghe River, 1850 m, 4 males, 25. V. 1996, B. Wang & C. Zhou; Yunnan Province, Jianfeng County, 3 males, 17. V. 1988, X. Wang; Yunnan Province, Huaping County, Xinzhuang village, Liangmahe River, 2 males, 30. V. 1996, light trap, X. Wang; Yunnan Province, Dali City, Hudiequan, 1 male, 23. 5. 1996, X. Wang; Yunnan Province, Eryuan County, Niujie Town, Futian village, Meicihe river, 2332 m, 1 male, 11. VIII. 1998, light trap, B. Wang; Gansu Province, Linze County, 1 male, 22. VI. 1993, light trap, G. Liu; Ningxia Province, Yinchuan City, 5 males, 26. VII. 1987, X. Wang; Taiwan Province, 7 males, 2000, 2003, K. Ma.</p> <p> <b>Male imago</b> (<i>n</i> = 26, unless otherwise stated)</p> <p>Total length 2.10–3.98, 3.08 mm. Wing length 1.00–2.00, 1.41 mm. Total length/wing length 1.95–2.85, 2.12. Wing length/length of profemur 2.30–2.78, 2.58.</p> <p>Coloration: Eyes slightly brown or black brown. Color of thorax variable, entirely brown or slightly yellowish, with black vittae, ventral 2/3 of preepisternum, most of anepisternum, and anterior 1/2 of postnotum black (Fig. 4 A); brown with 1/3 of preepisternum and postnotum black or only 1/3 of postnotum black. Femora and distal 1/3 of tibia of front leg yellowish brown, remaining parts of front leg dark brown, mid and hind legs yellowish brown, or tarsi 2–5 or tarsi 4–5 dark brown. Abdomen yellowish green to brown and dark brown in middle (Fig. 4 B) or entirely brown.</p> <p>Head: AR 1.33–2.06, 1.72. Ultimate flagellomere 350–650, 501 µm long. Frontal tubercles present or absent, if present, cylindrical, 8–25 µm long, 4–13 µm wide, or rounded 3–8 µm in diameter. Temporal setae 5–15, 8, including 1–6, 2 inner verticals, 1–5, 2 outer verticals, and 2–6, 4 postorbitals. Clypeus with 10–18, 13 (21) setae. Tentorium 100–130, 117 (20) µm long, 15–32, 20 (20) µm wide. Palpomere lengths (in µm): 25–40, 31; 30–50, 38; 63–125, 86; 83–145, 112; 115–185, 147. Palp segment 5th/3rd 1.46–2.22, 1.73.</p> <p>Thorax: Antepronotals 1–6, 3 (16), acrostichals 3–8, 5 (19), dorsocentrals 5–11, 7 (21), prealars 2–4, 3 (18). Scutellum with 3–9, 5 (20) setae.</p> <p>Wing (Fig. 4 C): VR 1.10–1.29, 1.19 (24), R with 0–8, 3 setae, R1 without setae, R4+5 with 2 setae at apex. Brachiolum with 2 setae. Squama with 4–13, 7 (12) setae.</p> <p>Legs: Front tibia with 2 subapical setae, 60–120, 73 (17) and 55–80, 70 (8) µm long, spurs of middle tibia 12–22, 16 µm and 14–23, 18 µm long, comb with 16–30, 19 teeth, 8– 10, 8 µm long, spurs of hind tibia 14–23, 18 µm and 18–28, 22 µm long, comb with 18–40, 25 teeth, 8–10, 10 µm long. Tarsus 1 of mid leg with sensilla chaetica 2–28, 12 (23). Lengths (in µm) and proportions of legs as in Table 4.</p> <p>Hypopygium (Fig. 4 D–G): Tergite IX with 10–20, 14 setae at base of anal point. Laterosternite IX with 1–4, 3 setae. Anal point (Fig. 4 F–G) 65–120, 82 (22) µm long, 14– 25, 18 (22) µm wide at base, 4–8, 5 (22) µm wide at apex, slender, widest at base and slightly constricted medially, sometimes with tubercle on ventral side of base, bearing 6– 15 (14) setae and numerous microtrichia. Ninth tergite with pair of low tubercles on posterior margin near base of anal point, with 4–12, 6 (24) setae and covered by microtrichia. Superior volsella 45–75, 56 µm long with 3–4, 3 (25) setae and without microtrichia. Anal tergite bands V or Y shaped. Phallapodeme 75–120, 78 µm long. Transverse sternapodeme 30–62, 47 µm long. Gonocoxite 70–120, 84 µm long, with 3–5, 4 (24) strong setae along inner margin. Gonostylus 125–193, 154 µm long with apical tooth, swollen medially, inner margin concave, bearing 19–31, 22 setae along inner margin. HR 0.47–0.74, 0.59, HV 1.66–2.49, 2.00.</p> <p> <b>Distribution:</b> The species is widely distributed in the Afrotropical, Australasian, Oriental and Palaearctic Regions and has been recorded from 17 Chinese provinces.</p> <p> <b>Remarks:</b> Based on material examined from China and a study of the literature, the species is variable for a number of characters, including the frontal tubercles (present or absent); AR (low [1.33] or high [2.03]); tubercle of the anal point (present or absent); and coloration of the thorax, legs, and abdomen (variable). Generally, in chironomid taxonomy, this extent of variation would suggest different species. However, our study suggests that this variation is intraspecific because the structure of the genitalia and most of the other characters is nearly identical.</p> <p> Sasa (1987) recorded a new species (<i>M. ishiii</i>) from Japan, which differs from other species in the genus by having abdominal tergites II to V each with a conspicuous dark brown mark in the center, and the anal tergite with a setigerous tubercle on the ventral side of the base of the anal point (Sasa 1995). However, based on the Chinese material, these characters also can be found in <i>M. tener</i>. We, therefore, suspect that <i>M. ishiii</i> Sasa 1987 is a synonym of <i>M. tener</i> (Kieffer), but refrain from formal synonymy until the types can be examined. However, the species is not included in our key.</p>Published as part of <i>Yan, Chuncai & Wang, Xinhua, 2006, Microchironomus Kieffer from China (Diptera: Chironomidae), pp. 53-68 in Zootaxa 1108</i> on pages 61-65, DOI: <a href="http://zenodo.org/record/171476">10.5281/zenodo.171476</a&gt

    Microchironomus Kieffer

    No full text
    Key to males of <i>Microchironomus</i> Kieffer <p>1. Gonostylus without obvious projection basally............................................................ 2</p> <p>­ Gonostylus with distinct projection basally.................................................................. 3</p> <p> 2. Anal point constricted in middle; superior volsella slightly swollen and with 2 or 3 pits at apex <i>.................................................................................... M. cavus</i> sp. n. (Oriental)</p> <p> ­ Anal point nearly parallel sided; superior volsella without pits at apex......................... <i>....................................................................</i> <i>M. nigrovittatus</i> (Malloch 1915) (Nearctic)</p> <p> 3. Anal point short, apically expanded; superior volsella with 3–5 long setae and 2–12 short setae subapically <i>.............................................</i> <i>M. tabarui</i> Sasa 1987 (Palaearctic)</p> <p>­ Anal point long, parallel sided or expanded in middle; superior volsella with 1–5 long setae and without short setae......................................................................................... 4</p> <p>4. Anal point with mid ridge bearing lateral setae............................................................ 5</p> <p>­ Anal point without mid ridge, but occasionally with tubercle...................................... 6</p> <p> 5. Superior volsella 3–4 times as long as wide; AR 2.34–2.95........................................... <i>...................................</i> <i>M. deribae</i> (Freeman 1957) (Palaearctic, Afrotropical, Oriental)</p> <p> ­ Superior volsella as long as wide; AR 1.6...................................................................... <i>.............................................................. M. trisetifer</i> (Hashimoto <i>et al</i>. 1981) (Oriental)</p> <p> 6. Superior volsella with 1 seta <i>........ M. fuscitarsus</i> (Guha & Chaudhuri 1979) (Oriental)</p> <p>­ Superior volsella with 3–5 setae.................................................................................... 7</p> <p> 7. Anal point with tubercle in middle; inner process of gonostylus prominent.......................................................................... <i>M. lendli</i> (Kieffer 1918) (Palaearctic, Afrotropical)</p> <p>­ Anal point with tubercle basal or absent; inner process of gonostylus less prominent. 8</p> <p> 8. Anal point slightly expanded distally, abruptly narrowed near truncate apex................ <i>..................................................................................</i> <i>M. teruyai</i> Sasa 1990 (Palaearctic)</p> <p> ­ Anal point parallel sided or slightly expanded in middle, not abruptly narrowed.......... <i>...................</i> <i>M. tener</i> (Kieffer 1918) (Palaearctic, Afrotropical, Oriental, Australasian)</p>Published as part of <i>Yan, Chuncai & Wang, Xinhua, 2006, Microchironomus Kieffer from China (Diptera: Chironomidae), pp. 53-68 in Zootaxa 1108</i> on page 66, DOI: <a href="http://zenodo.org/record/171476">10.5281/zenodo.171476</a&gt

    Robackia Saether

    No full text
    Key to the males of Robackia Saether 1. Anal point only with basal strong setae ....................... R. demeijerei (Kruseman, 1933) - Anal point with weak setae in addition to basal strong setae........................................ 2 2. Tergite IX with shoulders.............................................................................................. 3 - Tergite IX with posterior margin rounded..................................................................... 4 3. Superior volsella swollen distally, anal point nearly parallel-sided................................ ................................................................................................ R. pilicauda Saether, 1977 - Superior volsella not swollen distally, anal point widened in apical 1 / 3........................ ................................................................................................. R. aculeata Zorina, 2003 4. Anal point constricted basally, AR 2.00– 2.44 ...................... R. claviger (Townes, 1945) - Anal point nearly parallel-sided, AR 1.30 .......................................... R. parallela sp. n.Published as part of Yan, Chuncai & Wang, Xinhua, 2006, Robackia Saether from China (Diptera: Chironomidae), pp. 53-59 in Zootaxa 1361 on page 58, DOI: 10.5281/zenodo.17468

    Microchironomus deribae Freeman

    No full text
    <i>Microchironomus deribae</i> (Freeman) <p>(Fig. 2 A–E)</p> <p> <i>Chironomus</i> (<i>Cryptochironomus</i>) <i>deribae</i> Freeman 1957: 395</p> <p> <i>Cryptochironomus deribae</i> (Freeman) Tourenq 1966: 459</p> <p> <i>Leptochironomus paraderibae</i> Laville & Tourenq 1967: 185</p> <p> <i>Leptochironomus deribae</i> (Freeman) Ringe 1970: 315; Kugler 1971: 344; Pinder 1978: 126 <i>Microchironomus deribae</i> (Freeman) Saether 1977: 101; Cranston & Judd 1989: 256; Wang <i>et al</i>. 1991: 10; Wang 2000: 645</p> <p> <b>Material examined:</b> CHINA: Tianjin City, Jixian County, Duliujianhe River, 1 male, 12.VI.1988, X. Wang; Gansu Province, Linze County, 1 male, 22.VI.1993, light trap, G. Liu; Neimenggu Autonomous Region, Xilinhaote City, Dongwuzhumuqinqi County, 910m a.s.l., 7 males, 7.VIII.1997, H. Li.</p> <p> <b>Male imago</b> (<i>n</i> = 9, unless otherwise stated)</p> <p>Total length 3.80–4.38, 4.01 mm. Wing length 1.53–2.13, 1.86 (8) mm. Total length/ wing length 1.98–2.50, 2.19 (8). Wing length/length of profemur 2.19–2.69, 2.54 (8).</p> <p>Coloration: Thorax (Fig. 2 A) dark brown, with black vittae; ventral 2/3 of preepisternum, most of anepisternum, and anterior 1/2 of postnotum black. Front legs with femora and distal 1/3 of tibia yellowish green, remaining parts of front leg dark brown, mid and hind legs yellowish green except tarsi 4 and 5 dark brown (Fig. 2 B). Abdomen yellowish green to brown.</p> <p>Head: AR 2.41–2.69, 2.53. Ultimate flagellomere 660–720, 687 µm long. Frontal tubercles rounded, 4–8, 6 (6) µm in diameter. Temporal setae 7–11, 9, including 0–1, 0 inner verticals, 2–4, 3 outer verticals, and 3–7, 5 postorbitals. Clypeus with 11–24, 15 setae. Tentorium 115–175, 137 µm long, 28–30, 29 µm wide. Palpomere lengths (in µm): 38–55, 44; 50–55, 52; 100–120, 110; 120–155, 134; 165–200, 186. Palp segment 5th/3rd 1.46–1.93, 1.70.</p> <p>Thorax: Antepronotals 0–4, 2, acrostichals 0–6, 2, dorsocentrals 4–9, 6, prealars 2–4, 3. Scutellum with 1–4, 3 setae.</p> <p>Wing (Fig. 2 C): VR 1.06–1.13, 1.10 (8), R with 4–10, 7 (5) setae, R1 without setae, R4+5 with 2 setae at apex. Brachiolum with 2 or 3, 2 setae. Squama with 16–22, 18 setae.</p> <p>Legs: Front tibia with 2 subapical setae, 50–90, 78 (7) and 70–75, 73 (2) µm long, spurs of middle tibia 13–20, 18 and 15–25, 20 µm long, comb with 22–32, 25 teeth, 8–10, 8 µm long; spurs of hind tibia 18–24, 20 and 22–26, 24 µm long, comb with 26–35, 31 teeth, 8–10, 10 µm long. Tarsus 1 of mid leg with sensilla chaetica 10–15, 13. Lengths (in µm) and proportions of legs as in Table 2.</p> <p>Hypopygium (Fig. 2 D–E): Tergite IX with 0–5, 2 setae. Laterosternite IX with 2–5, 4 setae. Anal point flake–shape, rounded apically, 60–98, 82 µm long, 25–33, 29 µm wide at base, 18–25, 21 µm wide at apex, with V­shaped ridge bearing 12– 18, 16 setae and numerous microtrichia. Ninth tergite with 2 lobes near base of anal point, with 3–4, 3 (8) setae and covered with microtrichia. Superior volsella 35–75, 47 µm long with 3 or 4, 3 setae and without microtrichia. Anal tergite bands V shaped, not united in middle. Phallapodeme 55–133, 91 µm long. Transverse sternapodeme 30–88, 54 µm long. Gonocoxite 100–138, 117 µm long, with 3–5, 4 strong setae along inner margin. Gonostylus 188–225, 210 µm long, strongly incurved and with swollen basally, and with tooth apically, bearing 18–28, 23 setae along inner margin. HR 0.44–0.73, 0.56, HV 1.69–2.12, 1.92.</p> <p> <b>Distribution:</b> The species is distributed in the Palaearctic, Afrotropical and Oriental Regions, and occurs in both Palaearctic and Oriental China.</p> <p> <b>Remarks:</b> Specimens of this species were misidentified and wrongly recorded from China as <i>Cryptochironomus chlorostolus</i> (Kieffer) by Wang <i>et al</i>. (1977).</p>Published as part of <i>Yan, Chuncai & Wang, Xinhua, 2006, Microchironomus Kieffer from China (Diptera: Chironomidae), pp. 53-68 in Zootaxa 1108</i> on pages 56-59, DOI: <a href="http://zenodo.org/record/171476">10.5281/zenodo.171476</a&gt

    Microchironomus cavus Yan & Wang, 2006, sp. n.

    No full text
    <i>Microchironomus cavus</i> sp. n. <p>(Fig. 1 A–E)</p> <p> <b>Material examined:</b> Holotype male, CHINA: Sichuan Province, Xiangcheng County, Shuoquhe River, 2750 m a.s.l., 12.VI.1996, light trap, X. Wang (BDN no. 11908). Paratype male, same data as holotype (BDN no.11907).</p> <p> <b>Diagnostic characters:</b> The new species is distinguished from other known species by the parallel­sided, slightly swollen superior volsella with two or three pits at the apex, and by the gonostylus with a strong longitudinal keel and no projection on the inner margin.</p> <p> <b>Etymology:</b> The species name is from Latin, <i>cavus</i>, meaning pit, in reference to the superior volsella, which has two or three pits.</p> <p> <b>Male imago</b> (<i>n</i> = 2, unless otherwise stated)</p> <p>Total length 4.00–4.08 mm. Wing length 2.23–2.25 mm. Total length/wing length 1.78–1.83. Wing length/length of profemur 2.35–2.47.</p> <p>Coloration: Thorax yellowish green, with brown vittae; ventral 1/3 of preepisternum, 1/3 of anepisternum, and anterior 1/2 of postnotum dark brown. Front legs dark brown except 2/3 of femora yellowish brown; mid and hind legs with basal 1/8 of tibia, distal 1/2 of tarsi, and tarsi 2–5 dark brown, remaining parts of mid and hind legs yellowish green (Fig. 1 A).</p> <p>Abdomen (Fig. 1 B) yellowish brown, with posterior 1/8 of tergites II–VI, posterior 1/3 of tergite VII, tergites VIII–IX and hypopygium dark brown.</p> <p>Head: AR 1.50–1.53. Ultimate flagellomere 600–610 µm long. Frontal tubercles cylindrical, 13–15 µm long, 7–8 µm wide. Temporal setae 20–21, including 4–5 inner verticals, 10 outer verticals, and 6 postorbitals. Clypeus with 9–12 setae. Tentorium 108– 125 µm long, 35–37 µm wide. Palpomere lengths (in µm): 37; 42–45; 150; 152–163; 200– 215. Palp segment 5th/3rd 1.33–1.43.</p> <p>Thorax: Antepronotals 2–4, acrostichals 6–8, dorsocentrals 7–8, prealars 4. Scutellum with 14 setae.</p> <p>Wing (Fig. 1 C): VR 1.11–1.13, R with 16–18 setae, R1 with 12–15 setae, R4+5 with 9– 12 setae. Brachiolum with 2–3 setae. Squama with 14 or 15 setae.</p> <p>Legs: Front tibia with 3 subapical setae, 113–130, 113–118 and 100–105 µm long; spurs of middle tibia 23 µm and 25 µm long, comb with 32–36 teeth, 10–11 µm long; spurs of hind tibia 24–25 µm and 29–31 µm long, comb with 46–52 teeth, 13 µm long. Sensilla chaetica of mid legs absent. Lengths (in µm) and proportions of legs as in Table 1.</p> <p>Hypopygium (Fig. 1 D–E): Tergite IX with 20–22 setae at base of anal point. Laterosternite IX with 3 or 4 setae. Anal point constricted in the middle and swollen in distal 1/3, 90–92 µm long, 10 µm wide at base, 15–17 µm wide medially, 7–10 µm wide at apex, with ridge covered with microtrichia in basal 1/2. Lobes of tergite IX bearing 3 setae and microtrichia. Superior volsella slender, parallel sided, 80–82 µm long, slightly swollen apically, with 2 or 3 pits at apex, with 3 subapical long setae and without microtrichia. Anal tergite bands Y shaped. Phallapodeme 106–108 µm long. Transverse sternapodeme 45–47 µm long. Gonocoxite 113–115 µm long, with 7 strong setae along inner margin. Gonostylus 208–215 µm long with apical tooth, inner margin lacking projection, concave medially and with strong longitudinal keel, bearing 18–20 setae in 2 rows along inner margin. HR 0.53–0.55, HV 1.90–1.92.</p> <p> <b>Distribution.</b> The species was collected with a light trap in Sichuan Province in Oriental China.</p>Published as part of <i>Yan, Chuncai & Wang, Xinhua, 2006, Microchironomus Kieffer from China (Diptera: Chironomidae), pp. 53-68 in Zootaxa 1108</i> on pages 54-56, DOI: <a href="http://zenodo.org/record/171476">10.5281/zenodo.171476</a&gt

    Robackia parallela Yan & Wang, 2006, sp. n.

    No full text
    Robackia parallela sp. n. (Figs. 1–4) Type material Holotype male, CHINA: Sichuan Province, Batang County, Zhubalong Town, 2500 m a.s.l., light trap, 11.vii. 2001, R. Zhang (BDN no. 20234). Etymology From Latin parallelus, referring to the parallel-sided superior volsella. Diagnostic characters The species is similar to R. pilicauda in the shape of the hypopygium, but can be separated by having a much lower AR, tergite IX with rounded posterior margin, a parallel-sided superior volsella, and abdomen with dark brown marks. Description Male imago (n = 1). Total length 3.33 mm. Wing length 1.85 mm. Total length / wing length 1.80. Wing length / length of profemur 2.61. Coloration. Thorax yellowish brown, with dark brown vittae, and mid preepisternum; median anepisternum dark brown; anterior 1 / 2 of postnotum blackish brown. Front legs dark brown; mid and hind legs yellowish brown with tarsi brown. Abdomen (Fig. 1) yellowish brown, tergites VII–IX with longitudinal dark bands, tergites VII–IX and hypopygium dark brown. Head. AR 1.30. Ultimate flagellomere 480 Μm long. Temporal setae 14, including 4 inner verticals, 5 outer verticals and 5 postorbitals. Clypeus with 13 setae. Tentorium 132 Μm long, 25 Μm wide. Palpomere lengths (in Μm): 30, 50, 128. 130. 175. Palp segment 5 / 3 1.37. Thorax. Antepronotals absent, acrostichals 7, dorsocentrals 8, prealars 4. Scutellum with 7 setae. Wing (Fig. 2). VR 1.19, R with 3 setae, R 1 bare, R 4 + 5 with 2 median and 2 apical setae. Brachiolum with 3 setae. Squama with 5 setae. Legs. Front tibia with 2 long subapical setae, 93 and 110 Μm long; spurs of mid tibia 25 and 27 Μm long, comb with 20 teeth, 10 Μm long; spurs of hind tibia 20 and 35 Μm long, comb with 40 teeth, 12 Μm long. Mid and hind legs without sensilla chaetica. Lengths (in Μm) and proportions of legs as in Table 1. Hypopygium (Figs. 3–4). Tergite IX with 4 strong dorsal setae at base of anal point and 6 setae on ventral projection. Anal point bearing 12 weak setae. Laterosternite IX with 1 seta. Anal point nearly parallel-sided with rounded apex, 65 Μm long, 20 Μm wide at base, 8 Μm wide in the middle, 10 Μm wide at apex. Anal tergite with rounded posterior margin, tergite bands V-shaped. Phallapodeme 77 Μm long. Transverse sternapodeme 65 Μm long. Superior volsella digitiform, slightly curved, with 1 apical and 1 subapical seta. Inferior volsella covered with microtrichia. Gonocoxite 90 Μm long, with 5 strong ventromesal setae. Gonostylus 180 Μm long, slightly bent, with 12 setae along mesal margin. HR 2.26, HV 3.33.Published as part of Yan, Chuncai & Wang, Xinhua, 2006, Robackia Saether from China (Diptera: Chironomidae), pp. 53-59 in Zootaxa 1361 on pages 54-55, DOI: 10.5281/zenodo.17468

    Robackia demeijerei Kruseman

    No full text
    <i>Robackia demeijerei</i> (Kruseman) <p> <i>Tendipes (Parachironomus) demeijerei</i> Kruseman, 1933: 195.</p> <p> <i>Cryptochironomus demeijerei</i> (Kruseman); Wang and Wang (1991: 43). <i>Robackia demeijerei</i> (Kruseman); Saether (1977: 123); Wang (2000: 646).</p> <p> The species was recorded from China as <i>Cryptochironomus demeijerei</i> (Kruseman) by Wang and Wang (1991) based on larvae from the Liaoning Province in Palaearctic China. The species was included as <i>Robackia demeijerei</i> (Kruseman) in the checklist of chironomids from China (Wang 2000). However, as the larvae material is not available the record could not be verified.</p> <p>The species has a Holarctic distribution.</p>Published as part of <i>Yan, Chuncai & Wang, Xinhua, 2006, Robackia Saether from China (Diptera: Chironomidae), pp. 53-59 in Zootaxa 1361</i> on page 57, DOI: <a href="http://zenodo.org/record/174685">10.5281/zenodo.174685</a&gt

    Paracladopelma binum Yan, Jin & Wang, 2008, sp. n.

    No full text
    Paracladopelma binum sp. n. (Figs 3–8) Type material: Holotype male (BDN no. 09273). CHINA: Shaanxi Province, Ankang City, Ningshan County, Xunyangba Town, 16.vii. 1994, light trap, W. Bu. Diagnostic characters. The species differs from other Paracladopelma species in having a bilobed inferior volsella, and anal tergite bands separated medially. Etymology. From Latin binus, two, referring to the inferior volsella with two lobes. Male (n = 1). Total length 3.50 mm. Wing length 1.75 mm. Total length / wing length 2.00. Wing length / length of profemur 2.16. Coloration. Thorax yellowish brown, with vittae slightly darker brown, mid preepisternum, median anepisternum, and anterior half of postnotum dark brown. Apex of femur and entire tibiae of foreleg dark brown, remainder yellowish green, tarsi broken; mid- and hind legs yellowish green, with distal 1 / 6 of femur, basal 1 / 6 of tibia, distal 1 / 3 of ta 3, and entire ta 4 and ta 5 dark brown. Abdomen pale yellowish, with tergite VIII and hypopygium brown. Head. AR 1.63. Ultimate flagellomere 650 Μm long. Frontal tubercles rounded, 8 Μm in diameter. Temporal 14 setae including 3 inner verticals, 9 outer verticals and 2 postorbitals. Clypeus with 9 setae. Tentorium 110 Μm long, 26 Μm wide. Palpomere lengths (in Μm): 32, 40, 113, 140, 215. Palpomere 5 / 3 1.90. Thorax. Antepronotals 6, dorsocentrals 8, acrostichals 9, prealars 3. Scutellum with 7 setae. Wing (Fig. 3). VR 1.23. Brachiolum with 2 setae, R with 12, R 1 with 2 at apex, R 4 + 5 with 20 setae. Squama with 1 seta. Legs. Froretibia with 2 subapical setae, 93 Μm and 106 Μm long; spurs of midtibia 20 Μm and 25 Μm long, comb with 22 teeth, 8 Μm long; spurs of hind tibia 23 Μm and 25 Μm long, comb with 38 teeth, 10 Μm long. Mid ta 1 with 3 sensilla chaetica, hind ta 1 with 1 sensilla chaetica. Lengths and proportions of legs as in Table 1. Hypopygium (Figs 4–8). Anal point narrowest medially, with rounded apex, 46 Μm long, 5 Μm wide medially, 10 Μm wide at apex. Tergite IX with 10 setae at base of anal point. Laterosternite IX with 2 setae. Anal tergite bands separated medially. Phallapodeme 63 Μm long. Transverse sternapodeme 37 Μm long. Superior volsella (Figs 6–7) weakly divided into dorsal and ventral lobes, with 13 setae, covered with microtrichia on both dorsal and ventral surfaces. Inferior volsella (Fig. 8) with two rounded, medially fused lobes, covered with microtrichia. Gonocoxite 88 Μm long, inner margin with 3 strong setae. Gonostylus 175 Μm long, widest medially, with weak longitudinal keel. HR 0.50, HV 2.00. Distribution. The species was collected in southern Shaanxi Province, China.Published as part of Yan, Chuncai, Jin, Zhaohui & Wang, Xinhua, 2008, Paracladopelma Harnisch from the Sino-Indian Region (Diptera: Chironomidae), pp. 1-29 in Zootaxa 1934 on pages 5-7, DOI: 10.5281/zenodo.18492
    • …
    corecore