Chironomus (Chironomus) entis Shobanov

Chironomus ( Chironomus ) entis Shobanov (Figs 3 A–C, 6 A–E, 7, 9) Chironomus ( Chironomus ) entis Shobanov, 1989 a, 1989 b: 341. Chironomus plumosus f. semireductus auct. pro parte Chironomus muratensis Chang et al . 1993, 1994, not Ryser, Sholl et Wülker. Material examined. Lake Winnipeg light tra...

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Main Author: Saether, Ole A.
Format: Text
Language:unknown
Published: Zenodo 2012
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Online Access:https://dx.doi.org/10.5281/zenodo.6169899
https://zenodo.org/record/6169899
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Summary:Chironomus ( Chironomus ) entis Shobanov (Figs 3 A–C, 6 A–E, 7, 9) Chironomus ( Chironomus ) entis Shobanov, 1989 a, 1989 b: 341. Chironomus plumosus f. semireductus auct. pro parte Chironomus muratensis Chang et al . 1993, 1994, not Ryser, Sholl et Wülker. Material examined. Lake Winnipeg light traps: Matheson Island Government Wharf, 5 males, 3 females, 5.vi. & 26.vii. 1969; 4 km off Grand Rapids, 22 males, 8.vi. 1969; Victoria Beach, 110 males, 9.vii. & 25.vii. 1969; Pine Dock, 9 males, 10.vii. 1969; 0.5 km off George Island, 131 males, 11.vii. & 12.vii. 1969; 3 km off Grand Rapids, 1755 males, 13.vii. & 4.ix. 1969; 10 km off (Sturgeonskin point) Long Point, 4471 males, 14.vii. 1969; 3 km off McCreary Island, 344 males, 15.vii. 1969; Gull Harbour, 28 males, 5 females, 16.vii. 1969; Gimli Government Wharf, 197 males, 24.vii. 1969; 3 km off George Island, 1578 males, 1 female, 27.vii. 1969; Grand Rapids Government Wharf, 728 males, 28.vii. & 5.ix. 1969; 5 km off Selkirk (Horse) Island, 487 males, 29.vii. 1969; McBeth Harbour, 202 males, 30.vii. & 7.ix. 1969; Pine Dock, 5 males, 31.vii. 1969; 15 km E off Long Point, 6 males, 6.ix. 1969; Beaver Point, 413 males, 18.vi. – 27.viii. 1971; 20 Mile Creek, 2 males, 5.viii. 1971; Old Fishing Dock, 839 males, 9.vi. – 5.viii. 1971; Calder's Dock, 373 males, 11.vi. – 8.ix. 1971; Hecla Island, 12 males, 27.vii. & 11.viii. 1971. Emergence traps: Beaver Creek, 6 males, 22.vii. – 11.viii. 1971. Rearing specimens: NNE of Reindeer Island, 4 males, 11.vi. 1969; NW Disbrowe Point, 1 male, 11.vii. 1969; Saskatchewan River Buoy, 1 male, 13.vii. 1969; East of Selkirk Island, 1 male, 29.vii. 1969; West of Selkirk Island, 3 males, 29.vii. 1969; East McCreary Island, 3 males, 31.vii. 1969; Anama Bay, 1 male, 31.vii. 1969; 13 km SE Bigstone Point, 1 male, 1 female, 3.ix. 1969. South Basin, 55 larvae, 9.vii. – 31.x. 1969; Narrows, 302 larvae, 1 pupa, 4.vi. – 31.x. 1969; North Basin, 356 larvae, 8 pupae, 4.vi. – 31.x. 1969. Normal unparasitized males from Lake Winnipeg have an AR of 4.80–6.61, 5.46 (115); 30 –55, 36 (10) sensilla chaetica on p 2; 20 –36, 24 (10) sensilla chaetica on p 3; and fall completely within the redescription of C. plumosus (L.) by Strenzke (1959: 19). The females have 130–220, 178 (10) sensilla chaetica on p 2; 140–252, 217 (10) sensilla chaetica on p 3. Genitalia of normal male and female, gynandromorphs and intersexes are illustrated in Saether & Galloway (1980 figs. 5–6). The female genitalia are also illustrated in Saether (1977 fig. 81 D–E). The immatures (Figs 3 A–C, 6 A–E) are also typical C. plumosus except that the larva has blood-gills of semireductus type (Lenz 1954 – 62: 161; Shobanov 1989). Although the blood-gills overlap in length between C. entis and C. plumosus the head capsule measurements show that only one is species involved. The head capsule lengths of different instars is shown in Fig. 9. Distribution and ecology. C . entis in North America (as C . f. semireductus) is known from British Columbia and Manitoba, and from Washington, Colorado, North and South Dakota, Minnesota, Wisconsin and Indiana (Saether 1970: 8, 1975: 3130; Saether & McLean 1972: 11; Wiederholm 1976: 27; Kiknadze et al. 2000: 859; Martin 2012). In the Palaearctic region C. entis is known from freshwater in Norway, Finland, Estonia, Chech Republic, Russia and Switzerland (Kiknadze et al. 2000: 859, Saether & Spies 2011). In Lake Winnipeg C. entis is the most common Chironomus species in the benthos of the narrows and the north basin (Figs 1, 7). Although many adult specimens were caught in the light traps from 1971 (Fig. 5) even more were caught on the light traps set on the ship in 1969. There apparently are two generations a year. : Published as part of Saether, Ole A., 2012, The Chironomus group (Diptera: Chironomidae) in Lake Winnipeg, Canada, pp. 1-19 in Zootaxa 3275 on pages 9-10, DOI: 10.5281/zenodo.280836 : {"references": ["Shobanov, N. A. (1989 a) Morphological differentiation of Chironomus species from plumosus group (Diptera, Chironomidae). Trudy, Institut Biologii Vnutrennikh Vod Akademii Nauk SSSR (in Russian), 56 (59), 250 - 279.", "Shobanov, N. A. (1989 b) The morphological differentiation of Chironomus species of plumosus group (Diptera, Chironomidae). Larvae. Acta Biologica Debrecina, Supplementum Oecologica Hungarica, 2, 335 - 344.", "Chang, P. S. S., Cobb, D. G., Flannagan, J. F. & Saether, O. A. (1993) The aquatic insects from the 1969 Lake Winnipeg baseline survey. Canadian Data Report of Fisheries and Aquatic Sciences, 897, 77 pp.", "Chang, P. S. S., Cobb, D. G., Flannagan, J. F. & Saether, O. A. (1994) Light trap collections of mayflies, caddis flies and chironomids from Lake Winnipeg during 1969 and 1971. Canadian Data Report of Fisheries and Aquatic Sciences, 2223, 27 pp.", "Strenzke, K. (1959) Revision der Gattung Chironomus Meig. I. Die Imagines von 15 norddeutschen Arten und Unterarten. Archiv fur Hydrobiologie, 56, 1 - 42.", "Saether, O. A. & Galloway, T. D. (1980) Sexual anomalies in Chironomini (Chironomidae: Diptera) from Lake Winnipeg, Manitoba. With observations on mermithid (Nematoda) parasites. Acta Universitas Carolinae, 1978, 193 - 211.", "Saether, O. A. (1977) Female genitalia in Chironomidae and other Nematocera: morphology, phylogenies, keys. Bulletin of the Fisheries Research Board of Canada, 197, 1 - 209.", "Lenz, F. (1954 - 1962) Tendipedidae (Chironomidae). b) Subfamilie Tendipedinae (Chironomidae). B. Die Metamorphose der Tendipedinae. In: Lindner, E. (ed.): Die Fliegen der palaearktischen Region, 13 c, 139 - 260.", "Saether, O. A. (1970) A survey of the bottom fauna in lakes of the Okanagan Valley, British Columbia. Technical Report of the Fisheries Research Board of Canada, 196, 1 - 41.", "Saether, O. A. & McLean, M. P. (1972) A survey of the bottom fauna in Wood, Kalamalka and Skaha Lakes in the Okanagan Valley, British Columbia. Technical Report of the Fisheries Research Board of Canada, 342, 1 - 20.", "Wiederholm, T. (1976). A survey of the bottom fauna of Lake Sammamish. Northwest Science, 50, 23 - 28.", "Kiknadze, I. I., Butler, M. G., Golygina, V. V., Martin, J., Wulker, W. F., Sublette J. E. & Sublette, M. F. (2000) Intercontinental karyotypic differentiation of Chironomus entis Shobanov, a Holarctic member of the C. plumosus group (Diptera, Chironomidae). Genome, 43, 857 - 873.", "Martin, J. (2012) North American cytospecies of the genus Chironomus (includes Chaetolabis, Lobochironomus and some Einfeldia (s. l. )). http: // www. genetics. unimelb. edu. au / martin / NACytfiles / NAChiron. html. Accessed 11 March 2012.", "Saether, O. A. & Spies, M. (2011) Fauna Europaea: Chironomidae. Fauna Europaea version 2.4. Available from: htpp: // www. faunaeur. org. (accessed 27 January 2011)."]}