Cryptochironomus digitatus Malloch

Cryptochironomus digitatus (Malloch) (Fig. 3 C–G) Material examined. CANADA: British Columbia, Marion Lake, pupal exuviae, 1964, A.L. Hamilton. Lake Winnipeg records: Victoria Beach, 219 males, 9. & 25.vii. 1969; Pine Dock, 6 males, 10. & 31.vii. 1969; 0.5 km off George Island, 10 males, 11....

Full description

Bibliographic Details
Main Author: Saether, Ole A.
Format: Other/Unknown Material
Language:unknown
Published: 2009
Subjects:
Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Cryptochironomus
Cryptochironomus digitatus
Canada
British Columbia
Seta
Matheson
Hamilton Lake
Matheson Island
Long Point
Beaver Creek
Online Access:https://zenodo.org/record/6220726
https://doi.org/10.5281/zenodo.6220726
Description
Summary:Cryptochironomus digitatus (Malloch) (Fig. 3 C–G) Material examined. CANADA: British Columbia, Marion Lake, pupal exuviae, 1964, A.L. Hamilton. Lake Winnipeg records: Victoria Beach, 219 males, 9. & 25.vii. 1969; Pine Dock, 6 males, 10. & 31.vii. 1969; 0.5 km off George Island, 10 males, 11.vii. 1969; 3 km off Grand Rapids, 28 males, 13.vii & 4. x. 1969; 10 km off (Sturgeonskin) Long Point, 22 males, 14.vii. 1969; 3 km off McCreary Island, 14 males, 15.vii. 1969; Gull Harbour, 5 males, 1 female, 16.vii. 1969; Gimli Government Wharf, 3 males, 24.vii. 1969; Matheson Island Government Wharf, 1 male, 26.vii. 1969; 3 km off George Island, 46 males 27.vii. 1969; Grand Rapids Government Wharf, 16 males, 28.vii. 1969; 5 km of Selkirk (Horse) Island, 58 males, 29.vii. 1969; McBeth Harbour, 123 males, 7.ix. 1969; 15 km east of Long Point, 1 male, 6.ix. 1969; 20 Mile Creek, 1 male, 1.ix. 1971; Old Fishing Dock, 9 males, 21.vii. 1971; Calder’s Dock, 22 males, 6. & 14. vi. 1971; Hecla Island, 10 males, 27. vii. & 11.viii. 1971; Beaver Creek, 1 male, 13.vii. 1971; South Basin, 31 larvae, 4.vi.– 31.x. 1969; Narrows, 9 larvae, 4. vi.– 31.x. 1969; North Basin, 41 larvae, 1 pupa, 4.vi.– 31.x. 1969. The Lake Winnipeg males have an AR of 3.54–4.03, 3.80 (10); a LR 1 of 1.23–1.39, 1.30 (10); 9 –24, 14(10) sensilla chaeticae on mid leg, none on hind leg; and 24 –40, 32(10) setae on squama. A female has 75 sensilla chaeticae on mid leg, 34 on hind leg. Its genitalia are illustrated in Saether (1977 b fig. 90 A, B). Pupa (n= 1–2, tentatively associated and not reared) Total length 10.34–10.84 mm. Cephalothorax. Cephalic tubercle (Fig. 3 C) 270–285 µm long, 46 µm wide 1 / 3 from base, 40 µm wide 2 / 3 from base, with or without a 20 µm long frontal seta. Abdomen. T I–V, anterior portion of T VI, S I–V and margins of S VI–VIII with reticulation. Caudal margin of T II with 31–43 hooklets on each side of 90–1601,wide interruption. Pedes spurii A present on S IV–VII, spinules 36–40 µm long on IV, 14–18 µm long on V–VII. ...

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