Cryptochironomus
- Dataset
- Cryptochironomus Kieffer from Lake Winnipeg, Canada, with a review of Nearctic species (Diptera: Chironomidae)
- Rank
- GENUS
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Insecta
- order
- Diptera
- family
- Chironomidae
- genus
- Cryptochironomus
description
Thorax. Dorsocentrals 13 – 19, 15; prealars 5 – 8, 7. Scutellum with 16 – 36, 27 setae. Wing. R 4 + 5 with 12 – 17, 14 setae. Squama with 10 – 18, 15 setae. Legs. LR 1 – 3: 1.31 – 1.47, 1.40; 0.52 – 0.56, 0.54; 0.63 – 0.67, 0.65. Hypopygium. Gonocoxite 176 – 200, 190 µm; gonostylus 176 – 186, 182 µm.
materials_examined
Material examined. CANADA: Manitoba, Lake Winnipeg records: 3 km off McCreary Island, 1 male, 15. vii. 1969; Gimli Government Wharf, 24. vii. 1969; Beaver Point, 9 males, 7. vii. – 6. viii. 1971; Beaver Creek, 2 males, 22 – 29. vii. 1971. Six males from Lake Winnipeg have a lower AR and LR, and are smaller than the other C. ramus. They may represent another species or be merely a variety or form of C. ramus. On an average, their size is 22 % smaller than that found in males of C. ramus. Some measurements are (n = 6): Total length 5.27 – 6.29, 5.72 mm. Wing length 2.37 – 2.80, 2.53 mm. Total length / Wing length 2.22 – 2.48, 2.32. Head. AR 2.52 – 2.80, 2.68. Temporals 24 – 32, 28. Clypeus with 11 – 20, 17 setae. Tentorium 153 – 173 long.