Cryptochironomus digitatus Malloch

• Main Author: Saether, Ole A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2009
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Chironomidae; Cryptochironomus; Cryptochironomus digitatus; Beaver Creek
• Online Access: https://doi.org/10.5281/zenodo.6220726; http://treatment.plazi.org/id/03AA946EFFFFE06413D0FB96FB4AFB2A

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, 9males, 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 LR1 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 (1977b 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. Caudal ...