Larva a large plumosus-type. Gular region slightly darkened, with frontoclypeus darkened particularly in the centre.
Cytology: 4 pairs of chromosomes with the
Camptochironomus arm combination AB, DE, CF,
G.
Arm G with 3 Balbiani rings. Nucleoli in arms B and D,
as in Palearctic populations.
Polymorphism is arms A, B, C, D, and F; males particularly are
heterozygous for
arm F.
ten A1(pA1): 1a-g, 7a-3i, 7b-8e, 17f-13, 1h-2c, 9c-8f,
10-9d, 11-12c, 3h-2d, 17g-19
ten A2(pA2):
ten B1(pB1):
ten B2(nB1):
ten C1(pC2): 1-2d, 11d-14c, 19f-16, 7-6c, 8a-g, 6b-4,
14d-15, 9-11c, 3-2e, 20-22
ten C2(nC1): 1-2d, 4g-6b, 9-11c, 3-2e, 11d-14c, 19f-16,
7d-6c, 8a-g, 15-14d, 4a-f, 20-22
ten C3(1Lz):
ten D1(nD2):
ten D2(nD3):
ten E1(hE1): 1-2b, 7h-10b, 3e-2c, 07g-3f, 10c-13
ten F1(pF1): 1a-d, 9b-12, 3b-2f, 13-14c, 5d-6, 9a-7a,
14d-16, 5c-3c, 1e-2e, 17-23
ten F2(nF3): 1a-d, 9b-12, 3b-2,
13a-d, 1i-e, 3c-5c, 16-14d, 7-9a, 6-5d, 14c-a, 2a-e, 17-23
ten F3(1Rjk):
ten G1(hG1):
Found: Alaska - Potters Marsh, Anchorage.
There is some doubt that this species actually occurs in North America. However the data of Acton (1962) suggests that Alaskan populations should still be considered to be C. tentans.