Larva of fluviatilis-type, i.e. ventral tubules scimitar shaped with relatively pointed ends. Head capsule of normal width, with gula sometimes slightly darkened, frontoclypeus pale. Mentum of type II, with the fourth laterals about as high as the fifth laterals; central trifid tooth with the c2 teeth moderately separated (type I-III). AR about 2.1 - 2.3.
Cytology: 4 pairs of chromosomes with the thummi arm
combination: AB, CD, EF, G.
Arm G with a nucleolus at one end and a contriction near the
other. Distal of the constriction,
and also near the middle of the arm are two BRs.
Sometimes a puff is developed in
arm B. Polymorphic for arms A, B, C, D, E, and F.
moz A1: 1a-e, 10-12, 3if-, 15a-e, 3e-2d, 9e-a, 7-4,
8g-a, 14-13, 2c-1f, 16-19
moz A2: 1a-e, 8a-g, 4-7, 9a-e, 2d-3e,
15e-a, 3f-i, 12-10, 14-13, 2c-1f, 16-19
moz B1: Obvious dark bands at distal end.
moz B2+3: Differs from B1 by an included inversion, such
that dark bands are now proximal, but median section of arm is in
same order as in B1
moz C1: approx. 1-2c, 17a-16, 6b-5c, 8-11c, 15-13,
5b-2d, 7d-6c, 17b-22
moz C2: approx. 1-2c, 17a-16, abt.
14-15, 11c-8, 5c-6b, abt. 13f-a, 5b-2d, 7d-6c, 17b-22
moz D1: approx. 1-3, 11-12, 15-13d, 4(?)-8,13c-a(?),
16(?), 9-10, 17-24
moz D2: approx. 1-3. 11-12, 23a-17,
10-9, 16(?), 13a-c(?), 8-4(?), 13d-15, 23b-24
moz E1: 1 - 3e, 5 - 10b, 4 - 3f, 10c - 13;
i.e. as
aberratus
moz E2: 1 - 3e, 5 - 6, 12c - 10c, 3f
- 4, 10b - 7, 12d - 13
moz F1: 1a-i, 9-5d, 16-17, 10a-d, 13b-11, 13cd, 18-19b,
2-5c, 15-14, 19c-23
moz F2: 1a-i, 9-5d, 16-17, 10a-d, 13b-12, 19dc, 14-15, 5c-2, 19b-18, 13dc, 11a-i, 20-23
Found: Michigan - Lake Michigan.
Sequences for arms A, E and F given in Wülker, Devai and Devai (1989) as C. sp. Michigan A. Full description of the species by Wülker (2007) .