Larva of the plumosus type, medium to large size (about 16 mm). Anterior pair of ventral tubules usually longer. Gular region only slightly darkened on posterior third, frontoclypeus pale or slightly darkened. Mentum with pointed teeth; centre tooth broad, possibly with a flanged edge, side teeth moderately seperated but tend to continue edge line of centre tooth.
Cytology: 4 pairs of relatively short chromosomes with the
thummi arm combination AB, CD, EF, G. Centromeres
markedly heterochromatic.
Arm G very short, bands indistinct and normally only paired at the
almost terminal
nucleolus. Nucleoli also in arms B, C, D (2 or multiple
nucleoli) and F.
Arm A1: 1a-e, 2d-3i, 12c-10a, 2c-1f, 9e-4a,
13a-19f(?) possibly as atrella A1
(could be
1-2c, 10-11? 9, 2d-3, 12, 8-4, 13-19)
Arm B1: 1-?, 20-18, ?, 9(?)-13, ?-8b, 17-14, 23-28
ie. derived from heteropilicornis
Arm E1: 1-3e, 5-10b, 4-3f, 10c-13
ie. as
aberratus
Arm F1: 1, 9-2, 13-19(?)
Click here to see the polytene chromosomes.
Found: Ontario - Bat Lake, Algonquin Park.
Amongst deep organic litter in a highly eutrophic lake.