Species 2b . C. decorus group

Adult male

Male terminalia of C. sp. 2b (left)
with superior appendage (right)

Pupa: Pupal spur with only about one spine.

Pupal spur of C. sp. 2b

Larva a small to medium (abt 12 mm) semibathophilus-type (i.e. lateral projections only slightly developed);    ventral tubules about 1.8 mm long, posterior pair usually longer.    Dark gular region, frontoclypeus pale.    Mentum with generally rounded teeth; centre tooth fairly broad with side teeth only moderately developed - little more than shoulders (type I); fourth laterals slightly reduced (type II); 2nd, 3rd and 5th laterals about in line, 1st laterals higher.

Cytology:    4 pairs of chromosomes with the thummi arm combination AB, CD, EF, G.
Arm G partly paired and apparently submetacentric, with a heterochromatic centromere about one third along the arm; nucleolus almost terminal on short arm, Balbiani ring about one third from end of long arm.    No nucleolus on any other arm.    Polymorphism in arms A and F, and perhaps also G.

Found: New Brunswick - Kouchebouguac National Park.
              Ontario - Sudbury.

            Pools and creeks.

See also    C. bifurcatus,    C. sp. b,    C. sp. c,    C. sp. j,    C. sp. z,    C. sp. 2a,    C. decorus gp. sp. 2,    C. sp. 2t,    C. decorus Joh.,    C. sp. 3h,    C. sp. 3i,    C. sp. 3j,    C. sp. 3r,    C. harpi,    C. blaylocki,    C. decorus R & F.,    C. mozleyi,    C. winneli.

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