C. tepperi Skuse

Larva a medium sized halophilus/bathophilus, variable;    Ventral tubules sometimes moderately developed (bathophilus), but sometimes only posterior pair present (halophilus) (see below).    Gular region pale, frontoclypeus not darkened.    Hind prolegs reduced quite suddenly near the tips (see below).    Mentum with 4th lateral reduced slightly, sometimes to about the level of the 5th lateral (type I-II), and c2 teeth notches on the c1 tooth (type I, sometimes tending towards type IV).    Ventromentum with about 26 - 32 striae.    Pecten epipharyngis with about 12-17 teeth.    Mandible with third inner tooth completely formed (type III), with about 12 - 16 striae.    Basal segment of antenna relatively long and narrow, about 3.7 - 5 times longer than wide; ring organ about one third from base of basal segment; AR about 2.3 - 2.5; antennal proportions 137 : 28 : 8 : 10 : 7 .

Terminal abdominal segments of C. tepperi
showing different degrees of development of the ventral tubules seen in various populations
Note also the relatively abrupt narrowing of the prolegs (best depicted in 'a').
From Martin, J., M.Sc. Thesis, The University of Melbourne, 1961.

Cytology:    4 pairs of chromosomes with the pseudothummi arm combination AE, BF, CD, G.    All chromosomes closely paired.
Arm G polymorphic for a subterminal nucleolus, with 2 Balbiani rings.    Nucleolus in arm F.    No inversion polymorphism known.    Irradiation experiments have revealed that the male sex determiner is located in the proximal region of arm A, between 3f and 19e (Martin, 1980).

tepA1:    1a-e, 11 - 10, 2c - 1f, 3e - 2d, 8 - 9, 3f-i, 12c-a, 4 - 7, 13 - 19                        as oppositusA4
tepB1:    Bulb and distal dark bands about 1/4 from end of arm.                            as oppositusB2
tepC1:    as 'pseudoppositus'C1
tepD1:    1-2f, 9b-e, 3d-a, 10d-12, 18g-a, 2g-i, 16-14h, 19c-a, 8-3e, 10a-c, 17a-f, 9a, 13-14g, 19d-24
tepE1:    1 - 3e, 10b - 3f, 10c - 13                            as oppositusE1, etc.
tepF1:    1 - 2a, 10 - 2b, 11 - 23                    as oppositusF1

Click here for the polytene chromosomes

Pupal exuvia pale, about 8.2 mm (6.75 - 9.27) long in females, (7.72 - 10.57) in males.    About 65 - 77 recurved hooks on segment 2; about 78 - 120 filaments along the edge of the swim fin.    Spur with about 6 spines (3 - 8), closely applied.

The salivary gland chromosomes were described by Martin (1974); the nucleoli and location of C-bands by Lentzios & Stocker (1979) and Lentzios et al. (1980).    Kalisch (1981); Kalisch & Hägele (1981, 1982) and Schmitz (1982) produced photographic maps of the polytene chromosomes based on surface-spread chromosomes.

See also C. tepperi adult;  C. oppositus larva.

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