Larva: Large bathophilus-type larva. Head capsule heavily darkened on the gula, frontoclypeus and other regions. Mentum with generally sharp teeth; 4th laterals reduced to about level of 5th laterals (type II); c2 teeth reasonably well separated (type II), pointed, c1 tooth relatively broad with straight sides. Ventromentum with about 39-44 striae. AR 2.11 - 2.27; basal segment 3.3 - 3.7 times longer than wide; ring organ from 0.3 to 0.4 up from base of segment; antennal proportions (µm): 165 : 37 : 9 : 15 : 7 . Premandible with inner tooth about 2.3 - 3.6 times the width of the outer tooth. Mandible with 3rd inner tooth pigmented and relatively well separated; about 12 - 16 striae near base. Dorsal and ventral anal tubules rather different in shape, one pair longer and more rounded at tip (605 x 265 µm), the other pair shorter and more pointed (430-505 x 230-250 µm).
Cytology: 3 pairs of chromosomes with the modified pseudothummi arm combination AEG, BF, CD. Arm G with a subterminal nucleolus followed by a large Balbiani ring, separated by about 12 bands; a further BRis involved in a polymorphic inversion. Polymorphism in arms B, D and G-E.
occA1: 1a-e, 4c-a, 12a-c, 3i-f, 9 - 8a, 2d - 3b, 6c - 4d, 11 - 10a, 2c - 1f, 3e-c, 6d - 7, 13a - 19
occD1: 1 - 2c, 17c-a, 10c - 7c, 2f-h, 16 - 10d, 3 - 7b, 2ed, 17d - 24
occE1: unspecified changes from that of duplex
occF1: 1 - 2a, 10 - 2b, 11 - 23 as oppositusF1
Nucleoli and location of C-bands studied by Lentzios & Stocker (1979) and Lentzios et al. (1980).
Morphologically very similar to C. australis and C. duplex, but is allopatrically distributed on the west of the continent.