Larva: a medium sized bathophilus-type. Gula and frontoclypeus pale in the single known specimen. Ventral head length (VHL) 263 micron, width of mentum about 0.7 times the VHL. AR 0.54; A1 4.1 times as long as wide, and about 0.46 of VHL. Mentum (Fig. a) very similar to that of other members of the C. oppositus group. The teeth are rounded but this may be due to wear; the 4th laterals are slightly reduced, almost to the level of the 5th laterals; the c2 teeth are relatively well separated, but the division between the c2 and c1 teeth do not reach down to the level of the outer sides of the c2 teeth. Ventromental plates (Fig. c) with about 28 - 30 teeth. Pecten epipharyngis difficult to see, but appears to have about 8 teeth. Antenna (Fig. b) relatively long, narrow basal segment; A1 4.1 times as long as wide, and about 0.46 of VHL; AR (Seg.1/segs.2-5) about 1.85. Premandible with the usual two teeth, inner tooth less than twice the width of the outer (about 1.8). Mandible (Fig. d) with third inner tooth pigmented and almost fully separated; 12 bristles in the pecten mandibularis and 16 striae near the base of the mandible.
Cytology: Three polytene chromosomes with the modified pseudothummi-cytocomplex combination: AEG, BF, CD. Arm G unpaired with a Balbiani ring (BR) near the fusion with arm E. A nucleolus is developed at about group 19 in arm F.
BB A1: 1a-e, 2d - 3e, 1f - 2c, 10a - 11e, 8 - 9, 15 - 13, 7 - 4, 12a-c, 3i-f, 16 - 19 as oppositus A5
BB B1: Large puff (group 7) is developed towards the distal end of the arm, with the dark bands (group 8) on the distal side.
as oppositus B2
BB C1: Banding pattern not clear.
BB D1: Banding pattern not clear
BB E1: 1 - 2d, 7g - 10b, 3e - 2e, 7f - 3f, 10c - 13 as oppositus E2
BB F1: 1 - 2a, 10 - 2b, 11 - 23 as oppositus F1
Click here for the polytene chromosomes
This species is known from only a single specimen from Bakers Beach, Tasmania (-41.1; 146.6), AT.57.1 5F, (Jon Martin & B.T.O. Lee) 9.xii.1979. The larval morphology and the banding patterns of the polytene chromosomes indicate a relationship to C. oppositus. The larval head capsule and the polytene chromosomes are mounted on separate slides.