C. species (bathophilus type)

Fourth instar larva: Medium size bathophilus-type larva.  Ventral tubules of moderate length.  Head capsule with pale gula and frontoclypeus.
Mentum with 4th lateral slightly reduced, almost to the level of the 5th lateral (type I or II), c2 teeth partially separated from c1 (type IIA or worn III).
Ventromentum with about 36-37 striae, VMR about 0.26; distance between inner margins only about 0.25 of mentum width.  Pecten epipharyngis with about 17 relatively blunt teeth (type c).
Premandible with outer tooth slightly longer, inner tooth at least 2.5x wider.
Basal segment of antenna about 4.2 times longer than wide, Ring organ about 2/5 up from base of the segment; AR about 1.94; A2/A1 about 0.34; A4/A3 about 1.1; proportions of antennal segments (micron) 123 : 35 : 10 : 11 : 6 .
Mandible with third inner tooth slightly darkened and partially separated (type IIB), about 11-12 furrows on outer surface near base, about 11 setae in Pecten mandibularis.

Pupa:  A male pupal exuvia collected with the larvae, may belong to this species:
Abdominal tergites with dark shagreen on segments I-VI (appears largely towards edges), but much paler (only narrow bands) on more posterior segments.  Pedes spurii B large on segment II, small on segment III; pedes spurii A large on segment IV, just patches of spinules on segments V and VI.
Length 7.9 mm; Cephalic tubercles: 72 x 43 µm, subterminal seta about 38 µm.  About 85 hooks in the hook row at posterior of segment II.
Three spines on postero-lateral spur of segment VIII; about 69 taeniae on each side of anal lobe, in a double row at posterior end.

Cytology:  4 polytene chromosomes with the pseudothummi arm combination AE, CD, BF, G.
Arm G with a subterminal nucleolus.  Cytology of available specimens relatively poor.
spb A1:    Olive (groups 4-6) about 1/3 from centromere
spb B1:    Puff with proximal dark bands (groups 7-8) about a third from distal end
spb C1:    Groups 3-4 about the middle of the arm
spb D1:   
spb E1:   
spb F1:   
spb G1:    Relatively short, nucleolus virtually terminal, small Balbiani ring sometimes visible towards the other end.

Most distinctive features of the larvae are the high AR (over 1.9) and the short A4, hardly longer than A3.

Adult:  Not known.

Found in a pool along with C. 'queenslandicus'.

Found:            Queensland - North Stradbroke Island.

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Modified: 1 January 2019
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