Clypeal aperture about 4.5 times longer than wide. Gula dark to very dark on posterior third to half, frontoclypeus slightly to dark, some darkening elsewhere on dorsal head.
Mentum (fig. c) with pointed teeth; c1 tooth relatively broad with parallel sides, c2 teeth well developed and seperated (type III), 4th laterals reduced to about the level of 5th laterals (type II).
Ventromentum (fig. d) with smooth anterior margin; about 4 times wider than deep; 38-41 striae; Inter Plate Distance about 28-32% mentum width. Pecten epipharyngis (fig. a) with about 15-16 sharp teeth.
Premandible (fig. b) with relatively fine sharp teeth, about equal in length, the inner tooth about 1.75-3.5 times wider than outer tooth.
Mandible (fig. f) with third inner tooth fully developed and separated, and darkened (type IIIC); about 13-15 furrows on outer surface at base, pecten mandibularis with about 10 -11 bristles.
Antenna (fig. e) with relatively long basal segment, abt. 4.25 times longer than A2 and abt. 3.5 times longer than wide; Ring organ abt. a third to half way up from base; AR about 2.06; A3 shorter than A5; segment proportions (µm): 135 : 32 : 6 : 14 : 9.
Distance between antennal bases slightly larger than that between S4 setae.
Cytology: 4 moderately long polytene chromosomes with pseudothummi arm combination: AE, BF, CD, G.
Arm G short, with a terminal nucleolus and a large Balbiani ring near the other end. No nucleoli in the long chromosomes. No polymorphism known in the small sample of specimens.
Arm A1: 1a-e 9a-e 2d-3b 7d-4a 3i 13a-15e 3h-c 1f-k 8d-g 8a-c 2a-c 10a-12c 16a-19f
Arm C1: typical bands, groups 3 and 4, about the middle of the arm
Arm E1: 1 - 10b, 12b - 10c, 12c - 13
Arm F1: 1a - 6b, 19 - 18, 11f - 14h, 17 - 15, 11e - 6c, 20 - 23 i.e. as in calligraphus.
Found: Florida – Winter Haven, Polk Co.; Georgia – Camden subdivision, n. Athens, Clarke Co. (33.95°N; 83.37°W).
Louisiana – Many, Sabine Co. Tennessee – White Oak Creek, Knox Co.
Creeks and pools in the southeastern USA, but possibly up to Canada.
Sequences of arms A, E and F given in Wülker & Morath (1989) and photographs of chromosomes in Spies et al. (2002).
Shows affinities to C. anonymus (species 2o), C. calligraphus (species 2w) and to a group of South American species.
mtCOI: There is sequence of an apparently identical species in the BOLD database, but since it is "Private" the Bin no. cannot be determined, but may be the same specimen as in Genbank.