Larval mouthparts of C. utahensis.
a. Pecten epipharyngis; b. Premandible note longer outer tooth;
c. Antenna - note long, narrow basal segment;
d. Mentum - note c2 teeth relatively well separated from c1 (type III), 4th laterals reduced (type II);
e. Ventromentum - VMR abt 0.3; f. Mandible - note 3rd inner tooth separated and partly darkened.