In BOLD Bin no. BOLD3004.
i.e. the same as C. staegeri and C. 'tigris'
Adult:
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Female - General coloration as male but with dark markings more extensive.
Wing length 6.08 mm; VR 0.95 (Sublette & Sublette give it as 1.05); squama fully fringed.
Antennal proportions 25 : 17 : 20 : 20 : 35. AR 0.43, A5/A1 - 1.4.
Length frontal tubercles 74 µm. Clypeus broad, 2.2 times width of antennal pedicel. Palpal proportions (segs. 2-5): 5 : 16 : 15 : 22.
Thoracic setae: Acrostichal in one staggered row; dorsocentral (incl. humerals) - 70; prealar - abt 9; supra-alar - 2; Scutellar - anteriorly abt. 60 in strewn pattern, posterior row about 40.
Leg proportions:
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Pupa: Length 9.19-14.0 mm (Female: about 12.9-14.0 mm, Male: about 9.2-13.3 mm).
Cephalothorax brown, abdomen pale yellowish with brown markings.
Fourth instar larva a large plumosus-type (length: female - about 18.5-22.8 mm; male - about 17.3-20 mm), ventral tubules long, usually anterior pair longer (Female: Ant. 2.52 mm (2.20-3.00), Post. 2.15 mm (1.68-2.48); Male: Ant. 2.31 mm (1.84-2.64), Post. 1.98 mm (1.64-2.32)).
Posterolateral tubules about 300-400 µm long. Anal tubules short and relatively cone shaped, less than 1.5 times longer than wide.
Dark to very dark gular region, pale frontoclypeus. Ventral head length (VHL) about 290 micron (330-430).
Mentum with pointed teeth; c1 tooth with parallel sides, c2 teeth well developed (type IIA); 4th laterals slightly reduced (type I-II).
Ventromental plates separated by 0.32-0.37 of mentum width, with anterior margin finely crennulated; about 59-88 striae.
Pecten epipharyngis with about 11-19 teeth, larger near the center, diminishing in size laterally. Premandible with teeth about equal in length, inner tooth about 2.1-2.9 times wider than the outer tooth.
Antenna with basal segment 2.7-4.3 times longer than wide. At least in the Klamath Lake, Oregon population this character appears to be dimorphic, with some less than 3 times longer than wide (unlesss an artefact of slide mounting), others around 4 times longer than wide (4.0–4.3); AR about 2.14-2.49; antennal proportions 148 : 38 : 8 : 12: 7; A3 shorter than A4, and usually slightly longer than A5.
Distance between antennal bases greater than the distance between S4 setae.
Mandible, with small heel; third tooth relatively distinct, but pale (type IIA), about 26-27 furrows on the outer surface at the base.
Identification: The larva of this species can be recognized by the combination of characters: large plumosus-type, dark gula and pale frontoclypeus, about 60-90 striae on ventromentum, which has a crenullated anterior margin. This does not separate it from C. crassicaudatus or C. staegeri.
Cytology: 4 polytene chromosomes with the thummi arm combination AB, CD, EF, G.
Arm G closely paired with a virtually terminal nucleolus and a central Balbiani ring (BR); chromosome narrows from BR to nucleolus. Nucleolus also in arm B, just distal to the 4 characteristic bands.
Inversion polymorphism in arms C and D.
froA1: 1a-e, 7 - 5e, 3 - 2d, 9 - 8, 13 - 17d, 1f - 2c, 10 - 12?, 4 - 5d, 17e - 19.
froB1: Puff with proximal dark bands (groups 7 and 8) at distal end of arm; nucleolus about group 21.
froC1: not clarified; typical group 3-4 about middle of arm.
froC2: not clarified.
froD1: not clarified.
froD1: not clarified.
froE1:1 - 3a, 10b - 3f, 10c - 13 i.e. as aprilinus, etc.
froF1: 1 - 6a, 6d - 9, 6b-c, 17 - 10, 18 - 23 by transp. 6bc from obtusidens.
froF2: 1 - 5, 17, 6c-b, 9 - 6d, 6a, 16 - 10, 18 - 23.
froG1: virtually terminal nucleolus and median BR.
Molecular sequences:
mtCOI: There are two sequences in GenBank (copied in BOLD Database), Accession nos KF278235 and KF278237.
This species clusters with C. staegeri in BOLD BIN:AAI4303
Found: Quebec - Trois-Rivières.
California - Antioch, Contra Costa Co.: 4 ml e. Olive, Los Angeles Co.; O'Neil Forebay and San Luis Reservoir, Merced Co.;
Lake Crowley, Bishop, Mono Co., Greenfield, Monterey Co.; 1 ml s. Napa, Napa Co.; Lake Elsinore, Riverside Co. (Type locality);
Lake Merced, San Francisco Co.; San Mateo Co.; Lake Dalwigk, Vallejo, Solano Co.
Oregon - Upper Klamath Lake, 1 ml n. Williamson River (42.47°N, 121.57°W); Smith Loop Road, 7 ml. s. Corvallis
(44.50°N, 123.25°W).
The morphology and cytology have been described by Wülker et al. (1971).
Sublette & Sublette originally designated the species authors as Atchley and Martin, 1971, but Spies (2000) designated a lectotype and corrected the author designation.