Species 2f. C. whitseli Sublette & Sublette, 1974

Adult

Male:
Wing length 2.62 - 3.77 mm; width about 0.89 mm; VR about 1.05.
AR 2.75 - 3.41; frontal tubercles present about 23 µm; 18 - 38 clypeal setae; palpal proportions 5 : 30 : 32 : 43.
LR ant. 1.42 - 1.67; mid 0.58 - 0.62; hind 0.70 - 0.76.
Leg proportions:
 
Fe
Ti
Ta1
Ta2
Ta3
PI
890
830
1190
650
480
PII
950
870
550
320
250
PIII
1070
1130
820
400
350
 
Ta4
Ta5
LR
F/T
Ta5/Ti
PI
390
170
1.42-1.67
1.07
0.20
PII
180
100
0.58-0.62
1.09

PIII
210
120
0.70-0.76
0.95

Abdominal segments with broad basal fasciae which extend all the way to the base of most terga.


From Sublette & Sublette 1974

Setae of the inferior volsella with small branches.

Female:






 Wing length 3.77 mm; VR - 1.06. LR - 1.53-1.67.

 Head - frontal tubercles about 410 µm.
 Antennal proportions: 13 : 15 : 13 : 22.
 Palpal proportions (segs 2-5): 7 : 25 : 33 : 49.  Clypeus with 30 setae.

 Thorax - Mesonotum with conspicuous median tubercle.
 Setae: Acrostichals in staggered row; Dorsocentrals - 33; Prealar - 6,
 Supra-alar - 1; Scutellar anteriorly with 14 smaller setae in random pattern,
 posterior transverse row of about 16 setae.


 
Fe
Ti
Ta1
Ta2
Ta3
PI
900
780
1300
620
500
PII
930
850
530
300
200
PIII
1000
1070
800
470
330
 
Ta4
Ta5
LR
F/T
Ta5/Ti
PI
420
200
1.53-1.67
1.15
0.26
PII
150
100
0.58-0.62
1.09
 
PIII
200
120
0.75
0.93
 

Pupa  Cephalothorax blackish; abdomen infuscate with marginal markings and swim fin blackish.
       Total length 6.13-8.44 mm (males); 65-74 recurved hooks on second tergum.
       Caudolateral spurs on segment VIII highly variable with from 1-6 spines, usually more than two.  Swim fin with 57-85 flattened setae.

Larva a small to medium (female 10.2 - 14.2 mm) thummi or plumosus-type (i.e. some with lateral projections up to about 0.05 mm long); posterior pair of ventral tubules usually longer.  Gular region and frontocylpeus pale.  Ventral head length 290 - 370 µm.
Mentum with pointed teeth; centre tooth tall and relatively narrow, side teeth well separated (type III); 4th laterals slightly reduced (type II).
Ventromentum with smooth outer margin.  Pecten epipharyngis with 11 - 17 teeth.
Antenna with basal segment about 3.3 times longer than wide and about 3.3 times longer than segment 2; Ring organ about 1/3 to 1/2 way up from base; AR about 1.7.
Mandible with 3rd inner tooth well developed and darkened (type IIIC).

Cytology:  4 polytene chromosomes with the maturus arm combination AF, BE, CD, G.
Arm G normally paired except in the area of the subterminal nucleolus;  two Balbiani rings whose position varies due to inversion polymorphism.  No nucleoli in the long chromosomes.
Inversion polymorphism in arms B, C, D and G.
whiA1:    1a-e, 2d-3, 12-10, 2c-1f, 9-4, 15-13, 16-19;                i.e. as maturus A2
whiB1:    Puff with distal dark bands near the end of arm, but further from end than in maturus.
whiC1:    1-6b, 11c-8, 15-11d, 17a-16, 7-6c, 17b-22            ie. as aberratus, pilicornis, tenuistylus, etc.
whiC2:    1-2b, 11bc, 6b-2c, 11a-8, 15-11d, 17a-16, 7-6c, 17b-22
whiD1:    1-3g, 11-18d, 7-4, 10-8, 18g-24
whiE1:    1-3e, 10b-3f, 10c-13:                                            i.e. as frommeri, halophilus, etc.
whiF1:    1-2, 15e-12d, 8-3, 9-12c, 15f-23

Molecular Data: Sequence for COI, CytB, and 18S given in Martin et al. (2007) (lodged in GenBank).  Other COI sequences available in BOLD database.

Found: British Columbia - Abbotsford; Burnaby; Gulf Islands National Park Reserve; 10 Km w. Kamloops (all from BOLD)
            California - horse trough, Santa Clara Co. (type locality); Berkeley, Alameda Co.; Kennsington, 2 ml. n. Lafayette, 1 ml s. Martinez, and
            Wildcat Creek, El Cerrito, all Contra Costa Co.; Pico Rivera, Los Angeles Co., 12 ml ne. El Portal, Mariposa Co.;
            6274 Western, Arlington, Experimental Ponds UCR, and 448 N. Orange St., both Riverside, all Riverside Co.;
            Truckee River nr. Tahoe City (39.172°N, 120.138°W), Placer Co.; 5 ml n. Vacaville (38.37°N, 121.98°W), Solano Co.

            Pools and shallow flowing parts of creeks and rivers.    The sample from near Vacaville was in sulphurous water.

Morphology described by Sublette and Sublette (1974), cytology by Wülker and Martin (1974), pattern of arm C1 in Wülker (1991) and of arm D1 in Kiknadze et al. (2004).

[ See also C. maturus| Return to Index| Go to References ]

Modified: 25 October 2018
Access: Unrestricted
Copyright © 2000-2018, Jon Martin.