. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 278 CALIFORNIA I-MSII \\1» GAM] responsible for 1 lie widespread distribution of these two groups in western North America, including California. Smith (1966) and Koehn (1969) have reported that in western montane areas members of the subgenus Caiostomus occur sympatrically with species of the subgenus Pantosti us, and there are several records of breakdown of the reproduc- tive barriers (Hubbs et al. 1943). Catostomus microps and the
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 278 CALIFORNIA I-MSII \\1» GAM] responsible for 1 lie widespread distribution of these two groups in western North America, including California. Smith (1966) and Koehn (1969) have reported that in western montane areas members of the subgenus Caiostomus occur sympatrically with species of the subgenus Pantosti us, and there are several records of breakdown of the reproduc- tive barriers (Hubbs et al. 1943). Catostomus microps and the Sacramento sucker, Caiostomus occi- dentalis, occur allopatrically in the upper Pit Eiver system of Modoc County, California. Kutter (1908) recognized C. microps as a small- scaled relative of the more ubiquitous largescaled C. occidentalis. MATERIALS AND METHODS Specimens were collected from Rush Creek, Modoc County, Califor- nia. 6 miles east of Adin on Highway 299, T. 40 N., R, 9 E. This creek is the type locality for C. microps. Five extensive collections were made on Rush Creek on 4 April 1966, 8 October 1966, 26 December 1966, 12 March 1967, and 9 April 1967. '. T 42 N T 41 N T 40 N T 39 N R 7 E R 8 E R 9 E R 10 E 5 mi FIGURE 1. Map of study area, showing area of collections on Rush Creek, Modoc County. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original California. Dept. of Fish and Game; California. Fish and Game Commission; California. Division of Fish and Game. [San Francisco, etc. ] State of California, Resources Agency, Dept. of Fish and Game
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