Cottus gulosus gulosus ( Girard 1854 )

Moyle, Peter B. & Campbell, Matthew A., 2022, Cryptic Species of Freshwater Sculpin (Cottidae: Cottus) in California, USA, Zootaxa 5154 (5), pp. 501-527 : 517

Cottus gulosus gulosus ( Girard 1854) , San Joaquin Riffle Sculpin, nominate subspecies

Description is the same as for the C. gulosus ( Fig. 1 )

Holotype: USNM 291 . Same as for C. gulosus , above.

Paratype: None designated

Diagnosis: Distinguished from other members of the C. gulosus complex as a distinct lineage as determined by genomic studies ( Baumsteiger et al. 2014, this study) and by its limited geographic distribution ( Fig. 3 ). See species description for distinguishing it from co-occurring C. asper .

Distribution. These California endemic sculpins are found in cold-water riffles, in headwaters or below dams with cold water releases into rivers in the southern Sierra Nevada on the eastern side of the Central Valley, except for the American River (which flows directly into the Sacramento River), the rivers that contain now-isolated populations all flow into the southern Central Valley, especially the San Joaquin River. Rivers with populations include the Mokelumne, Stanislaus, Tuolumne, Merced, Fresno, San Joaquin, Kings, and Kern rivers.

Etymology. See C. gulosus

Figures

FIGURE 1. Inland (A, B) and Coastal (C, D) Riffle Sculpins from the UC Davis Museum of Wildlife and Fish Biology. (A) San Joaquin Riffle Sculpin, Cottus gulosus gulosus. WFB-277-08-09. Kaweah River, Tulare County, California (68 mm SL, 82 mm TL). Coll. Larry Brown, September 10, 1985. Holotype is same as for C. gulosus (USNM 291). (B) Sacramento Riffle Sculpin, Cottus gulosus wintu. Holotype WFB-3464. North Fork Feather River, Butte County, California (78 mm SL, 96 mm TL). Coll. Jason Baumsteiger, October 5, 2017. (C) Coastal Riffle Sculpin, Cottus ohlone. Holotype. WFB-3402.Also, holotype for Ohlone Sculpin, C. o. ohlone. Guadalupe River, Santa Clara County, California (65 mm SL, 79 mm TL). Coll: J. J. Smith, November 18, 1986. (D) Pomo Riffle Sculpin, Cottus ohlone pomo. Holotype. WFB-3396. Pieta Creek near mouth on Russian River, Mendocino County, California (90 mm SL, 105 mm TL). Coll. P Moyle, J. Baumsteiger, August 2, 2017.

FIGURE 3. (A) Distribution of Cottus pitensis in northeastern California (light green). This distribution is mostly in streams of the Pit River basin in California but extends into Oregon tributaries of Goose Lake (upper right corner of map). (B) Drawing of C. pitensis holotype from Bailey and Bond (1963), collected from the North Fork Pit River, Modoc County, CA.