Iotichthys phlegethontis
Iotichthys phlegethontis
(Least Chub)
Native Transplant
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Iotichthys phlegethontis (Cope, 1874)

Common name: Least Chub

Taxonomy: available through www.itis.govITIS logo

Identification: Sigler and Miller (1963); Sigler and Sigler (1987; 1996); Page and Burr (1991).

Size: 6.4 cm.

Native Range: Streams near Salt Lake City and freshwater ponds and swamps around Great Salt Lake, Utah Lake, Beaver River, Parowan Creek, Clear Creek, and Provo River (Sigler and Miller 1963) in the Bonneville basin, northern Utah (Page and Burr 1991).

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Native range data for this species provided in part by NatureServe NS logo
Interactive maps: Point Distribution Maps

Nonindigenous Occurrences: This species was stocked in a pond west of Salt Lake City, Utah, in 1979, in a waterbody where it was not originally found (Baugh 1980; Sigler and Sigler 1987). Apparently it was stocked again, probably in other locations, in the late 1980s (Sigler and Sigler 1987, 1996).

Means of Introduction: Intentionally stocked for conservation purposes to create another population of a rare species.

Status: Status of stockings conducted in the late 1980s has not been evaluated (Sigler and Sigler 1996).

Impact of Introduction: Unknown.

Remarks: Voucher specimens: California (LACM 45699-1, The Least Chub is under review for listing as a federally endangered species (U.S. Fish and Wildlife Service 1997).45701-1).

Other Resources:
FishBase Summary

Author: Fuller, P.

Revision Date: 5/16/2000

Peer Review Date: 4/1/2016

Citation Information:
Fuller, P., 2018, Iotichthys phlegethontis (Cope, 1874): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL,, Revision Date: 5/16/2000, Peer Review Date: 4/1/2016, Access Date: 1/19/2018

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.

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Page Last Modified: Thursday, January 04, 2018


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2018]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [1/19/2018].

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