The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

Lepidomeda copei
Lepidomeda copei
(Northern Leatherside Chub)
Native Transplant

Copyright Info
Lepidomeda copei (Jordan and Gilbert, 1881)

Common name: Northern Leatherside Chub

Synonyms and Other Names: Gila copei (Jordan and Gilbert 1881)

Taxonomy: available through www.itis.govITIS logo

Identification: Simpson and Wallace (1978); Sigler and Sigler (1987); Page and Burr (1991). Another commonly used name is Gila copei. Gilbert (1998) states that this species has been assigned to six different genera at various times.

Size: 15 cm.

Native Range: Upper Snake River system, Wyoming and Idaho, south to Sevier River system, southern Utah (Page and Burr 1991).

Native range data for this species provided in part by NatureServe NS logo
Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Nonindigenous Occurrences:

Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Lepidomeda copei are found here.

StateFirst ObservedLast ObservedTotal HUCs with observations†HUCs with observations†
AZ196719671Imperial Reservoir
ID197919792Middle Bear; Upper Snake-Rock
UT194819995Dirty Devil; Fremont; Lower Green-Diamond; Price; Strawberry
WY193419632Greys-Hoback; Gros Ventre

Table last updated 7/13/2024

† Populations may not be currently present.

Means of Introduction: Probably bait bucket introductions.

Status: Established in Utah; locally established in Wyoming. Presumably established in Idaho.

Impact of Introduction: The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The absence of data does not equate to lack of effects. It does, however, mean that research is required to evaluate effects before conclusions can be made.

Remarks: Although Simpson and Wallace (1978) listed this species as native to the upper South Fork of the Snake River in Idaho, we believe it is possible that it was introduced because of the fact that it was not collected from the upper Snake until the 1930s. In their list of fishes found in Idaho, Wydoski and Whitney (1979, Appendix 7) seemed to suggest that this species was introduced into the Snake River drainage and Bonneville basin in Idaho. However, Sigler and Sigler (1987) listed it as native to the eastern Bonneville basin which includes Idaho.

Other Resources:
FishBase Summary

Author: Leo Nico, and Pam Fuller

Revision Date: 6/26/2000

Peer Review Date: 6/26/2000

Citation Information:
Leo Nico, and Pam Fuller, 2024, Lepidomeda copei (Jordan and Gilbert, 1881): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=651, Revision Date: 6/26/2000, Peer Review Date: 6/26/2000, Access Date: 7/13/2024

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.


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. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [7/13/2024].

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