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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.

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Common name: Northern Leatherside Chub

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

Taxonomy: available through www.itis.gov

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).

Alaska	Hawaii	Puerto Rico & Virgin Islands	Guam Saipan

Native range data for this species provided in part by NatureServe

Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

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:

Author: Leo Nico, and Pam Fuller

Peer Review Date: 6/26/2000

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.