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.

Moapa coriacea
Moapa coriacea
(Moapa Dace)
Native Transplant

Copyright Info
Moapa coriacea Hubbs and Miller, 1948

Common name: Moapa Dace

Taxonomy: available through www.itis.govITIS logo

Identification: La Rivers (1962); Page and Burr (1991).

Size: 9 cm.

Native Range: Endemic to headwaters of Moapa (Muddy) River, Clark County, Nevada (U.S. Fish and Wildlife Service 1983a; 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 Moapa coriacea are found here.

StateFirst ObservedLast ObservedTotal HUCs with observations†HUCs with observations†
NV197219802Hot Creek-Railroad Valleys; Spring-Steptoe Valleys

Table last updated 6/21/2024

† Populations may not be currently present.

Means of Introduction: This species was intentionally stocked for the purpose of preserving an endangered species.

Status: The fish at Shoshone Ponds survived at least one month (Hubbs et al. 1974); however, the population later died out for unknown reasons (U.S. Fish and Wildlife Service 1983a). The population at Hot Creek Valley also failed (Clemmer, personal communication).

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: Listed as federally endangered species in 1967 (U.S. Fish and Wildlife Service 1983a; Page and Burr 1991). The Shoshone Ponds facility was specially constructed by the Bureau of Land Management for endangered fish conservation. Species' decline coincided with introduction of shortfin molly, Poecilia mexicana, which occurred circa 1963, and with habitat alteration (U.S. Fish and Wildlife Service 1983a).

Other Resources:
FishBase Summary

Author: Leo Nico, and Pam Fuller

Revision Date: 8/28/2019

Peer Review Date: 8/27/1999

Citation Information:
Leo Nico, and Pam Fuller, 2024, Moapa coriacea Hubbs and Miller, 1948: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=571, Revision Date: 8/28/2019, Peer Review Date: 8/27/1999, Access Date: 6/21/2024

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 [6/21/2024].

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