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.

Exoglossum laurae
Exoglossum laurae
(Tonguetied Minnow)
Native Transplant

Copyright Info
Exoglossum laurae (Hubbs, 1931)

Common name: Tonguetied Minnow

Taxonomy: available through www.itis.govITIS logo

Identification: Smith (1985); Page and Burr (1991); Jenkins and Burkhead (1994).

Size: 16 cm.

Native Range: Three disjunct areas of upper Ohio River basin; upper Allegheny River drainage, New York and Pennsylvania; upper New River drainage, West Virginia, Virginia, and North Carolina; and Great Miami and Little Miami River systems, Ohio; also in upper Genesee River (Lake Ontario drainage), New York and Pennsylvania (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: Although the Tonguetied Minnow is generally regarded as native to the Monongahela system, Ohio River drainage, of West Virginia, Stauffer et al. (1995) indicated its presence in that water body may have been the result of a past introduction.

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 Exoglossum laurae are found here.

StateFirst ObservedLast ObservedTotal HUCs with observations†HUCs with observations†
WV195119511Tygart Valley

Table last updated 2/27/2023

† Populations may not be currently present.

Means of Introduction: Unknown; possible bait bucket release.

Status: Based on information given in Stauffer et al. (1995), this species is apparently established, possibly introduced, in Monongahela drainage, West Virginia.

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: In their discussion of the species, Stauffer et al. (1995) reported that there is one record of E. laurae from the Tygart Valley River, a Monongahela River tributary, which they indicated was the only record of the species in West Virginia outside of the New and lower Kanawha drainages. However, only in their table on page 14 of their book did Stauffer et al. (1995) hint that the species may have been introduced to the Monongahela drainage.

Other Resources:
FishBase Summary

Author: Nico, L.

Revision Date: 4/30/2018

Peer Review Date: 6/23/2000

Citation Information:
Nico, L., 2023, Exoglossum laurae (Hubbs, 1931): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=529, Revision Date: 4/30/2018, Peer Review Date: 6/23/2000, Access Date: 3/21/2023

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. [2023]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [3/21/2023].

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