Noturus gyrinus
Noturus gyrinus
(Tadpole Madtom)
Native Transplant
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Noturus gyrinus (Mitchill, 1817)

Common name: Tadpole Madtom

Taxonomy: available through www.itis.govITIS logo

Identification: Becker (1983); Page and Burr (1991); Etnier and Starnes (1993); Jenkins and Burkhead (1994).

Size: 13 cm.

Native Range: Atlantic and Gulf Slope drainages from New Hampshire to Nueces River, Texas; St. Lawrence-Great Lakes, Hudson Bay (Red River), and Mississippi River basins from southern Quebec to southern Saskatchewan, and south to Gulf. Absent from Appalachian and Ozark Highlands (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: The Tadpole Madtom is known from the Snake and Boise rivers in Idaho (Linder 1963;Taylor 1969; Simpson and Wallace 1978; Wydoski and Whitney 1979; Idaho Fish and Game 1990); the upper Chicopee and Thames rivers in Massachusetts (Hartel 1992; Cardoza et al. 1993; Hartel et al. 1996); Frenchman's Creek, Hitchcock County in Nebraska (Jones 1963);the Merrimack River drainage in New Hampshire (Taylor 1969; Scarola 1973); the Muskingum drainage in Ohio (Hocutt et al. 1986); the Snake River drainage in Oregon (Taylor 1969; Bond 1973, 1994; Wydoski and Whitney 1979); the Rio Grande River in Texas (Hubbs et al. 1991); and the Columbia River in Washington, near the mouth of the Walla Walla River (Wydoski and Whitney 1979).

Means of Introduction: Unintentional in most locations. It is believed that introduced channel catfish and bullhead stock was contaminated with Tadpole Madtoms (Linder 1963; Taylor 1969; Simpson and Wallace 1978; Wydoski and Whitney 1979; Hartel 1992).

Status: Established in Connecticut, Idaho, Massachusetts, New Hampshire, Ohio, Oregon, and Washington; reported in Nebraska and Texas.

Impact of Introduction: Unknown.

Remarks: Introduced populations in Washington resulted from the downriver dispersal of fish introduced into Idaho rivers (Wydoski and Whitney 1979). The Tadpole Madtom has not been collected from the Thames drainage in Connecticut (B. Gerrish, personal communication). Record from a lake near Poteau, Oklahoma, may be the result of an introduction (Taylor 1969).

References: (click for full references)

Becker, G. C. 1983. Fishes of Wisconsin. University of Wisconsin Press, Madison, WI.

Etnier, D. A., and W. C. Starnes. 1993. The fishes of Tennessee. University of Tennessee Press, Knoxville, TN.

Hartel, K. E. 1992. Non-native fishes known from Massachusetts freshwaters. Occasional Reports of the Museum of Comparative Zoology, Harvard University, Fish Department, Cambridge, MA. 2. September. pp. 1--9.

Hubbs, C., R. J. Edwards, and G. P. Garrett. 1991. An annotated checklist of freshwater fishes of Texas, with key to identification of species. Texas Journal of Science, Supplement 43(4):1--56.

Idaho Fish and Game. 1990. Fisheries Management Plan 1991--1995. Appendix I -- A list of Idaho fishes and their distribution by drainage. Idaho Fish and Game.

Jenkins, R. E., and N. M. Burkhead. 1994. Freshwater fishes of Virginia. American Fisheries Society, Bethesda, MD.

Jones, D. J. 1963. A history of Nebraska's fisheries resources. Dingell-Hohnson Federal Aid in Fish Restoration Project F-4-R Publication. Nebraska Game, Forestation and Parks Commission.

Linder, A. D. 1963. Idaho's alien fishes. Tebiwa 6(2):12--15.

Page, L. M., and B. M. Burr. 1991. A field guide to freshwater fishes of North America north of Mexico. The Peterson Field Guide Series, volume 42. Houghton Mifflin Company, Boston, MA.

Scarola, J. F. 1973. Freshwater fishes of New Hampshire. New Hampshire Fish and Game Department, Division of Inland and Marine Fisheries. 131 pp.

Simpson, J., and R. Wallace. 1978. Fishes of Idaho. University of Idaho Press, Moscow, ID.

Wydoski, R. S., and R. R. Whitney. 1979. Inland fishes of Washington. University of Washington Press, Seattle, WA.

Other Resources:
FishBase Summary

Author: Fuller, P.

Revision Date: 4/19/2006

Peer Review Date: 4/1/2016

Citation Information:
Fuller, P., 2018, Noturus gyrinus (Mitchill, 1817): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL,, Revision Date: 4/19/2006, 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


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

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