Truncilla cognata (Lea, 1860)

Mexican fawnsfoot

Taxonomy & Nomenclature

Synonym/s: Unio cognatus Lea, 1860; Truncilla cognate (Lea, 1860)

Conservation Status

Last record: 1975

Rediscovered.

Distribution

Texas, USA & Nuevo Leon, Mexico

Biology & Ecology

Hypodigm

Media

References

Brewster, B. E. 2015. Conservation status and habitat assessment of the Mexican Fawnsfoot (Truncilla cognata) in the Rio Grande. MS thesis, Texas A&M International, Laredo, Texas.

Lyubov E. Burlakova, David Campbell, and Alexander Y. Karatayev. (2019). Status of Rare Endemic Species: Molecular Phylogeny, Distribution and Conservation of Freshwater Molluscs Truncilla macrodon and Truncilla cognata in Texas. Malacologia 62(2): 345-363. [Abstract]

Burlakova, L.E., A.Y. Karatayev, V.A. Karatayev, M.E. May, D.L. Bennett, and M.J. Cook. 2011. Endemic species: contribution to community uniqueness, effect of habitat alteration, and conservation priorities. Biological Conservation 144(1):155-165.

Graf, Daniel L., and Kevin S. Cummings. (2007). Review of the systematics and global diversity of freshwater mussel species (Bivalvia: Unionoida). Journal of Molluscan Studies, vol. 73, part 4: 291-314.

Graf, Daniel L. and Cummings, Kevin S. (2021). A ‘big data’ approach to global freshwater mussel diversity (Bivalvia: Unionoida), with an updated checklist of genera and species. Journal of Molluscan Studies 87(1): eyaa034.

Haag, Wendell R. (2009). Past and future patterns of freshwater mussel extinctions in North America during the Holocene, pp. 107-128. In: Turvey, Samuel T. (ed.). Holocene Extinctions. Oxford, UK & New York, USA: Oxford University Press. xii + 352 pp.

Howard, A.D. 1915. Some exceptional cases of breeding among the Unionidae. The Nautilus 29:4-11.

Howells, R.G. 1994. Distributional surveys of freshwater mussels bivalves in Texas: progress report for 1992. Texas Parks and Wildlife Department, Management Data Series 105, Austin, Texas.

Howells, R.G. 1995. Distributional surveys of freshwater mussels bivalves in Texas: progress report for 1993. Texas Parks and Wildlife Department, Management Data Series 119, Austin, Texas.

Howells, R.G. 1996a. Distributional surveys of freshwater mussels bivalves in Texas: progress report for 1994. Texas Parks and Wildlife Department, Management Data Series 120, Austin, Texas.

Howells, R.G. 1996b. Distributional surveys of freshwater mussels bivalves in Texas: progress report for 1995. Texas Parks and Wildlife Department, Management Data Series 125: Austin, Texas.

Howells, R.G. 1997c. Distributional surveys of freshwater mussels bivalves in Texas: progress report for 1996. Texas Parks and Wildlife Department, Management Data Series 144: Austin, Texas.

Howells, R.G. 1998. Distributional surveys of freshwater mussels bivalves in Texas: progress report for 1997. Texas Parks and Wildlife Department, Management Data Series 147: Austin, Texas.

Howells, R.G. 1999. Recent freshwater mussel surveys of the Rio Grande and Big Bend region. Triannual Unionid Report, 17: unpaginated.

Howells, R.G. 2000. Recent freshwater-mussel surveys of the Rio Grande, Texas and Mexico. Triannual Unionid Report, 19: unpaginated.

Howells, R.G. 2004. Last stand for mussels of the Rio Bravo? Eye on Nature (Texas Parks and Wildlife), spring, 2004: 2.

Howells, R.G., C.M. Mather, and J.A.M. Bergmann. 1997. Conservation status of selected freshwater mussels in Texas. Pages 117-126 in K. S. Cummings, A. C. Buchanan, C. A. Mayer, and T. J. Naimo. Conservation and Management of Freshwater Mussels II: initiatives for the future, Proceedings of a UMRCC Symposium, 16-18 October, 1995, St. Louis, Missouri. Upper Mississippi River Conservation Committee, Rock Island, Illinois.

Howells, R.G., R.W. Neck, and H.D. Murray. 1996. Freshwater Mussels of Texas. Texas Parks and Wildlife Press: Austin, Texas. 218 pp.

Johnson, R.I. 1999. Unionidae of the Rio Grande (Rio Bravo del Norte) system of Texas and Mexico. Occasional Papers on Mollusks, 6(77): 1-65.

Karatayev, A.Y., T.D. Miller, and L.E. Burlakova. 2012. Long-term changes in unionid assemblages in the Rio Grande, one of the World's top 10 rivers at risk. Aquatic Conservation: Marine and Freshwater Ecosystems 22:206-219.

Lefevre, G. and W.T. Curtis. 1912. Studies on the reproduction and artificial propogation of fresh-water mussels. Bulletin of the Bureau of Fisheries 30:102-201.

Moyle, P. and J. Bacon. 1969. Distribution and abundance of molluscs in a fresh water environment. Journal of the Minnesota Academy of Science 35(2-3): 82-85.

NatureServe. 2019. NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available http://explorer.natureserve.org. (Accessed: November 29, 2019 ).

Neves, R.J. 1993. A state-of-the unionid address. Pages 1-10 in K.S. Cummings, A.C. Buchanan, and L.M. Koch (eds.) Conservation and management of freshwater mussels. Proceedings of a UMRCC symposium, October 1992, St. Louis, Missouri. Upper Mississippi River Conservation Committee, Rock Island, Illinois.

Neves, R.J. and J.C. Widlak. 1987. Habitat ecology of juvenile freshwater mussels (Bivalvia: Unionidae) in a headwater stream in Virginia. American Malacological Bulletin, 5: 1-7.

Randklev, C. R., T. Miller, M. Hart, J. Morton, N. A. Johnson, K. Skow, K. Inoue, E. T. Tsakiris, S. Oetker, R. Smith, and C. Robertson. 2018. A semi-arid river in distress: Contributing factors and recovery solutions for three imperiled freshwater mussels (Family Unionidae) endemic to the Rio Grande basin in North America. Science of the Total Environment 631(2018):733-744.

Simpson, C.T. 1914. A Descriptive Catalogue of the Naiades or Pearly Fresh-water Mussels. Bryant Walker: Detroit, Michigan. 1540 pp.

Strayer, D. 1983. The effects of surface geology and stream size on freshwater mussel (Bivalvia, Unionidae) distribution in southeastern Michigan, U.S.A. Freshwater Biology 13:253-264.

Strayer, D.L. 1999a. Use of flow refuges by unionid mussels in rivers. Journal of the North American Benthological Society 18(4):468-476.

Strayer, D.L. and J. Ralley. 1993. Microhabitat use by an assemblage of stream-dwelling unionaceans (Bivalvia) including two rare species of Alasmidonta. Journal of the North American Benthological Society 12(3):247-258.

Suckling, Kieran, Slack, Rhiwena and Nowicki, Brian. (2004). [url=http://xxx.biologicaldiversity.org/publications/papers/ExtinctAndESA.pdf]Extinct and the Endangered Species Act[/url]. Centre For Biological Diversity. 63 pp.

Turgeon, D. D., A. E. Bogan, E. V. Coan, W. K. Emerson, W. G. Lyons, W. Pratt, et al. (1988). Common and scientific names of aquatic invertebrates from the United States and Canada: mollusks. American Fisheries Society Special Publication 16: vii + 277.

Turgeon, D.D., J.F. Quinn, Jr., A.E. Bogan, E.V. Coan, F.G. Hochberg, W.G. Lyons, P.M. Mikkelsen, R.J. Neves, C.F.E. Roper, G. Rosenberg, B. Roth, A. Scheltema, F.G. Thompson, M. Vecchione, and J.D. Williams. 1998. Common and scientific names of aquatic invertebrates from the United States and Canada: Mollusks. 2nd Edition. American Fisheries Society Special Publication 26, Bethesda, Maryland: 526 pp.

U.S. Fish and Wildlife Service (USFWS). 2016. Review of Native Species that are Candidates for Listing as Endangered or Threatened; Annual Notification of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions. Federal Register 81(232): 87246-87272.

Van der Schalie, H. 1938a. The naiad fauna of the Huron River in southeastern Michigan. Miscellaneous Publication of the Museum of Zoology, University of Michigan 40:7-78. [relevant reference?]

Watters, G.T. 1992a. Unionids, fishes, and the species-area curve. Journal of Biogeography 19:481-490.

Williams, J. D., A. E. Bogan, R. S. Butler, K. S. Cummings, J. T. Garner, J. L. Harris, N. A. Johnson, and G. T. Watters. 2017. A revised list of the freshwater mussels (Mollusca: Bivalvia: Unionida) of the United States and Canada. Freshwater Mollusk Biology and Conservation 20:33-58.

Williams, James D., Melvin L. Warren, Kevin S. Cummings, John L. Harris, and Richard J. Neves. (1993). Conservation status of the freshwater mussels of the United States and Canada. Fisheries, vol. 18, no. 9: 6-22.

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