Tan riffleshell (Epioblasma florentina walkeri (=e. walkeri))

Federal Register | Recovery | Critical Habitat | Conservation Plans | Petitions | Life History

Listing Status:   


  • States/US Territories in which the Tan riffleshell, Wherever found is known to or is believed to occur:  Kentucky , Tennessee , Virginia
  • US Counties in which the Tan riffleshell, Wherever found is known to or is believed to occur:  View All
Current Listing Status Summary
Status Date Listed Lead Region Where Listed
1977-09-26 Southeast Region (Region 4) Wherever found

» Federal Register Documents

Federal Register Documents
Date Citation Page Title
1977-08-23 00:00:00.0 42 FR 42351 42353 Determination of Endangered Status for Tan Riffle Shell; 42 FR 42351 42353 (Epioblasma walkeri)
1975-09-26 00:00:00.0 40 FR 44329 44333 CITES: Proposed Endangered Status for 216 Species on Convention Appendix I; 40 FR 44392 44333
2007-09-21 00:00:00.0 72 FR 54057 54059 5-Year Review of 16 Southeastern Species

» Recovery

Current Recovery Plan(s)
Date Title Plan Action Status Plan Status
1984-10-22 Tan Riffleshell Mussel View Implementation Progress Final
Other Recovery Documents
Date Citation Page Title Document Type
2007-09-21 72 FR 54057 54059 5-Year Review of 16 Southeastern Species
  • Notice 5-year Review, Initiation
Five Year Review
Date Title
2013-09-26 Tan Riffleshell (Epioblasma florentina walkeri) 5-Year Review: Summary and Evaluation

» Critical Habitat

No critical habitat rules have been published for the Tan riffleshell.

» Conservation Plans

No conservation plans have been created for Tan riffleshell.

» Petitions

» Life History

Habitat Requirements

Relatively silt-free substrates of sand, gravel, and cobble in good flows of smaller streams.

Food Habits

Suspension feeder on plankton; deposit feeder on bacteria and organic matter in substrate.

Movement / Home Range


Reproductive Strategy

Separate sexes, males releasing sperm to water column, where females uptake while filter-feeding/respiring. A long-term breeder, meaning having a protracted spawning season lasting several months in the warm season. Specialized larvae termed glochidia brooded in females gills; glochidia require host fish for several week parasitic stage on gills. Darters serve as host fishes, which females attract with modified mantle tissues.

» Other Resources

NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.

ITIS Reports -- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.