Rabbitsfoot
Museum specimen
Conservation status
Near Threatened  (IUCN 3.1)[1]
Vulnerable  (NatureServe)[2]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Unionida
Family:	Unionidae
Genus:	Theliderma
Species:	T. cylindrica
Binomial name
Theliderma cylindrica (Say, 1817)
Synonyms[3]
List Quadrula cylindrica (Say, 1817) Quadrula cylindrica subsp. cylindrica (Say, 1817) Quadrula cylindrica subsp. strigillata (B.H. Wright, 1898) Unio cylindricus Say, 1817 Unio naviformis Lamarck, 1819 Unio solenoides Rafinesque, 1820 Unio solenoides subsp. nodosa Rafinesque, 1820 Unio solenoides subsp. interrupta Rafinesque, 1820 Unio cylindricus subsp. strigillatus B.H. Wright, 1898 Unio cilindricus subsp. propetipicus de Gregorio, 1914 Unio cilindricus subsp. acrispatus de Gregorio, 1914

The rabbitsfoot (Theliderma cylindrica) is a species of freshwater mussel. It is an aquatic bivalve mollusk, in the family Unionidae, the river mussels.

This species is native to the United States, where it is widespread in the drainages of the Ohio River and the Great Lakes. It has disappeared from over half its historic range.^[2]

Two subspecies have been described. It is unclear whether they represent distinct evolutionary lineages, or are merely ecophenotypic variation which would not warrant any taxonomic status. A 2007 genetic study has cast doubt upon the validity of the existence of two subspecies.^{[citation needed]}

• Theliderma cylindrica cylindrica (Say, 1817) —
• Theliderma cylindrica strigillata (Wright, 1898) — Rough rabbitsfoot, found only in the headwaters of the Tennessee River.

Quadrula cylindrica cylindrica has been listed as an Endangered Species Act (ESA) threatened species of the United States since 2013.^[4][5] Quadrula cylindrica strigillata has been listed as an ESA endangered species since 1997.^[6][7]

• List of non-marine molluscs of the United States

This Unionidae-related article is a stub. You can help Wikipedia by expanding it.

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