Epioblasma stewardsonii

Epioblasma stewardsonii
Conservation status
	; Extinct (IUCN 2.3)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Unionida
Family:	Unionidae
Genus:	Epioblasma
Species:	E. stewardsonii
Binomial name
	Epioblasma stewardsonii; (I. Lea, 1852)
Synonyms
	Dysnomia stewardsoni I. Lea, 1852

Epioblasma stewardsonii, the Cumberland leafshell or Steward's pearly mussel, is an extinct species of freshwater mussel in the family Unionidae.

This species was endemic to the drainages of the Cumberland River and the Tennessee River in the United States. Its natural habitat was riffle areas in large to medium size rivers. Like most other members of this sensitive genus, it became extinct due habitat destruction and pollution. The last documented occurrence of this species was in 1909.[2]

It appears to be most closely related to Epioblasma flexuosa, which is also now extinct.[3]

References

Bogan, A.E. 2000. Epioblasma stewardsonii. 2006 IUCN Red List of Threatened Species. Downloaded on 7 August 2007.
NatureServe Explorer
Johnson, R.I. (1978). "Systematics and zoogeography of Plagiola (= Dysnomia = Epioblasma), an almost extinct genus of freshwater mussels (Bivalvia: Unionidae) from Middle North America". Bulletin of the Museum of Comparative Zoology. 148: 239–321.

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[iucn-1] Bogan, A.E. 2000. Epioblasma stewardsonii. 2006 IUCN Red List of Threatened Species. Downloaded on 7 August 2007.

[2] NatureServe Explorer

[3] Johnson, R.I. (1978). "Systematics and zoogeography of Plagiola (= Dysnomia = Epioblasma), an almost extinct genus of freshwater mussels (Bivalvia: Unionidae) from Middle North America". Bulletin of the Museum of Comparative Zoology. 148: 239–321.