Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Bivalvia Unionoida Unionidae

Scientific Name: Quadrula fragosa
Species Authority: Conrad, 1835
Common Name(s):
English Rough Maple Leaf Pearly Mussel, Winged Mapleleaf

Assessment Information [top]

Red List Category & Criteria: Critically Endangered A1c ver 2.3
Year Published: 1996
Date Assessed: 1996-08-01
Needs updating
Assessor(s): Bogan, A.E. & Seddon, M.B. (Mollusc Specialist Group)
Previously published Red List assessments:
1994 Endangered (E)
1990 Extinct (Ex)
1988 Extinct (Ex)
1986 Indeterminate (I)

Geographic Range [top]

Range Description: The single known remnant population exists in a 20 km stretch of the lower St. Croix River between Minnesota and Wisconsin.
Countries occurrence:
United States (Arkansas - Regionally Extinct, Kentucky - Regionally Extinct, Minnesota, Tennessee - Regionally Extinct, Wisconsin)
Range Map: Click here to open the map viewer and explore range.

Habitat and Ecology [top]

Conservation Actions [top]

Conservation Actions: Is listed as a federally endangered species in the U.S. The St. Croix River is a National Wild and Scenic River and this designation confers some protection from anthropogenic disturbance of the population.

Citation: Bogan, A.E. & Seddon, M.B. (Mollusc Specialist Group). 1996. Quadrula fragosa. The IUCN Red List of Threatened Species 1996: e.T19040A8792671. . Downloaded on 06 October 2015.
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