Pyganodon grandis, the giant floater, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. This species is fast-growing, large, and has a short lifespan. It is variable and widespread[3] across the United States and southeastern Canada.
Quick Facts Conservation status, Scientific classification ...
Pyganodon grandis |
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Scientific classification |
Domain: |
Eukaryota |
Kingdom: |
Animalia |
Phylum: |
Mollusca |
Class: |
Bivalvia |
Order: |
Unionida |
Family: |
Unionidae |
Genus: |
Pyganodon |
Species: |
P. grandis |
Binomial name |
Pyganodon grandis
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Synonyms[2] |
- Anodonta grandis Say, 1829
- Anodonta grandis subsp. grandis Say, 1829
- Anodonta grandis subsp. simpsoniana Lea, 1861
- Anodonta grandis subsp. corpulenta Cooper, 1834
- Anodonta lugubris Say, 1829
- Anodonta inflata Rafinesque, 1831
- Anodonta stewartiana Lea, 1834
- Symphynota benedictensis Lea, 1834
- Anodonta corpulenta Cooper, 1834
- Anodonta plana Lea, 1834
- Anodonta declivis Conrad, 1834
- Anodonta gigantea Lea, 1838
- Anodonta ovata Lea, 1838
- Anodonta salmonia Lea, 1838
- Anodonta decora Lea, 1838
- Anodonta pepinianus Lea, 1838
- Anodonta harpethensis Lea, 1840
- Anodonta footiana Lea, 1840
- Anodonta maryattana Lea, 1840
- Anodonta globosa Lea, 1841
- Anodonta virens Lea, 1852
- Anodonta linnaeana Lea, 1852
- Anodonta opaca Lea, 1852
- Anodonta lewisii Lea, 1857
- Anodonta danielsii Lea, 1858
- Anodonta gesnerii Lea, 1858
- Anodonta texasensis Lea, 1859
- Anodonta kennicottii Lea, 1861
- Anodonta simpsoniana Lea, 1861
- Anodonta leonensis Lea, 1862
- Anodonta dallasiana Lea, 1863
- Anodonta bealei Lea, 1863
- Anodon subangulata J.G. Anthony, 1865
- Anodon subinflata J.G. Anthony, 1865
- Anodon imbricata J.G. Anthony, 1865
- Anodon micans J.G. Anthony, 1865
- Anodon opalina J.G. Anthony, 1865
- Anodon mcnielii J.G. Anthony, 1866
- Anodon subgibbosa J.G. Anthony, 1866
- Anodon inornata J.G. Anthony, 1866
- Anodon nopalatensis Sowerby, 1867
- Margaron benedictii Lea, 1870
- Anodonta sulcata Küster, 1873
- Anodonta somersii Call, 1880
- Anodonta houghtonensis Currier in DeCamp, 1881
- Anodonta grijalvae Morelet, 1884
- Anodonta tabascensis Morelet, 1884
- Anodonta dakota Frierson, 1910
- Anodonta dakotana Utterback, 1915
- Anodonta inflata subsp. viridis Rafinesque, 1831
- Anodonta inflata subsp. fuscata Rafinesque, 1831
- Anodonta inflata subsp. zonalis Rafinesque, 1831
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Original description (Say 1829): "Shell very large, subovate; disk unequally wrinkled and undulated transversely, dark yellowish brown; umbo elevated; beak slightly elevated, with generally, two or three small sinuous, acute undulations; hinge margin slightly arquated, sometimes nearly rectilinear, somewhat angulated at its anterior termination, thence the edge descends by a nearly rectilinear, or slightly concave line to the anterior margin, which is considerably narrowed; sinus of the hinge margin concave; posterior margin widely rounded; within white margined, particularly before, with dusky."
- Binney, W.G. 1858. The complete writings of Thomas Say on the conchology of the United States. Bailliere Publ. NY
- Haag, W. R. (2012). North American Freshwater Mussels: Natural History, Ecology, and Conservation. Cambridge University Press. ISBN 978-0521199384
- Say, T. 1829. Descriptions of some new terrestrial and fluviatile shells of North America. New Harmony Disseminator of Useful Knowledge, New Harmony, Indiana. (see the description also in Binney's summary of Say's writing, 1858). This article incorporates text from this source, which is in the public domain.