Key Identification Features
- Lampsilis siliquoidea, commonly called the fatmucket clam, can be identified by its brown shell marked with dark rays.
For instant identification in the field, use the iNature app — AI-powered, works offline.
🦋 Identification Guide
How to Identify Unionidae
Unionidae is a animal family in the Animalia kingdom, order Unionida, class Bivalvia. The family contains 106 accepted species worldwide.
Representative Unionidae Species
Theliderma cylindrica (Say, 1817)
Theliderma cylindrica (Say, 1817)
The rabbitsfoot (Theliderma cylindrica) is a United States-native freshwater riv…
Ligumia recta (Lamarck, 1819)
Ligumia recta (Lamarck, 1819)
Ligumia recta, the black sandshell, is a large eastern North American freshwater…
Lampsilis cardium Rafinesque, 1820
Lampsilis cardium Rafinesque, 1820
Lampsilis cardium, the plain pocketbook, is a native freshwater unionid mussel f…
Sagittunio subrostratus (Say, 1831)
Sagittunio subrostratus (Say, 1831)
Sagittunio subrostratus, the pondmussel or black pondmussel, is a freshwater Uni…
Anodonta anatina (Linnaeus, 1758)
Anodonta anatina (Linnaeus, 1758)
Anodonta anatina is a European-Siberian freshwater bivalve species recorded acro…
Cyrtonaias tampicoensis (I.Lea, 1838)
Cyrtonaias tampicoensis (I.Lea, 1838)
Cyrtonaias tampicoensis is a river-dwelling North American freshwater mussel tha…
Potamilus alatus (Say, 1817)
Potamilus alatus (Say, 1817)
The pink heelsplitter (Potamilus alatus) is a native eastern North American fres…
Arcidens confragosus (Say, 1829)
Arcidens confragosus (Say, 1829)
Arcidens confragosus is a freshwater mussel species with distinct shell traits f…
Alasmidonta viridis (Rafinesque, 1820)
Alasmidonta viridis (Rafinesque, 1820)
Alasmidonta viridis, the slippershell mussel, is a non-threatened unionid river …
Elliptio crassidens (Lamarck, 1819)
Elliptio crassidens (Lamarck, 1819)
Elliptio crassidens, the elephant-ear, is a North American freshwater unionid mu…
Lampsilis siliquoidea (Barnes, 1823)
Lampsilis siliquoidea (Barnes, 1823)
Lampsilis siliquoidea, the fatmucket clam, is a widespread North American freshw…
Ortmanniana ligamentina (Lamarck, 1819)
Ortmanniana ligamentina (Lamarck, 1819)
Ortmanniana ligamentina is a large freshwater mussel native to eastern North Ame…
Frequently Asked Questions
How do you identify Unionidae?
Unionidae animals belong to the Unionida order in the Animalia kingdom. Lampsilis siliquoidea, commonly called the fatmucket clam, can be identified by its brown shell marked with dark rays. For instant identification, use the iNature app — AI-powered and works offline.
What are the key characteristics of Unionidae?
Unionidae is classified in the order Unionida, class Bivalvia, phylum Mollusca. The family contains 106 accepted species worldwide.
Sources: GBIF, iNaturalist, Wikipedia · Disclaimer
Start Exploring Nature Today
Download iNature for free. 10 identifications on us. No account needed. No credit card required.
Download Free on App Store
