Share your observations

Share your observations of plants or non-game animals with the Natural Heritage Inventory

Rare animals
Find rare and non-game animals.
Rare plants
Learn about plants on the Natural Heritage Working List.
Rare lichens
Discover Wisconsin's lichens.
Natural communities
Explore Wisconsin's natural communities.
Other features
Discover unique resources.
Eagle license plate

Help care for rare plants and animals by ordering an Endangered Resources plate.

Contact information
For information on Wisconsin's rare vertebrate animals, contact:
Rich Staffen
Conservation Biologist
For information on Wisconsin's rare invertebrates, contact:
Jay Watson
Conservation Biologist

Wisconsin's rare mussels and clams

Mussels and clams on Wisconsin's Natural Heritage Working List – last revised May 2016. Life history, where they are found in the state, photos and management information is available for many of these species. Please consider sharing your observations [exit DNR] with the Wisconsin Natural Heritage Inventory

Click on the table headings to sort the table or sort taxonomically. Choose a species from the list to explore information for that animal. View the table key.
Scientific Name Common Name Global
WWAP Mapped in NHI
Alasmidonta marginata Elktoe G4 S3 SC/P SGCN Y
Alasmidonta viridis Slippershell Mussel G4G5 S2 THR SGCN Y
Anodonta suborbiculata Flat Floater G5 S2S3 SC/P SGCN Y
Arcidens confragosus Rock Pocketbook G4 S1S2 THR SGCN Y
Cumberlandia monodonta Spectaclecase G3 S1 LE END SGCN Y
Cyclonaias tuberculata Purple Wartyback G5 S2 END SGCN Y
Ellipsaria lineolata Butterfly G4G5 S2 END SGCN Y
Elliptio complanata Eastern Elliptio G5 S2S3 SC/P SGCN Y
Elliptio crassidens Elephant Ear G5 S1 END SGCN Y
Epioblasma triquetra Snuffbox G3 S1 LE END SGCN Y
Fusconaia ebena Ebonyshell G4G5 S1 END SGCN Y
Lampsilis higginsii Higgins Eye G1G2 S1 LE END SGCN Y
Lampsilis teres Yellow & Slough Sandshells G5 S1 END SGCN Y
Ligumia nasuta Eastern Pondmussel G4 SU r-SIN N
Megalonaias nervosa Washboard G5 S3 SC/P SGCN Y
Plethobasus cyphyus Sheepnose G3 S1 LE END SGCN Y
Pyganodon lacustris Lake Floater GU SU r-SIN N
Quadrula fragosa Winged Mapleleaf G1 S1 LE END SGCN Y
Quadrula nodulata Wartyback G4 S1S2 THR SGCN Y
Quadrula quadrula Mapleleaf G5 S3 SC/P SGCN Y
Simpsonaias ambigua Salamander Mussel G3 S2 SOC THR SGCN Y
Theliderma metanevra Monkeyface G4 S2 THR SGCN Y
Tritogonia verrucosa Buckhorn G4G5 S2 THR SGCN Y
Truncilla donaciformis Fawnsfoot G5 S1S2 THR SGCN Y
Venustaconcha ellipsiformis Ellipse G4 S3 THR SGCN Y
Villosa iris Rainbow Shell G5 S1 END SGCN Y

Rank and status: To learn more about species rank and status, see the working list key. WWAP: (Wisconsin Wildlife Action Plan): SGCN (Species of Greatest Conservation Need) and monitoring and ranking SIN (Species with Information Needs). Mapped in NHI: (Natural Heritage Inventory): Y = Observations of these species are mapped into the NHI database.

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Last revised: Thursday, December 22, 2022