Pyganodon cataracta

{{Short description|Species of bivalve}}

{{Speciesbox

| image = Unionidae - Anodonta cataracta.jpg

| image_caption = The pearly interior of a valve of Pyganodon cataracta at the Museo Civico di Storia Naturale di Milano

|status=LC

|status_system=IUCN3.1

|status_ref={{cite iucn|author1=Cummings, K.|author2=Cordeiro, J.|name-list-style=amp|year=2012|title=Pyganodon cataracta|page=e.T189007A1917221|doi=10.2305/IUCN.UK.2012-1.RLTS.T189007A1917221.en|access-date=6 August 2023}}

| genus = Pyganodon

| species = cataracta

| authority = (Say, 1817)

|synonyms={{collapsible list|bullets=yes|Anodonta cataracta Say, 1817|Anodonta cataracta subsp. cataracta Say, 1817|Anodonta cataracta subsp. marginata Say, 1817|Anodonta marginata Say, 1817|Anodonta atra Rafinesque, 1820|Anodonta cuneata Rafinesque, 1820|Anodonta digonota Rafinesque, 1831|Anodonta teres Conrad, 1834|Anodonta excurvata DeKay, 1843|Anodonta virgulata Lea, 1857|Anodonta dariensis Lea, 1858|Anodonta williamsii Lea, 1862|Anodonta tryonii Lea, 1862|Anodonta doliaris Lea, 1863|Pyganodon marginata (Say, 1817)}}

|synonyms_ref={{ITIS|taxon=Pyganodon cataracta (Say, 1817)|id=568176|access-date=6 August 2023}}

}}

Pyganodon cataracta, formerly Anodonta cataracta, is a species of large freshwater mussel, an aquatic bivalve mollusc in the family Unionidae, the river mussels. Its common name is the eastern floater.