Unio (bivalve)

Unio; Temporal range: Late Jurassic–Recent PreꞒ Ꞓ O S D C P T J K Pg N
	A shell of Unio pictorum (Painter's mussel), anterior end towards the left
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Unionida
Family:	Unionidae
Subfamily:	Unioninae
Tribe:	Unionini
Genus:	Unio; Philipsson [se], 1788
Species
	See text
Synonyms
	Batavusiana Bourguignat, 1889 (superseded rank); Batavusiana (Crassunio) Modell, 1964 (a junior synonym); Cafferia C. T. Simpson, 1900 junior subjective synonym; Consentunio Jatsko, 1972 (junior subjective synonym); Crassiana Servain, 1882 junior subjective synonym; Crassunio Modell, 1964 (junior objective synonym); Eolymnium Prashad, 1919 junior subjective synonym; Eolymnium (Shadininaia) Starobogatov, 1983 (a junior synonym); Limnium (incorrect subsequent spelling of Lymnium); Lymnium Moquin-Tandon, 1856; Margarita (Unio) Philipsson, 1788 (reversed priority of genus-group names); Margaron (Unio) Philipsson, 1788 (reversed priority of genus-group names); Mysca W. Turton, 1822 junior subjective synonym; Nemrodia Pallary, 1939 (unavailable; the name published without designating a type species); † Ningxiaconcha Q.-H. Ma, 1991 junior subjective synonym; Nodularia (Cafferia) C. T. Simpson, 1900 superseded combination; Pictunio Jatsko, 1972 (junior objective synonym of Unio); Unio (Bataviana) Servain, 1882 (a junior synonym); Unio (Batavusiana) Bourguignat, 1889 (a junior synonym); Unio (Cafferia) C. T. Simpson, 1900 superseded combination; Unio (Consentunio) Jatsko, 1972 (junior subjective synonym); Unio (Crassiana) Servain, 1882 junior subjective synonym; Unio (Crassunio) Modell, 1964 (junior objective synonym); Unio (Eolymnium) Prashad, 1919 junior subjective synonym; Unio (Limnium) [sic] (incorrect subsequent spelling of Lymnium; synonym); Unio (Lymnium) Moquin-Tandon, 1856; Unio (Nemrodia) Pallary, 1939 (original rank); Unio (Tumidunio) Jatsko, 1972; Unio (Tumidusiana) Locard, 1889; Unio (Unio) Philipsson, 1788; Unionea Rafinesque, 1815 (unnecessary substitute name or unjustified emendation of Unio); Unis F. W. Hutton, 1883 (orthographic variant);

Unio is a genus of medium-sized freshwater mussels, aquatic bivalve mollusks in the family Unionidae, the river mussels. They are found throughout Europe, Africa, and the Middle East, with some species introduced to East Asia. Fossil species are also known from the Jurassic of North America.^[1]