Unio (genus)
Encyclopedia
Unio is a genus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of medium-sized freshwater mussels, aquatic
Aquatic animal
An aquatic animal is an animal, either vertebrate or invertebrate, which lives in water for most or all of its life. It may breathe air or extract its oxygen from that dissolved in water through specialised organs called gills, or directly through its skin. Natural environments and the animals that...

 bivalve mollusks in the family Unionidae
Unionidae
Unionidae is a family of freshwater mussels, the largest in the order Unionoida, the bivalve mollusks sometimes known as river mussels, naiads, or simply as unionids.The range of distribution for this family is world-wide...

, the river mussels.

Unio is the type genus of the family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 Unionidae
Unionidae
Unionidae is a family of freshwater mussels, the largest in the order Unionoida, the bivalve mollusks sometimes known as river mussels, naiads, or simply as unionids.The range of distribution for this family is world-wide...

.

Species

Species in the genus Unio include:
  • Unio cariei
    Unio cariei
    Unio cariei was a species of medium-sized freshwater mussel, an aquatic bivalve mollusc in the family Unionidae.This species was endemic to the island of Réunion in the Indian Ocean, but it is now extinct.-Source:...

    - extinct
  • Unio crassus Philipsson, 1788 (Thick shelled river mussel) - near threatened
  • Unio mancus Lamarck, 1819
  • Unio elongatulus C. Pfeiffer, 1825
  • Unio pictorum (Linnaeus, 1758) (Painter's mussel)
  • Unio tumidus (Swollen river mussel)
  • Unio turtoni
    Unio turtoni
    Unio turtoni is a species of medium-sized freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.This species is endemic to France and eastern Spain and is rarely found....

  • Unio valentianus Rossmässler, 1854
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