Unio mancus

Unio mancus is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.


 * Subspecies:
 * Unio mancus mancus Lamarck, 1819
 * Unio mancus requienii Michaud, 1831
 * Unio mancus turtonii Payraudeau, 1826

Distribution
This species can be found from northeast Spain throughout the Mediterranean zone, northeast Africa and in the Middle East. It is present in Austria, Bosnia and Herzegovina, Croatia, Cyprus, France, Greece, Italy, Lebanon, Montenegro, Slovenia, Spain, Switzerland, Syria and Turkey.

Description
Shells of Unio mancus usually reach a size of 55 - 65 mm, with a maximum of 10 cm. These freshwater mussels have a dark brown or yellowish-green periostracum. The shells are equivalve, inequilateral and oval-shaped, with a rounded anterior margin and a truncated posterior margin. The inner is iridescent white.