title: Malleus (bivalve)
text: # Malleus (bivalve)
  
  Malleus is a genus of hammer oysters (marine bivalve mollusks) in the family Malleidae. This genus includes 27 known species.
  
  Characteristic of this genus is the unusual "hammer-shaped" outline of the valves. The shells are nearly equivalved, but the hinge line is extremely long and is at nearly a right angle to the rest of the valves, which grow ventrally. The viscera of the organism are arranged in an oval-shaped patch near the umbones of the valves.
  
  ## Species
  
  * Malleus albus Lamarck, 1819
  * Malleus anatinus (Gmelin, 1791)
  * Malleus candeanus (d'Orbigny, 1853)
  * Malleus daemoniacus Reeve, 1858
  * Malleus legumen Reeve, 1858
  * Malleus malleus (Linnaeus, 1758)
  * Malleus meridianus Cotton, 1930
  * Malleus regula (Forsskål in Niebuhr, 1775)
  
  ## Gallery
  
  * Malleus malleus (Linnaeus, 1758)
  * Malleus malleus (Linnaeus, 1758)
  * Malleus malleus (Linnaeus, 1758)
  * Malleus malleus (Linnaeus, 1758)
  