Pentamerus

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Pentamerus \Pen*tam"e*rus\, n. [NL. See {Pentamerous}.]
     (Paleon.)
     A genus of extinct Paleozoic brachiopods, often very abundant
     in the Upper Silurian.
     [1913 Webster]
  


     {Pentamerus limestone} (Geol.), a Silurian limestone composed
        largely of the shells of Pentamerus.
        [1913 Webster]