Tetrabranchiata definition

Tetrabranchiata





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

  Tetrabranchiata \Tet`ra*bran`chi*a"ta\, n. pl. [NL. See
     {Tetra-}, and {Branchia}.] (Zool.)
     An order of Cephalopoda having four gills. Among living
     species it includes only the pearly nautilus. Numerous genera
     and species are found in the fossil state, such as Ammonites,
     Baculites, Orthoceras, etc.


     [1913 Webster]

















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