The Collaborative International Dictionary of English v.0.48:

Anomural \An`o*mu"ral\, Anomuran \An`o*mu"ran\, a.
   Irregular in the character of the tail or abdomen; as, the
   anomural crustaceans. [Written also anomoural,
   anomouran.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Anomuran \An`o*mu"ran\, n. (Zool.)
   One of the Anomura.
   [1913 Webster]