The Collaborative International Dictionary of English v.0.48:

Paludinous \Pa*lu"di*nous\, a.
   1. (Zool.)
      (a) Paludinal.
      (b) Like or pertaining to the genus Paludina.
          [1913 Webster]

   2. Of or pertaining to a marsh or fen. [R.]
      [1913 Webster]