palliobranchiate

from The Collaborative International Dictionary of English v.0.48

Palliobranchiate \Pal`li*o*bran"chi*ate\, a. [See {Pallium}, and
   {Branchia}.] (Zool.)
   Having the pallium, or mantle, acting as a gill, as in
   brachiopods.
   [1913 Webster]