scaphocerite

from The Collaborative International Dictionary of English v.0.48

Scaphocerite \Scaph`o*ce"rite\, n. [Gr. ska`fh boat + E.
   cerite.] (Zool.)
   A flattened plate or scale attached to the second joint of
   the antennae of many Crustacea.
   [1913 Webster]