zaphrentis

from The Collaborative International Dictionary of English v.0.48

Zaphrentis \Za*phren"tis\, n. [NL.] (Paleon.)
   An extinct genus of cyathophylloid corals common in the
   Paleozoic formations. It is cup-shaped with numerous septa,
   and with a deep pit in one side of the cup.
   [1913 Webster]