The Collaborative International Dictionary of English v.0.48:

Carcharias \Carcharias\ prop. n.
   The type and sole genus of Carchariidae; the sand sharks.

   Syn: genus Carcharias, Odontaspis, genus Odontaspis.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Carcharias
    n 1: type and sole genus of Carchariidae: sand sharks [syn:
         Carcharias, genus Carcharias, Odontaspis, genus
         Odontaspis]