The Collaborative International Dictionary of English v.0.48:

Angwantibo \An`gwan*ti"bo\, n. (Zool.)
   A small lemuroid mammal (Arctocebus Calabarensis) of
   Africa. It has only a rudimentary tail.
   [1913 Webster]

WordNet (r) 3.0 (2006):

angwantibo
    n 1: a kind of lemur [syn: angwantibo, golden potto,
         Arctocebus calabarensis]