The Collaborative International Dictionary of English v.0.48:

Annulosa \An"nu*lo"sa\, n. pl. [NL.] (Zool.)
   A division of the Invertebrata, nearly equivalent to the
   Articulata. It includes the Arthoropoda and Anarthropoda. By
   some Zoologists it is applied to the former only.
   [1913 Webster]