What does annuloida mean?
The definition of annuloida
An`nu*loid”a, n. pl.
Etym: [NL., fr. L. annulus ring + -oid.] (Zoöl.)

A division of the Articulata, including the annelids and allied groups; sometimes made to include also the helminths and echinoderms. [Written also Annuloidea.]