What is a division of the Articulata, including the annelids and allied groups; sometimes made to include also the helminths and echinoderms. [Written also Annuloidea.] called?

annuloida — A division of the Articulata, including the annelids and allied groups; sometimes made to include also the helminths and echinoderms. [Written also Annuloidea.]. (Webster's 1913.)