n. pl. - 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.
n. pl. - 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.