n. pl.1.(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.
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Metaplica with narrow surface exposing telopodite and telocoxal spines, with margin not formed into lobes; apical margin of proplica horizontal with telocoxal spines emerging from distal median margin with apices directed posteriorly annulosa Kraus, 1958