Phylum ANNELIDA: Intro., Polychaeta
>b) the mouth lies behind an apical acron or prostomium; the anus lies in a terminal pygidium; neither are considered true segments but derive from the anterior & posterior regions of the larvae
errantia- active forms; well developed parapodia & sense organs, many similar segments, eversible pharynx; epitoky common
sedentaria- burrow or tube dwelling; reduced parapodia & sense organs, fixed pharynx; strong tagmatization in some; epitoky rare
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Copyright © 1999 by A. Richard Palmer. All rights reserved.
(revised Jan. 14, 1999)