Echiurida (spoon worms) A phylum of coelomate (see COELOM), marine, worm-like animals in which mature individuals lack metameric segmentation. The body consists of a sausage-shaped, cylindrical trunk and an anterior, muscular proboscis that cannot be retracted (unlike the introvert of Sipunculida which Echiurida otherwise resemble in size and shape). Parapodia are absent in most forms. All have a pharynx. The nervous system is similar to that of Annelida, but there are no special sense organs. Males and females occur. They are exclusively marine, and most are burrowers and detritus feeders.
More From encyclopedia.com
Nematomorpha , Nematomorpha (hairworms; phylum Aschelminthes) A small class or phylum of pseudocoelomate, unsegmented worms, the vast majority of which are marine.… Whelk , whelk1 / (h)welk/ • n. a predatory marine mollusk (family Buccinidae) with a heavy, pointed spiral shell, some kinds of which are edible. whelk2 • n.… Radiolarians , Radiolaria (superclass Sarcodina, class Actinopodea) A subclass of protozoa which possess more or less elaborate skeletons of silica. The cell body i… West Marine Inc , West Marine, Inc. 500 Westridge Drive Watsonville, California 95076 U.S.A. (408) 728-2700 Fax: (408) 728-2736 Public Company Incorporated: 1993 Emplo… Demosponges , Demospongiae (Demospongea; phylum Porifera) A class of sponges which occur in both marine and freshwater environments. They have a leucon body struct… Marine toad , Bufo marinus (marine toad, cane toad) See BUFONIDAE. marine toad (Bufo marinus) See BUFONIDAE.
About this article
Updated About encyclopedia.com content Print Article
You Might Also Like