BRYOZOANS, PHORONOIDS, LAMP SHELLS LOPHOPORATES BRYOZOANS, PHORONOIDS, LAMP SHELLS

LOPHOPHORATE CHARACTERISTICS 3 groups Have a unique feeding structure called the lophophorate which is a set of ciliated tentacles arranged in a horseshoe shape Suspension feeders No segmentation Bilateral symmetry U-shaped gut

BRYOZOANS- form colonies on seaweeds, rocks and other species 4500 species; almost all marine In phylum Ectoprocta Colonies of individuals called ZOOIDS that secrete skeletons of various shapes Lopophore is retractable U-shaped gut ends in an anus outside the edge of the lophophore

PHORONOIDS-worm-like and build tubes Horseshoe-shaped or circular lophopore 20 species Burrow in sand or attach tubes to hard surfaces Very small

LAMP SHELLS OR BRACHIOPODS 350 SPECIES Shell w/2 valves that are dorsal and ventral to the body Have a lophophore- w/2 ciliated and coiled arms Attached to rocks or burrowed in soft sediment

ARROW WORMS CHAETOGNATHS

Characteristics of Arrow worms About 100 species Transparent; streamlined; fish-like fins and tail Head has eyes, grasping spines and teeth Up to 4” carnivores

Arrow worm