Pleurocoelea

Pleurocoelea

[‚plu̇r·ə′sē·lē·ə]
(invertebrate zoology)
An extinct superfamily of gastropod mollusks of the order Opisthobranchia in which the shell, mantle cavity, and gills were present.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.