Thecosomata

views updated May 21 2018

Thecosomata (shelled pteropods; phylum Mollusca, class Gastropoda) An order of opisthobranch gastropods which have a planktonic mode of life, aided by fins or lobes on the foot. The mantle cavity is large and the shell may be coiled spirally. Individuals are small in size and are ciliary feeders.

sea butterflies

views updated Jun 11 2018

sea butterflies See PTEROPODS.

Pteropoda

views updated May 29 2018

Pteropoda See PTEROPODS.