Systellomatophora

Systellomatophora

[¦sis·tə·lō·mə′täf·ə·rə]
(invertebrate zoology)
An order of the subclass Pulmonata in which the eyes are contractile but stalks are not retractile, the body is sluglike, oval, or lengthened, and the lung is posterior.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.