Show Summary Details

Quick Reference

(class Gastropoda, subclass Prosobranchia)

An order of gastropods that first appeared in the Early Cambrian and that includes the extant Patella vulgata (limpet). Gastropods may be subdivided according to their respiratory structures; archaeogastropods, the most primitive members of the class, have just two gills, one of which may be reduced or absent, and some forms have a marginal slit near the aperture through which water and wastes are removed.

Subjects: Earth Sciences and Geography — Zoology and Animal Sciences.

Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.