Animal Diversity Web

Enter one or more keywords. Use quotes to search for a phrase (e.g., wombats or "gray wolves"). More tips in the Search Guide .

062.rjb1

Gyraulus.The Planorbidae is a freshwater snail family of the subclass Pulmonata. These snails, although aquatic, are lung breathers. Gills are lacking; instead there is a large pulmonary sac for gaseous exchange. In the snail shown here, nearly half of the last whorl is occupied by the lung, clearly visible as an air-filled space. The Planorbidae are coiled in one plane, i.e., they are planate, a characteristic from which the family name is derived.

About this image

Identification: Gyraulus
Contributors: John B. Burch, University of Michigan-Ann Arbor
photographer copyright holder
Subjects: Subject Live Animal; Type Photo; Life Stages and Gender adult/sexually mature

Conditions of use

This resource may not be downloaded and used without permission of the copyright holder except for educational fair use.

To cite this page: Burch, J. 2004. "062.rjb1.jpg" (On-line), Animal Diversity Web. Accessed {%B %d, %Y} at https://animaldiversity.org/collections/contributors/jack_burch/062.rjb1/

Last updated: 2004-52-01 / Generated: 2025-09-15 01:58