See More Images
(115 total)
 Dunbarella
© 2003 Spencer Lucas, New Mexico Museum of Natural History
Anadara vanderhoofi
© 2009 Ana Luisa Carreno
 Platyceras
© 1998 Dr. Richard Paselk, Humboldt State University Natural History Museum |
What are Molluscs? One of the largest and most diverse groups, the Mollusca includes the easily recognizable clams, slugs, snails, and squid, as well as less familiar animals such as chitons, tusk shells, and monoplacophorans. The extinct ammonites and belemnites are also molluscs. All molluscs possess a mantle, a sheath of tissue formed from the body wall. Most have a shell made of calcium carbonate that is secreted by the mantle. Molluscs can be found on land, as well as in freshwater and marine environments, from tide pools to the deep ocean trenches. First known fossil occurrence: Cambrian. Last known fossil occurrence: Quaternary. This group has living relatives. Cool Molluscs links: Search for images of Molluscs on Google |
|