home   Printer friendly version Add to site
Advanced search
Time & Space Fossil Gallery Famous Flora & Fauna
Careers Resources K-12 Collections PaleoPeople

Bivalves

See More Images
(41 total)

Buchia acutistriata
Buchia acutistriata
© 1998 Dr. Richard Paselk, Humboldt State University Natural History Museum

Argopecten revellei
Argopecten revellei
© 2009 Ana Luisa Carreno

Pecten byramensis
Pecten byramensis
© 2005 George E. Phillips, Mississippi Museum of Natural Science

What are Bivalves? Bivalves are molluscs with a shell made of two interlocking pieces (valves) made of calcium carbonate. They can be found in many different freshwater and marine environments, such as lakes, tide pools, reefs, and hydrothermal vents. Some bivalves attach themselves to hard surfaces (oysters, mussels), a few species can swim (scallops), but most bury or anchor themselves into soft sediment. Partly because they have a hard shell, and partly because they are so numerous, the fossil record of bivalves is fairly good and extends back to the Cambrian.

First known fossil occurrence: Cambrian.

Last known fossil occurrence: Quaternary. This group has living relatives.

Cool Bivalves links:

Search for images of Bivalves on Google

help