From Biocrawler, the free encyclopedia.
The Rostroconchia is a class of extinct mollusks dating from the early Cambrian to the late Permian. They were initially thought to be bivalves, but were later given their own class. They typically have a single, pseudobivalved shell enclosing the mantle and muscular foot. The anterior part of the shell probably pointed downward and had a gape from which the foot could probably emerged. Rostroconchs probably lived a sedentary semi-infaunal lifestyle.
 Wikipedia (http://en.wikipedia.org/wiki/Main_Page) Rostroconchia (http://en.wikipedia.org/wiki/Rostroconchia) version history (http://en.wikipedia.org/w/index.php?title=Rostroconchia&action=history) GNU Free Documentation Lizenz (http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License)  CC-by-sa (http://creativecommons.org/licenses/by-sa/2.5/)
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