The valves of the shell are relatively thin and somewhat elongated. Unlike most other bivalves, species in this group have no hinge teeth on their shells. They have relatively primitive, `protobranchiate`, gills. ==Taxonomy== ...
Found on
http://en.wikipedia.org/wiki/Cryptodonta
(from the article `bivalve`) ...protobranch ctenidia; large labial palps usually with palp proboscides, which effect feeding; foot with flat sole; marine; unattached; ...
Found on
http://www.britannica.com/eb/a-z/c/165
No exact match found.
