Taxon Description (Wikipedia)
| image = Haeckel Acephala.jpg
| image_width = 250px
| image_caption = "Acephala", from Ernst Haeckel's
Kunstformen der Natur (1904)
| regnum = Animalia
| phylum = Mollusca
| classis =
Bivalvia
| classis_authority = Linnaeus, 1758
| subdivision_ranks = Subclasses
| subdivision =
Anomalosdesmata
Cryptodonta
Heterodonta
Paleoheterodonta
Palaeotaxodonta
Pteriomorphia
see text
}}
Bivalves are marine and freshwater molluscs belonging to the class
Bivalvia. Other names for the class include
Acephala,
Bivalva,
Pelecypoda, and
Lamellibranchia. The class contains 30,000 species, including scallops, clams, oysters and mussels.
Bivalves have a shell consisting of two rounded plates called...
full article at Wikipedia
