Myida
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Template:Short description Template:Automatic taxobox
Myida (formerly Myoida) is an order of saltwater and freshwater clams, marine and freshwater bivalve molluscs in the subclass Heterodonta. The order includes such bivalves as soft-shell clams, geoducks and shipworms.
Description
They are burrowing molluscs with well-developed siphons. The shell is relatively soft and lacks a nacreous layer. Some species have a single cardinal tooth.[1]
Superfamilies and families
Superfamilies and families within the Myida include (the use of † indicate taxa that are extinct):[2]
- Superfamily: Dreissenoidea
- Family: Dreissenidae
- Superfamily: Myoidea
- Family: Corbulidae
- Family: Myidae
- Family: †Pleurodesmatidae
- Family: †Raetomyidae
- Superfamily: Pholadoidea
- Family: Pholadidae
- Family: Teredinidae
- Family: Xylophagaidae
- Superfamily: †Pleuromyoidea
- Family: †Ceratomyidae
- Family: †Pleuromyidae
- Family: †Vacunellidae
References
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- Powell A W B, New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 Template:ISBN