| Myida | |
|---|---|
 | |
| A live individual of the soft-shelled clam,Mya arenaria | |
Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Infraclass: | Heteroconchia |
| Subterclass: | Euheterodonta |
| Superorder: | Imparidentia |
| Order: | Myida Stoliczka, 1870 |
| Superfamilies and families | |
See text | |
| Synonyms | |
Myoida | |
Myida (formerlyMyoida) is anorder of saltwater and freshwater clams,marine andfreshwaterbivalvemolluscs in the subclassHeterodonta. The order includes such bivalves assoft-shell clams,geoducks andshipworms.
They are burrowing molluscs with well-developedsiphons. The shell is relatively soft and lacks anacreous layer. Some species have a singlecardinal tooth.[1]
Superfamilies and families within the Myida include (the use of † indicate taxa that are extinct):[2]
