Arcoida

Arcoida
Arca zebra shell
Scientific classification
Kingdom: Animalia Phylum: Mollusca Class: Bivalvia Subclass: Pteriomorpha Order: Arcoida
Families
Superfamily Arcoidea Arcidae Cucullaeidae Noetiidae Parallelodontidae Superfamily Limopsoidea Glycymerididae Limopsidae Philobryidae

The Arcoida is an extant order of clams or bivalve molluscs. This order dates back to the lower Ordovician period.

Seven families are currently recognised within the order, including the well-known ark clams or ark shells in family Arcidae.

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