Nuculanoida | |
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Shells of Acila cobboldiae family Nuculidae |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Bivalvia |
Subclass: | Protobranchia |
Order: | Nuculanoida |
Families | |
See text. |
Nuculanoida is an order of bivalves. It belongs to the subclass Protobranchia. They are distinguished from other bivalves by the presence of relatively primitive, "protobranchiate" gills, with a row of short teeth along the hinge of the shell. The shells are often nacreous.[1]