Nuculanida
# Nuculanida

Nuculanida is an order of very small saltwater clams, marine bivalve molluscs in the subclass Protobranchia.

## Description

These bivalves are distinguished by the presence of relatively primitive, "protobranchiate" gills. There are a row of short teeth along the hinge of the shell. The shells are often internally nacreous.

## Families

Families within the order Nuculanida include:

* Bathyspinulidae Coan & Scott, 1997
* Lametilidae
* Malletiidae H. and A. Adams, 1858
* Neilonellidae Schileyko, 1989
* Nuculanidae H. Adams & A. Adams, 1858
* Sareptidae Stoliczka, 1871
* Siliculidae Allen and Sanders, 1973
* Tindariidae Verrill and Bush, 1897
* Yoldiidae Habe, 1977
* Praenuculidae Mcalester, 1969 (?)
* Pristiglomidae Sanders and Allen, 1973 (?)
