hinge teeth
From ZooTerms (Dictionary of Invertebrate Zoology)
hinge teeth: 1. (Brachiopoda) The tooth part of the articulating device on the ventral valve in the form of small projections along the free edge of the palintrope.
2. (Mollusca: Bivalvia) A series of shelly structures near the dorsal margin and fitting into a socket in the opposite valve; functioning in holding valves in position when closed.
