An Illustrated and Cross-Referenced Glossary of
Malacological and Conchological Terms

by Paul S. Mikkelsen

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Term Definition

CARDINAL TOOTH   The main or largest teeth (usually) in a bivalve HINGE, located just below the UMBONES. See illustration: Composite Bivalve. See also: TOOTH, LATERAL.

HINGE TOOTH   Shelly STRUCTURE in bivalves (usually on of a series) adjacent to dorsal margin and received in socket in opposite VALVE; hinge teeth serve to hold valves in position when closed.

INSERTION TEETH   Articulating processes that unite the valves of a chiton to the GIRDLE or INSERTION PLATES.

  A ribbon which supports rows of chitinous teeth; this characteristic is found only in molluscs; see also: ASCUS SAC; CUSPIDOBLAST; ODONTOPHORE; RADULA FORMULA; UNISERIATE.

Mikkelsen, P.S. 1985. A rapid method for slide mounting of minute radulae, with a bibliography of radula mounting techniques. Nautilus 99(2-3):62-65. [request a reprint! or download a copy]

TEETH   In bivalves, the shelly protuberances on the dorsal margin of a VALVE which fit into corresponding sockets of the opposite valve.

In gastropods, the RADULA.

In cephalopods, see: BEAK.

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