An Illustrated and Cross-Referenced Glossary of
Malacological and Conchological Terms
|by Paul S. Mikkelsen|
In gastropods, those teeth of a RADULA which lie immediately to the side (left and right) of the RACHIDIAN or central tooth and more inward from the MARGINAL TOOH (if present). See also: RADULA FORMULA.
In bivalves, those shelly protuberances on the dorsal margins of the shell, and at some distance from the UMBONES. In Bivalves, at or of the hinge area on either side of the cardinal area, well removed from the BEAKS.
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