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

by Paul S. Mikkelsen

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Term Definition

LIGAMENT, PRIMARY   Part of ligament, of bivalves, representing original condition of structure, consisting of PERIOSTRACUM and lamellar and fibrous layers, but excluding secondary additions, notably FUSION LAYER. See also: LIGAMENT, (types).
   

PRIMARY   Of the first order; most dominant or conspicuous; see also: SECONDARY; TERTIARY; QUARTERNARY.
   

PRIMARY HOMONYM   A name that is identical to another name. The oldest has priority and is termed the senior primary homonym with the younger name being the junior primary homonym. See also: HOMONYM; SECONDARY HOMONYM; HOMONYMY.
   

RIBLET, PRIMARY   On shell with riblets of different orders of strength, the riblet that appears early in ontogeny and remains longer than those appearing later; see also: RIBLET, SECONDARY.
   


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