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

by Paul S. Mikkelsen

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Term Definition

CARINA
(pl. CARINAE)
  A keel-like part; a prominent knife-edged ridge; = KEEL. See illustration: Composite Gastropod. See also: WHORL, CARINATE; WHORL, BICARINATE.
   

CARINATE   Having a CARINA, especially at the periphery of a WHORL; = KEELED.
   

MARGINAL CARINA   Ridge in Trigoniacea (Bivalvia) that runs from UMBO to posteroventral angle of shell and delimits posterior area.
   

PERIPHERY, BICARINATE   Having two CARINA or ridges at the outer edge of a whorl.
   

PERIPHERY, CARINATE   Having one CARINA or ridge at the outer edge of a whorl.
   

WHORL, BICARINATE   Having two CARINA on the PERIPHERY of a whorl.
   

WHORL, CARINATE   Having one or more CARINA on the PERIPHERY of a whorl; see also: WHORL, BICARINATE; WHORL, MONOCARINATE.
   

WHORL, MONOCARINATE   Having a single CARINA on the PERIPHERY of a whorl; see also: WHORL, BICARINATE.
   


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