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

by Paul S. Mikkelsen

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Term Definition

OPISTHOCLINE   Sloping (from lower end) in posterior direction [term applied to HINGE TEETH of bivalves and, in some genera, to body of shell]; opposite of PROSOCLINE.

See photos on the "Let's Talk Seashells" website: Tricky terminology, prosocline and opisthocline.

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