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An Illustrated and Cross-Referenced Glossary of Malacological and Conchological Terms |
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| by Paul S. Mikkelsen | |||
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| Term | Definition |
| POSTERIOR | Toward the apical end of, in coiled gastropod shells, or the siphonal end of, in bivalves; opposite of ANTERIOR; see also: OPISTHODETIC; for bivalves, see also: MARGINAL CARINA; CORSELET. | |
| POSTERIOR CANAL | = ANAL SULCUS; = ANAL CANAL. See illustration: Composite Gastropod. See also: ANTERIOR CANAL. | |
| POSTERIOR LATERAL TOOTH | LATERAL TOOTH situated posteriorly to beaks and (in heterodonts) posterior to the LIGAMENT. | |
| POSTERIOR RIDGE | A ridge, in bivalves, passing over or originating near the umbo and running diagonally towards the posteroventral part of the valve; see also: CORSELET. | |
| POSTERIOR SLOPE | Sector of surface of valve (of bivalves) running posteroventrally from UMBO; see also: CORSELET. | |
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