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

by Paul S. Mikkelsen

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Term Definition

BYSSAL SINUS   Embayment of margin below anterior auricle of left valve in many Pectinacea, corresponding to byssal notch of right valve but usually shallower; see also: BYSSAL FORAMEN; BYSSAL GAPE; BYSSAL NOTCH.

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