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

by Paul S. Mikkelsen

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Term Definition

QUADRATE   Square or rectangular in general outline; applied to the outline of shells which is formed by nearly straight lines meeting at approximately right angles; see also: HEXAGONAL; POLYGONAL; OCTOGONAL; RHOMBOID; SUBQUADRATE; TRAPEZIFORM; TRAPEZOIDAL.
See other bivalve shapes.
Photo: Mysella sp. undet.

SUBQUADRATE   Not quite QUADRATE, but nearly so; see also: SUBELLIPTICAL.
See other bivalve shapes.

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