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

by Paul S. Mikkelsen

Look for:  
Bivalve Shapes
Grouped by Shape or Type

(or display shapes listed with definitions or in a table, ordered alphabetically)

Triangular Shapes

donaciform

trigonal

subtrigonal

trigonally suboval


Rounded Shapes

orbicular

suborbicular

oval

suboval


Rectangular Shapes Relative Sizes of Paired Valves

quadrate

subquadrate

equivalve

inequivalve


Elongate Shapes

elliptical

subelliptical

elongate elliptical

elongate

fan shaped

mytiliform

nuculaniform

rostrate


Miscellaneous Shapes

cordiform

pectinate

pteriiform

terediniform

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