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

by Paul S. Mikkelsen

Look for:  
Search results for:   SINISTRAL       1 term was found.

Term Definition

SINISTRAL   In gastropods, the direction of coiling in which, with the shell held upright (apex at the top), the APERTURAL opening is at the left; and in which, with the shell viewed from above the APEX, the coiling proceeds from the apex in a counterclockwise direction; = LEFT HANDED; opposite of DEXTRAL; See also: ACHIRAL; CHIRALITY; HETEROSTROPHY; ENANTIOMORPH;.
See other gastropod shapes.
Illustration: Physella sp.; Photo: Busycon contrarium (Conrad, 1840)
See: Sinistral Shells - by design or accident

Copyright ©Paul S. Mikkelsen, All Rights Reserved Return to Home Page  |  Return to Top Over 1700 Terms in the Glossary!