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

by Paul S. Mikkelsen

Look for:  
Search results for:   DISC       7 terms were found.

Term Definition

DISC   The VALVES of bivalves; in Pectinacea, the whole of the valve, excluding the AURICLES; see also: FLANK.

DISCOIDAL   Round and flat, like a disk.; see also: DEPRESSED; LENTICULAR; PLANISPIRAL; SEMIDISCOIDAL. See other gastropod shapes.

DISCONTIGUOUS   Not touching each other, as in the whorls of some gastropods in which the whorls are separated and do not rest upon or touch each other; see: CONTIGUOUS; CONTINUOUS; WHORL, DISJUNCT; GYROCONIC.

DISCONTINUOUS   Interrupted; not continuing intact from one point to another; see: CONTINUOUS.

MARGIN, DISCORDANT   With margins of closed valves not in exact juxtaposition, but one overlapping the other; example: Anadara; see also: INEQUIVALVE.

SEMIDISCOIDAL   Forming half of a circular disk; see also: DISCOIDAL.

WHORL, DISCONTIGUOUS   Having subsequent WHORLS not touching the previous; = WHORL, DISJUNCT; = GYROCONIC.

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