|
An Illustrated and Cross-Referenced Glossary of Malacological and Conchological Terms |
|||
| by Paul S. Mikkelsen | |||
|
|
|
| Term | Definition |
| DEMARCATION LINE | In bivalves, an imaginary line on the surface of valve originating at the BEAK and marking locus of points on successive positions of margin where transverse growth component has had maximum effect; forms dorsoventral profile when VALVE is viewed from one end; see also: CORSELET; DIAGONAL RIDGE; ESCUTCHEON RIDGE. | |
| Copyright ©Paul S. Mikkelsen, All Rights Reserved | Return to Home Page | Return to Top | Over 1700 Terms in the Glossary! |