An Illustrated and Cross-Referenced Glossary of Malacological and Conchological Terms |
|||
by Paul S. Mikkelsen |
Term | Definition |
HYPOSTRACUM | (1) Inner layer of shell wall, secreted by entire epithelium of MANTLE (original usage of term); (2) part of shell wall secreted at attachments of ADDUCTOR MUSCLES. | |
MESOSTRACUM | [need definition]; (refers to some aspect of CHITONS) | |
MYOSTRACUM | Part of shell wall secreted at attachments of ADDUCTOR MUSCLES (of bivalves); see also: HYPOSTRACUM. | |
OSTRACUM | Outer part of CALCAREOUS wall of shell, secreted at mantle edge [original usage]; entire calcareous wall of shell [usage by some later authors]; see also: PERIOSTRACUM. | |
PERIOSTRACUM |
The outermost molluscan shell layer, composed of CONCHIOLIN; = DRAP MARIN (by French naturalists); erroneously called "epidermis" by authors; see also: OSTRACUM. Photo: Cymatium pileare (Linne, 1758) |
|
PROTOSTRACUM | Same as PRODISSOCONCH I. | |
Copyright ©Paul S. Mikkelsen, All Rights Reserved | Return to Home Page | Return to Top | Over 1700 Terms in the Glossary! |