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An Illustrated and Cross-Referenced Glossary of Malacological and Conchological Terms |
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| by Paul S. Mikkelsen | |||
| Term | Definition |
| ACCESSORY MUSCLE | Any muscle other than ADDUCTOR and PALLIAL muscles, with SCAR of attachment to shell (convenient noncommittal term when referring to scars of muscles of uncertain origin). | |
| ADDUCTOR MUSCLE | One of two muscles connecting bivalve shells, tending to draw them together; these muscles leave diagnostic impressions on the inner surface of the valves; see also: ADDUCTOR SCAR; DIMYARIAN; MONOMYARIAN. | |
| GILL RETRACTOR MUSCLE | Muscle present in a few bivalvia, attaching one of the GILLS to the shell. | |
| MUSCLE SCAR |
An impression on the interior of a shell marking the former place of attachment of a muscle; see also:
ACCESSORY MUSCLE;
DIMYARIAN;
HETEROMYARIAN;
MONOMYARIAN;
CICATRIX. See illustration: Composite Bivalve. See also: MUSCULAR IMPRESSION. See also: Bivalve terminology, Anatomy of bivalves by Marlo Krisberg. |
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| MUSCLE SCAR, ADDUCTOR |
The imprint, on the interior of a bivalve shell, created by the attachment of the ADDUCTOR MUSCLE. See illustration: Composite Bivalve.
See: Bivalve terminology, Anatomy of bivalves by Marlo Krisberg. |
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| MUSCLE SCAR, CRUCIFORM | [need definition]. | |
| MUSCLE SCAR, PEDAL RETRACTOR | The imprint, on the interior of a bivalve shell, created by the attachment of the PEDAL RETRACTOR MUSCLE. See illustration: Composite Bivalve. | |
| PALLIAL RETRACTOR MUSCLE | Muscle withdrawing marginal parts of MANTLE within bivalve shell where there is no distinct line of muscle attachment. | |
| PEDAL ELEVATOR MUSCLE | Thin bundle of muscle fibers attached to a bivalve shell in the umbonal cavity and serving to raise the foot. | |
| PEDAL LEVATOR MUSCLE | Same as PEDAL RETRACTOR MUSCLE. | |
| PEDAL PROTRACTOR MUSCLE | Muscle present in some bivalve genera, attached to shell interior and serving to extend the foot. | |
| PEDAL RETRACTOR MUSCLE | Muscle attached to shell interior, and serving to retract the FOOT (of bivalves); = PEDAL LEVATOR MUSCLE. | |
| QUENSTEDT MUSCLE | Small muscle of unknown function represented by scar below LIGAMENT area in Ostreidae. | |
| RETRACTOR MUSCLE | [need definition]; see also: ADDUCTOR MUSCLE. | |
| SCAR, MUSCLE | See: MUSCLE SCAR. | |
| SIPHONAL RETRACTOR MUSCLE | Muscles serving to withdraw SIPHONS partly or wholly within shell. | |
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