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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 |
| EXTRAPALLIAL FLUID | That fluid between MANTLE and the PERIOSTRACUM, which is rich in CaCO3 in solution, which precipitates out, forming the shell. | |
| PALLIAL | Pertaining to the MANTLE, or the region of the GILLS. | |
| PALLIAL CAVITY | [need definition]. | |
| PALLIAL LINE |
On the inside of some bivalve shells, a linear scar marking the attachment of the margin of the fleshy MANTLE to the shell. See illustration: Composite Bivalve. See also: INTEGROPALLIATE; MUSCULAR IMPRESSION; SINUPALLIATE.
See: Bivalve terminology, Anatomy of bivalves by Marlo Krisberg. |
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| PALLIAL REGION | Marginal region of shell interior adjacent to PALLIAL LINE. | |
| PALLIAL RETRACTOR MUSCLE | Muscle withdrawing marginal parts of MANTLE within bivalve shell where there is no distinct line of muscle attachment. | |
| PALLIAL SINUS |
A notch or EMBAYMENT in the PALLIAL LINE caused by the attachment of the siphon's retractile muscles. It may be deep, shallow, or absent... depending on the species. See illustration: Composite Bivalve. See also: INTEGROPALLIATE; SINUPALLIATE.
See: Bivalve terminology, Anatomy of bivalves by Marlo Krisberg. |
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| TENTACLE, PALLIAL | A tentacle, in rissoids and some other MESOGASTROPODS, growing from the edge of the mantle skirt on the right side and occasionally also on the left. In turritellids, a whole series of pallial tentacles lies around the entrance to the MANTLE CAVITY. | |
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