Abstract：
:The structure of the periostracum in the fresh-water mussel Amblema has been described using light microscopy, transmission elec;ron microscopy, and scanning electron microscopy. The structure and evolutive course of the periostracum was studied along its entire length, from the periostracal groove until it forms the tough outer covering of the shell. At least five structurally and functionally distinct regions were identified. In addition, the periostracum itself was seen to be a multilayered structure consisting of three major layers which are themselves subdivided into minor layers. From these morphological observations, a regulatory role for the various periostracal layers in mineral trapping, nucleation, and the subsequent formation of the prismatic and nacreous layers of the shell can be postulated.
journal_name
Tissue Celljournal_title
Tissue & cellauthors
Petit H,Davis WL,Jones Rdoi
10.1016/0040-8166(79)90020-xsubject
Has Abstractpub_date
1979-01-01 00:00:00pages
633-42issue
4eissn
0040-8166issn
1532-3072journal_volume
11pub_type
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