Title |
An ancient process in a modern mollusc: early development of the shell in Lymnaea stagnalis
|
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Published in |
BMC Developmental Biology, July 2013
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DOI | 10.1186/1471-213x-13-27 |
Pubmed ID | |
Authors |
Jennifer Hohagen, Daniel J Jackson |
Abstract |
The morphological variety displayed by the molluscan shell underlies much of the evolutionary success of this phylum. However, the broad diversity of shell forms, sizes, ornamentations and functions contrasts with a deep conservation of early cell movements associated with the initiation of shell construction. This process begins during early embryogenesis with a thickening of an ectodermal, 'dorsal' (opposite the blastopore) population of cells, which then invaginates into the blastocoel to form the shell gland. The shell gland evaginates to form the shell field, which then expands and further differentiates to eventually become the adult shell-secreting organ commonly known as the mantle. Despite the deep conservation of the early shell forming developmental program across molluscan classes, little is known about the fine-scale cellular or molecular processes that underlie molluscan shell development. |
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