Shape conservatism and shaping variability. The comparative analysis of Hydrozoa and Scyphozoa early development

The morphogenetic pathways based on the self-organization take an important part in the early development of White Sea Cnidarians--Dynamena pumila (Hydrozoa) and Aurelia aurita (Scyphozoa). Comparative analysis of their early development revealed two patterns of embryonic spatial structure reproduce...

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Bibliographic Details
Published in:	Žurnal obŝej biologii Vol. 63; no. 4; p. 326
Main Author:	Kraus, Iu A
Format:	Journal Article
Language:	Russian
Published:	Russia (Federation) 01-07-2002
Subjects:	Animals Hydrozoa - embryology Hydrozoa - growth & development Hydrozoa - ultrastructure Microscopy, Electron, Scanning Morphogenesis Oceans and Seas Scyphozoa - embryology Scyphozoa - growth & development Scyphozoa - ultrastructure
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Summary:	The morphogenetic pathways based on the self-organization take an important part in the early development of White Sea Cnidarians--Dynamena pumila (Hydrozoa) and Aurelia aurita (Scyphozoa). Comparative analysis of their early development revealed two patterns of embryonic spatial structure reproduced in the morphogenesis of both species in spite of the differences of morphogenetic paths. These are toroidal and bilaterally symmetrical shapes. It is possible that these shapes correspond to the equilibrium states of developing system and their stable reproduction is a result of epigenetic rather than genetic program.
ISSN:	0044-4596