貝形虫類の背甲 : 構造とクチクラ形成に関する総説【化石販売の化石セブン】

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●タイトル

貝形虫類の背甲 : 構造とクチクラ形成に関する総説

●英語タイトル

Review of studies on structure and cuticle formation of ostracod carapace

●著者

山田 晋之介

●抄録

Ostracod carapaces are thought to be exceptional materials for understanding on evolution of exoskeleton in arthropods practically, because they are preserved as fossils and have anatomically important features. Nevertheless, more histological understandings of carapace are necessary to exert the high potential subsisting in the carapace features and to understand the evolution of Ostracoda profoundly. This paper reviews recent knowledge on the structure and cuticle formation of ostracod carapace from the point of histological view. Previous papers on carapace structure have been carried out from the two points of views. One is the biological view to clarify the carapace structure anatomically and the other is the paleontological view to elucidate mainly the structure of hard tissues preserved as fossils. Most of them, however, only focused on descriptions on the microstructures of hard parts. Though ultrastructural studies on the carapace comprising "dead tissues" and "living tissues" should be carried out by means of both SEM and TEM, the number of species treated in these studies is very small. The comprehensive elucidation of carapace structure containing the hard and soft tissues will be able to reanimate the "dead tissues" of carapace as a part of active animal body.

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