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Yochelcionella : ウィキペディア英語版 | Yochelcionella
''Yochelcionella'' is an extinct genus of basal molluscs which lived during the Tommotian epoch, the first epoch of the Cambrian period. This genus is often reconstructed to resemble snails. ''Yochelcionella'' is the type genus of the family Yochelcionellidae.〔 == Description ==
This genus of molluscs possessed shells which were shaped like curved caps, with an exhaust pipe shaped "snorkel" emanating underneath where the apex (point of the shell) curves over. All experts agree that the "snorkel" was used in breathing, with most experts suspecting that it allowed waste water to flow away from the gills.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Yochelcionella」の詳細全文を読む
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