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Neithea
''Neithea'' is an extinct genus of bivalve mollusks that lived from the Early Jurassic to the early Paleocene, with a worldwide distribution. ''Neithia'' sp. are inequivalve. That means that the two valves are not the same shape, the right valve being strongly concave and the left valve being flattened or concave. Sculpture consist of alternating strong and weaker radiating ribs. ==References==
* (''Neithea'' ) in the Paleobiology Database * ''Fossils'' (Smithsonian Handbooks) by David Ward (Page 100)
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「Neithea」の詳細全文を読む
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