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Ramonalinidae : ウィキペディア英語版 | Ramonalinidae
Ramonalinidae is an extinct family of marine bivalve mollusks from the late Anisian (early Middle Triassic). It was an edgewise-recliner with a flattened anteroventral surface (on which it rested) and partially fused valves. They formed distinctive mud mounds. ==Taxonomy==
* ''Ramonalina'' is thus far the only known genus.〔
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「Ramonalinidae」の詳細全文を読む
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