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Valvulinidae : ウィキペディア英語版 | Valvulinidae
The Valvulinidae is a family of Paleocene to recent benthic textulariid Foraminifera characterized by trochospiral tests in the early stage which may become uniserial in the later. Walls are of cemented agglutinated material and have cavities created by micro-tubules, i.e. are canaliculate. Apertures have a valvular tooth or flap, at least in early stage, but may become multiple and areal in the later stage. Three subfamilies have been defined, the Valvulininae, Siphobigenerininae, and Tritaxilininae. ==References==
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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「Valvulinidae」の詳細全文を読む
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