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Sigmoilinita : ウィキペディア英語版 | Sigmoilinita
''Sigmoilinita'' is a miliolid genus (Foraminifera, Protista) with an ovate to fusuform test that becomes flattened with growth. Chambers are tubular, one-half coil in length, at first added in a sigmoiline (S-shaped) series starting at slightly more than 180° apart. the angle gradually decreasing until the later whorls are planispiral. Chambers are numerous, the wall narrow. imperforate, porcelaneous. The aperture at the end of the final chamber. may have a weakly developed tooth ==References==
* Alfred R. Loeblich Jr and Helen Tappan,1988. Forminiferal Genera and their Classification. E-book ()
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「Sigmoilinita」の詳細全文を読む
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