Phylum Foraminifera Order Miliolida Family Hauerinidae | Class Tubothalamea Superfamily Miliolacea Rank Genus | |
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Sigmoilinita is a miliolid genus (Foraminifera) 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
Sigmoilinita Wikipedia(Text) CC BY-SA