Sigmoilinita is a miliolid genus (Foraminifera) with an ovate to fusiform 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.
| Sigmoilinita Temporal range: Miocene - Recent
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| Genus: | Sigmoilinita Seiglie, 1965
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References
edit- Alfred R. Loeblich Jr and Helen Tappan,1988. Forminiferal Genera and their Classification. E-book [1]