Sigmoilinita

Sigmoilinita; Temporal range: Miocene - Recent
Scientific classification
(unranked):	SAR
(unranked):	Rhizaria
Phylum:	Foraminifera
Class:	Tubothalamea
Order:	Miliolida
Superfamily:	Miliolacea
Family:	Hauerinidae
Genus:	Sigmoilinita; Seiglie, 1965

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.

References

Alfred R. Loeblich Jr and Helen Tappan,1988. Forminiferal Genera and their Classification. E-book

This article is issued from Wmcloud. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.