Calcivertellinae Explained

Calcivertellinae is a subfamily of foraminifera belonging to the order Miliolida.^{[1] [2]} Calcivertellids have been found in Pennsylvanian^[3] to Triassic^[4] beds and had a cosmopolitan distribution.^{[4] [5]}

The calcivertellids are characterized by a porcelain-like test consisting of a single tube, initially forming a spiral but opening out into a zigzag shape. They live attached to a surface or to other organisms.^[6]

Notes and References

1. Book: A. R. . Loeblich . H. . Tappan . 1988 . Foraminiferal genera and their classification . 9781489957603 . 23 February 2022.
2. Kobayashi . Fumio . Middle and late Permian foraminifers from the Chichibu Belt, Takachiho Area, Kyushu, Japan: implications for faunal events . Journal of Paleontology . July 2012 . 86 . 4 . 669–687 . 10.1666/11-049R.1. 130236479 .
3. D.F. . Toomey . 1969 . The Biota of the Pennsylvanian (Virgilian) Leavenworth Limestone, Midcontinent Region Part I: Stratigraphy, Paleogeography, and Sediment Facies Relationships . Journal of Paleontology . 43 . 4 . 1001–1018.
4. Fontaine . Henri . Rodziah . Daud . Singh . Updesh . Discovery of an Upper Triassic limestone basement in the Malay Basin, offshore Peninsular Malaysia: regional implications . Journal of Southeast Asian Earth Sciences . January 1990 . 4 . 3 . 219–232 . 10.1016/S0743-9547(05)80015-7. 1990JAESc...4..219F .
5. J. . Gaillot . D. . Vachard . 2007 . The Khuff Formation (Middle East) and time-equivalents in Turkey and South China: biostratigraphy from Capitanian to Changhsingian times (Permian), new foraminiferal taxa, and palaeogeographical implications . Coloquios de Paleontología . 57 . 37–233 . 23 February 2022.
6. Vachard . Daniel . Krainer . Karl . Small foraminifers of the Upper Carboniferous Auernig Group, Carnic Alps (Austria/Italy) . Rivista italiana di Paleontologia e Stratigrafia . 31 July 2001 . 107 . 2 . 10.13130/2039-4942/5430.