Globothalamea

Globothalamea
Temporal range: Devonian? - Recent
Ammonia beccarii
Ammonia beccarii
Scientific classification
Clade: SAR
(unranked): Rhizaria
Superphylum: Retaria
Phylum: Foraminifera
Class: Globothalamea
Pawlowski, Holzmann, & Tyszka, 2013
Orders

Globothalamea[1] comprises a class of multichambered foraminifera based in part on SSU rDNA evidence;[2] the other is Tubothalamea.

Six orders are included, which vary notably in composition, wall structure, and chamber arrangement. The Lituolida, Loftusiida, and Textulariida (as emended) have tests (shells) of agglutinated matter, glued together by various cements, but differ in chamber arrangement, wall structure, and complexity. In contrast the Carterinida, Robertinida and Rotaliida, with buliminids lumped into the Rotaliida, have calcareous tests. Those of rotaliid genera, which vary considerably, are of perforate hyaline (glassy) calcite. in contrast the Carterinida have tests composed of bundled calcite spicules. The Robertida differ in being composed, instead, of aragonite.[3]

Subclass Textulariia

Unassigned

References

  1. ↑ World Foraminifera Database, Foraminifera
  2. ↑ Pawlowski, Jan; Holzmann, Maria; Tyszka, Jarosław (2013). "New supraordinal classification of Foraminifera: Molecules meet morphology". Marine Micropaleontology. 100: 1–10. doi:10.1016/j.marmicro.2013.04.002.
  3. ↑ Foraminifera genera and their description Archived 2015-11-27 at the Wayback Machine A.R. Loeblich jr & H. Tappan, 1988. e-book.
This article is issued from Offline. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.