Globothalamea

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|Classification of Foraminifera|


Class Globothalamea Pawlowski, Holzmann & Tyszka 2013

Diagnosis: Test multi-chambered, typically trochospirally enrolled but may be triserial, biserial or uniserial; chambers globular or crescent-shaped in early stage; wall agglutinated or calcareous.

Molecular characteristics: SSU rRNA gene length averaging 3500 nt (3000–4000 nt) and GC content of about 40%; a conserved motive in the variable region 41f of the SSU rDNA (Pawlowski and Lecroq 2010).

Stratigraphic range: Lower Cambrian – Recent.

Wall of low magnesium calcite, optically radial, bilamellar, perforate; some with internal canal system; possibly include all or most of planktonic globigerinids.

Wall of hyaline, perforate, optical radial aragonite; chambers with internal partitions in modern taxa.

Wall agglutinated, with foreign particles attached to organic lining or cemented by low magnesium calcite; possibly paraphyletic group.

The term "Textulariida" is here used only partially in the sense of the definition given by Loeblich & Tappan (1988), and includes the most of the Lituolida, the Loftusiida, and the Textularida (sensu stricto), of Kaminski (2004).

  • Order Carterinida Loeblich and Tappan, 1981

Wall composed of rodlike spicules of low magnesium calcite held in organic lining; chambers numerous, trochospirally coiled.