The Textulariida are an
order of
foraminifera
Foraminifera ( ; Latin for "hole bearers"; informally called "forams") are unicellular organism, single-celled organisms, members of a phylum or class (biology), class of Rhizarian protists characterized by streaming granular Ectoplasm (cell bio ...
that produce agglutinated shells or
tests. An agglutinated test is one made of foreign particles
glued together with an organic or
calcareous cement to form an external shell on the outside of the organism. Commonly, the order had been made up of all species of Foraminifera with these types of shells, but genetic studies indicate these organisms do not form an
evolutionary group, and several superfamilies in the order have been moved to the order
Allogromiida. The remaining forms are sometimes divided into three orders: the Trochamminida and Lituolida, which have organic cement, and the Textulariida ''sensu stricto'', which use a calcareous cement. All three orders or superfamilies are known as fossils from the
Cambrian
The Cambrian ( ) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon. The Cambrian lasted 51.95 million years from the end of the preceding Ediacaran period 538.8 Ma (million years ago) to the beginning of the Ordov ...
onwards.
Taxonomy
If follow scheme of three orders, includes:
*Suborder:
Trochamminina Saidova, 1981
:*Superfamily:
Trochamminoidea Schwager, 1877
::*
Adercotrymidae Brönnimann & Whittaker, 1987
::*
Remaneicidae Loeblich & Tappan, 1964
::*
Trochamminidae Schwager, 1877
References
*
* _____—_____ 1988 :
Classification of the Foraminifera*
*
Foraminifera orders
Extant Cambrian first appearances
Globothalamea
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