Textulariida

Textulariida Temporal range: Cambrian - Recent
File:Textularia.jpg
Textularia shell
Scientific classification
Domain:	Eukaryota
(unranked):	SAR
(unranked):	Rhizaria
Phylum:	Retaria
Subphylum:	Foraminifera
Order:	Textulariida
Superfamilies
Ammodiscacea Astrorhizacea Ataxophragmiacea Hormosinacea Lituolacea Orbitolinacea Textulariacea Trochamminacea

The Textulariida are an order of Foraminifera 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 onwards.

References

Loeblich, A. R. Jr and H. Tappan, 1984. Suprageneric classification of the Foraminiferida (Protozoa). Micropaleontology 30(1):1-70
_____—_____ 1988  : Classification of the Foraminifera
Sen Gupta Barun K. 1992 Systematics of Modern Foraminifera
Treatise on Invertebrate Paleontology Part C Protista 2, 1964 . Geological Society of America and University of Kansas Press. R.C. Moore (ed)