The Fusulinidae is a family of
fusulinacean
foraminifera from the upper
Carboniferous
The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ...
(Lower
Pennsylvanian Pennsylvanian may refer to:
* A person or thing from Pennsylvania
* Pennsylvanian (geology)
The Pennsylvanian ( , also known as Upper Carboniferous or Late Carboniferous) is, in the International Commission on Stratigraphy, ICS geologic timesca ...
, Morrowan) to the Upper
Permian (
Guadalupian), tests of which are fusiform to subcylindrical with walls of two to four layers. Are planispirally coiled throughout or with early whorls at a distinct angle to the later plane of coiling. Septa, flat to well fluted; tunnel, single; chomata variable in development.
Taxonomy
The Fusulinidae is divided into the following subfamilies, ordered as in
Loeblich and
Tappan, 1988.
Fusulinellinae, Staff and Wedekind 1910.
Fusulinidae with flat or slightly fluted septa, wall of three or four layers including diaphanotheca and generally pronounced outer tectorium.
U Carb - U Permian (as for the family)
Fusulininae, Von Möller 1878
Fusulinidae in which the septa are moderately to strongly fluted, wall is composed of 2 to 4 layers including diaphanotheca, the outer tectoria is weakly developed or absent, and chomata or pseudochomata may be present. Upper Carboniferous - Lower Permian (Wolfcamian/Sakmarian)
Eofusulininae, Rauzer-Chernousova & Rosovskaya, 1959.
Early Fusulinidae from the Upper Carboniferous (
Moscovian
Moscovian may refer to:
*An inhabitant of Moscow, the capital of Russia
*Something of, from, or related to Moscow
*Moscovian (Carboniferous)
The Moscovian is in the International Commission on Stratigraphy, ICS geologic timescale a stage (strati ...
), commonly with only three or four whorls, thin and weakly differentiated walls, inconsistent outer tectorium, prominent axial fillings and a possibility of chomata.
Wedekindellininae, F. Kahler & G Kahler, 1966
Middle and Upper Pennsylvanian ( U Carb) Fusulinidae; test fusiform; septa flat with little or no fluting; wall of 3 or 4 layers; chomata prominent.
References
*
* Alfred R. Loeblich Jr and Helen Tappan,1988. Forminiferal Genera and their Classification. Van Nostrand Reinhold. ''see'
Fusulinina-GSI
{{Taxonbar, from=Q5510367
Fusulinida
Foraminifera families
Prehistoric SAR supergroup families