Fusulinida

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Fusulinida

 

an order of extinct foraminiferans that lived during the Carboniferous and Permian periods. The shell was very large, reaching 6 cm in length. It was lenticular, spherical, or fusiform. There were several imbricate whorls and chambers divided by septa. The wall of the shell was calcareous and consisted of one or two layers. Fusulinida were marine rock-forming organisms (fusulinid limestone). They are of great significance in the stratigraphy of Carboniferous and Permian deposits.

References in periodicals archive ?
2001): Brachiopod and fusulinid assemblages of Kasimovian (Pennsylvanian) age from the Andara Massif (Picos de Europa, northern Spain).
Crinoid, Bivalve, Brachiopod, Fusulinid, Bryozoanal Calcareous Sandstone Facies (MF9): This facies is 3.
Pennsylvanian fusulinids and calcareous algae from Sonora (northwestern Mexico), and their biostratigraphic and palaeobiogeographic implications.
The macrofossils, in particular, fusulinids, crinoids, bryozoans suggest a shallow marine environment for the limestones.
Such provincialism is very strong among all other stratigraphically important Permian fossil groups, especially fusulinids.
The sequence stratigraphic analysis corroborated with fusulinid biostratigraphy and outcrop data suggests that the deposition of the Amb Formation took place in Transgressive-Regressive (T-R) systems tracts.
The poor preservation of the bryozoans and fusulinid foraminifera is attributed to the high continental inux during the deposition of the CHF- 2 facies and indicates a proximal middle shelf depositional setting.
As indicated by its fusulinids (Perez Ramos, 2001), the Paleozoic platform of central and southern Sonora is a large tethysian (gondwanian) unit.
New Method of Orienting Fusulinids for Axial Sectioning.
These outcrops are easily accessible and the Upper Permian is formed by a limestone rich in characteristic fossils: ammonoids, fusulinids and conodonts.