Schwagerinidae

Schwagerinidae
Temporal range: Late Carb (M Penn) - Late Permian
Scientific classification
Domain: Eukaryota
(unranked): SAR
(unranked): Rhizaria
Phylum: Retaria
Class: Foraminifera
Order: Fusulinida
Superfamily: Fusulinacea
Family: Schwagerinidae
Dunbar and Henbest, 1930

The Schwagerinidae comprise a family of large, generally fusiform, foraminiferans included in the Fusulinacea, a superfamily of fusulinids, locally abundant during the later Carboniferous (Pennsylvanian) and most of the Permian.

M.L. Thompson (1964) gives the following diagnosis: Shell large, fusiform to irregularly cylindrical, planispiral, involute in most, irregularly uncoiled in some; spirotheca thick, composed of tectum and alveolar kariotheca; septa fluted in end zones of primitive genera, fluted completely across shell and to tops of chambers of more advanced genera; tummel singular in most forms, multiple in one genus; axial fillings absent to massive; chomata massive to slight.

As with all fusulinaceans, the Schagerinidae are a shallow water form which in places make up a significant portion of the sediment, now limestone. More familiar genera include Schwagerina, Triticites, and Parafusulina.

References

    This article is issued from Wikipedia - version of the 11/27/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.