Discorbacea

Discorbacea.
Temporal range: Middle Triassic–Recent
Scientific classification
(unranked): SAR
(unranked): Rhizaria
Phylum: Granuloreticulosa
Class: Foraminifera
Order: Rotaliida
Superfamily: Discorbacea
Family

see text

Discorbacea, Discorboidea in recent taxonomies, is a superfamily of foraminifera,[1] (testate protists), with a range extending from the Middle Triassic to the present, characterized by chambers arranged in a low trochspiral; an umbilical or interiomarginal aperture, with or without supplementary apertures; and a wall structure that is optically radial.[2][3]

Eight families are currently recognized, further characterized here in.[3]

Two other families were included, the Asterigerinidae and Epistomariidae, which have been removed to the Asterigerinacea. Some now included families such as the Bagginidae were once defined as a subfamily, the Bagginindae, based on the genus Baggina, in the Discorbidae. As a result the discorbid subfamily Discorbine became the present Discorbidae. The Pegidiidae, originally the rotaliitid subfamily Pegidiinae was removed from the Rotaliacea and added to the Discorbacea as a family. Helenina, a genus in the Discorbinae, became the type for its own family, the Heleninidae. Finally the Eponididae was once included in the Orbitoidacea before being made part of the Discorbacea.[2]

References

  1. Loeblich and Tappan,1988. Forminiferal Genera and their Classification
  2. 1 2 Loeblick and Tappan,1964. Sarcodina Chiefly "Thecamoebians" and Foraminiferida; Treatise on Invertebrate Paleontology, part C Protista 2
  3. 1 2 Sen Gupta, 2002. Modern Foraminifera . Pub Springer
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