Rotaliida

The sessile foraminifer Miniacina miniacea, ( Homotrematidae ) in the Mediterranean Sea on the coast of Tuscany

The Rotaliida are an order bearing housing, meeresbewohnender protozoa from the group of foraminifera.

Features

The species of the order secrete their housing from the low -magnesium calcite (< 5 mol% of magnesium), the wall is bilamellar. The housings are perforat with either low or high trochospiraler rare, planispiraler, of annular or irregular arrangement of the chambers.

In addition to the Miliolida and Globigerinida the Rotaliida are one of three foraminiferal orders that serve as hosts for photosynthesizing endosymbionts. Such symbioses are found in the families Amphisteginidae, Calcarinidae and Nummulitidae as well as occasional representatives of other families, eg the Asterigerinidae. The endosymbionts are usually to diatoms.

System

The order consists of eleven superfamilies:

• Superfamily Nummulitacea Family Nummulitidae

• Family Bagginidae
• Family Eponididae
• Family Heleninidae
• Family Mississippinidae
• Family Pegidiidae
• Family Discorbidae
• Family Rosalinidae
• Family Sphaeroidinidae

• Family Glabratellidae
• Family Heronallenidae

• Family Siphoninidae

• Family Discorbinellidae
• Family Pseudoparrellidae

• Family Planulinidae
• Family Cibicididae
• Family Planorbulinidae
• Family Cymbaloporidae

• Family Acervulinidae
• Family Homotrematidae

• Family Asterigerinidae
• Family Amphisteginidae
• Family Epistomariidae

• Family Nonionidae

• Family Chilostomellidae
• Family Quadrimorphinidae
• Family Osangulariidae
• Family Oridorsalidae
• Family Gavelinellidae
• Family Karreriidae

• Family Rotaliidae
• Family Calcarinidae
• Family Elphidiidae

Evidence

• Barun K. Sen Gupta: Systematics of modern Foraminifera, In: Barun K. Sen Gupta (ed. ): Modern Foraminifera. Springer Netherlands ( Kluwer Academic ), 2002, ISBN 978-1-4020-0598-5, p 28