Discorbacea

rdf:langString Discorbacea

rdf:langString Discorbacea

rdf:langString Discorbacea

rdf:langString Ehrenberg, 1838

rdf:langString see text

rdf:langString Family

rdf:langString Discorbacea

rdf:langString Discorbacea, Discorboidea in recent taxonomies, is a superfamily of foraminifera, (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. Eight families are currently recognized, further characterized here in. * – Discorbacea in which each chamber is partly divided by an imperforate wall and the umbilical area partly is covered by chamber extensions. Discorbis, * – Discorbacea with an overall finely perforate test, but imperforate in a part of ventral side Baggina, * – in which the aperture is interiomarginal and slitlike (or a narrow arch) or areal and cribrate. , , , * – in which the primary aperture is interiomarginal and secondary apertures are sutural * – have distinct, translucent or opaque bands near the periphery on one or both sides; , * – in which coiling is a modified trochospiral, with resorbed early chambers and apertures are open ends of tubes on the ventral side * – have simple chamber interiors, an umbilicus partly covered by chamber extensions or closed, and an aperture that is a low interiomarginal arch. , , Rosalina * – Discorbacea with strongly overlapping chambers, arranged trochospirally or in different planes; and single slitlike or multiple apertures. Two other families were included, the and , 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 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 before being made part of the Discorbacea.