Planorbulinoidea

Planorbulinoidea is a superfamily of rotalliid foraminifera that has been extant since the Early Cretaceous (Berriasian), characterized by trochospiral tests, at least in early stage but which later may become uncoiled. The test wall is of perforate hyaline calcite, commonly optically radial in structure, with crystallographic c-axes perpendicular to the surface. The apertural face may be imperforate; the aperture interiomarginal and extraumbilical-umbilical to nearly equatorial in coiled forms, subterminal in uncoiled forms.

Planorbulinoidea Temporal range: Early Cretaceous - recent
Planulina limbata
Scientific classification
Domain:	Eukaryota
Clade:	Sar
Clade:	Rhizaria
Phylum:	Retaria
Subphylum:	Foraminifera
Class:	Globothalamea
Order:	Rotaliida
Superfamily:	Planorbulinoidea Schwager, 1877
Families[1]
Bisacciidae Cibicididae Cymbaloporidae Louisianinidae Planorbulinidae Planulinidae Victoriellidae
Synonyms[1]
Planorbulinacea Schwager, 1877

The Planorbulinoidea unite six families which are distinguished primarily by their morphological differences.