pforams@mikrotax - Rotalipora pforams@mikrotax - Rotalipora


Classification: pf_mesozoic -> Rotaliporidae -> Rotalipora
Sister taxa: Anaticinella, Biticinella, Pseudothalmanninella, Rotalipora, Thalmanninella, Ticinella
Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa
Rotalipora cushmani

Rotalipora cushmani var. evoluta

Rotalipora montsalvensis

Rotalipora praemontsalvensis

Rotalipora sp.
Specimens which cannot be assigned to established species


Citation: Rotalipora Brotzen 1942
taxonomic rank: Genus
Type species: Rotalipora turonica Brotzen, 1942 = Globorotalia cushmani Morrow, 1934

Original description: Linsenförmige turbospirale Schalen. Kammern auf Nabel und Spiralseite stark gewolbt. Spiralseite mit mehreren getrennten Umgangen, Nabelseite mit grossem, weitem Nabel, der unter einer Decke versteckt liegt. Die Decke ist entstanden durch Zusammenschmelzen der Lippen iiber den Umbilicalmiindungen. Der periphare Rand der Schale ist meist mit einem leistenartigen Saum versehen. Die Miindung ist gross und besteht aus einem interiomarginalen Teil, der zu dem umbilikalen direkt iibergeht. Der umbilikale Teil der Miindung liegt unter der Decke, die den Nabel bedeckt. In den Suturen bleibt noch ein Miindungsloch, das nach hinten gerichtet ist, erhalten. Schalen meist rauh.

Familiengruppe Rotaliiformes, Familie Valvulineriidae, Unterfamilie Globotruncaninae.

Entries in the Catalog of original descriptions: Rotalipora

Distinguishing features:
Parent taxon (Rotaliporidae): Test trochospirally enrolled, primary aperture umbilical-extraumbilical in position and with bordering lip, secondary sutural apertures on umbilical side open into posterior edge of chambers.
This taxon: Test trochospiral, biconvex to planoconvex, umbilicate, chambers angular to rhomboid in edge view, sutures elevated, curved, oblique on the spiral side, depressed to flush, straight to curved and radial on the umbilical side, periphery angular with a single keel, peripheral outline entire to lobulate; wall calcareous, finely and densely perforate, optically radial, surface smooth to pustulose, sutures may be thickened to beaded; aperture interiomarginal, extraumbilical-umbilical, bordered by a narrow to wide imperforate lip, accessory apertures along the sutural margin formed by an umbilical flaplike extension from the chamber and bordered by a narrow imperforate lip.

Geological Range:
Last occurrence (top): at top of R. cushmani zone (100% up, 94Ma, in Cenomanian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within T. globotruncanoides zone (98.85-100.50Ma, base in Cenomanian stage). Data source: Total of ranges of species in this database

Plot of range and occurrence data:


Loeblich, A. R. & Tappan, H. (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York. 1-1059. gs


Rotalipora compiled by the pforams@mikrotax project team viewed: 13-7-2024

Taxon Search:
Advanced Search

Short stable page link: Go to to create a permanent copy of this page - citation notes

Add Comment

* Required information
Captcha Image
Powered by Commentics


No comments yet. Be the first!