Daughter taxa (time control age-window is: 0-800Ma) | ||||
Astrorotalia palmerae This form is uniquely distinguished by the peripheral keel extending into blade-like keel-spines on each chamber. | ||||
Astrorotalia sp. Specimens which cannot be assigned to established species |
Catalog entries: Astrorotalia
Distinguishing features:
Parent taxon (Truncorotaloididae): Muricate
This taxon: Low trochospiral test with keel-spines
Most likely ancestor: Planorotalites - at confidence level 0 (out of 5). Data source: Berggren et al. 2006.
Geological Range:
Last occurrence (top): at top of E7 zone (100% up, 45.7Ma, in Lutetian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within E7 zone (45.72-50.20Ma, base in Ypresian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Primary source for this page: Berggren et al. 2006 - Eocene Atlas, chap. 12, p. 379
Berggren, W. A., Olsson, R. K. & Premoli Silva, I. (2006a). Taxonomy, biostratigraphy and phylogenetic affinities of Eocene Astrorotalia, Igorina, Planorotalites, and Problematica (Praemurica? lozanoi). In, Pearson, P. N., Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 41(Chap 12): 377-400. gs Bermudez, P. J. (1937b). Nuevas especies de Foraminiferos del Eoceno de Cuba. Memorias de la Sociedad Cubana de Historia Natural “Felipe Poey”. 11: 137-150. gs Turnovsky, K. (1958). Eine neue Art von Globorotalia Cushman aus dem Eozaen Anatoliens und ihre Zuordnung su einer neuen Untergattung. Bulletin of the Geological Society of Turkey. 6(2): 80-86. gsReferences:
Astrorotalia compiled by the pforams@mikrotax project team viewed: 5-10-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=100035 Go to Archive.is to create a permanent copy of this page - citation notes |