Astrorotalia stellaria Turnovsky is considered a junior synonym of Globorotalia palmerae Cushman and Bermúdez. However, Turnovsky’s genus name Astrorotalia is recognized here to denote the unique development/extension of radially elongate chamber margins into keel-spines. [Berggren et al. 2006]
Catalog entries: Globorotalia palmerae, Globorotalia (Astrorotalia) stellaria
Type images:Distinguishing features:
Parent taxon (Astrorotalia): Low trochospiral test with keel-spines
This taxon: This form is uniquely distinguished by the peripheral keel extending into blade-like keel-spines on each chamber.
Emended description:
Morphology:
Wall type:
Size:
Character matrix
test outline: | Stellate | chamber arrangement: | Trochospiral | edge view: | Planoconvex | aperture: | - |
sp chamber shape: | Subtriangular | coiling axis: | Low | periphery: | Single keel | aperture border: | Thick lip |
umb chbr shape: | Subtriangular | umbilicus: | Wide | periph margin shape: | Subangular | accessory apertures: | None |
spiral sutures: | Moderately depressed | umb depth: | Shallow | wall texture: | Finely muricate | shell porosity: | Macroperforate: >2.5µm |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 5.0-6.0 | N.B. These characters are used for advanced search. N/A - not applicable |
Similar species
Geographic distribution
Aze et al. 2011 summary: Low latitudes; based on Berggren et al. (2006a)
Isotope paleobiology
Aze et al. 2011 ecogroup 1 - Open ocean mixed-layer tropical/subtropical, with symbionts; based on comparison with other species of the genus.
Phylogenetic relations
Most likely ancestor: Planorotalites pseudoscitula - at confidence level 4 (out of 5). Data source: Berggren et al. 2006, f12.1.
Geological Range:
Notes: Restricted to within Zone E7. [Berggren & Pearson 2006]
Last occurrence (top): within E7 zone (45.72-50.20Ma, top in Lutetian stage). Data source: Berggren et al. 2006, f12.1
First occurrence (base): within E7 zone (45.72-50.20Ma, base in Ypresian stage). Data source: Berggren et al. 2006, f12.1
Plot of occurrence data:
Primary source for this page: Berggren et al. 2006 - Eocene Atlas, chap. 12, p. 379
Berggren, W. A. (1968). Phylogenetic and taxonomic problems of some Tertiary planktonic foraminiferal lineages. Tulane Studies in Geology and Paleontology. 6(1): 1-22. gs V O Berggren, W. A. (1977a). Atlas of Palaeogene Planktonic Foraminifera: some Species of the Genera Subbotina, Planorotalites, Morozovella, Acarinina and Truncorotaloides. In, Ramsay, A. T. S. (ed.) Oceanic Micropaleontology. Academic Press, London 205-300. gs 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 V O 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 V O Bermudez, P. J. (1949). Tertiary smaller foraminifera of the Dominican Republic. Cushman Laboratory for Foraminiferal Research, Special Publication. 25: 1-322. gs Bermudez, P. J. (1961). Contribucion al estudio de las Globigerinidea de la region Caribe-Antillana (Paleoceno-Reciente). Editorial Sucre, Caracas. 1119-1393. gs Blow, W. H. (1979). The Cainozoic Globigerinida: A study of the morphology, taxonomy, evolutionary relationships and stratigraphical distribution of some Globigerinida (mainly Globigerinacea). E. J. Brill, Leiden. 2: 1-1413. gs Bolli, H. M. (1957a). Planktonic foraminifera from the Eocene Navet and San Fernando formations of Trinidad. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli, E. & Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin . 215: 155-172. gs V O Cushman, J. A. & Bermudez, P. J. (1937). Further new species of foraminifera from the Eocene of Cuba. Contributions from the Cushman Laboratory for Foraminiferal Research. 13(1): 1-29. gs V O Hillebrandt, A. , von (1976). Los foraminiferos planctonicos, nummulitidos y coccolitoforidos de la zona de Globorotalia palmerae del Cuisiense (Eoceno inferior) en el SE de Espana, (Provincias de Murcia y Alicante. Revista Española de Micropaleontología. 8(3): 323-394. gs O Martinez-Gallego, J. (1973). Sobre la presencia de Globorotalia palmerae Cushman y Bermudéz en las Cordilleras Beticas. Cuadernos de Geologia, Universidad de Granada. 3: 69-75. gs Poore, R. Z. & Bybell, L. M. (1988). Eocene to Miocene biostratigraphy of New Jersey Core ACGS #4: Implications for regional stratigraphy. U.S. Geological Survey Bulletin. 1829: 1-41. gs Schmidt, R. R. & Raju, D. S. N. (1973). Globorotalia palmerae Cushman and Bermúdez and closely related species from the lower Eocene, Cauvery Basin, South India. Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen. B76(167-184): -. gs Stainforth, R. M., Lamb, J. L., Luterbacher, H., Beard, J. H. & Jeffords, R. M. (1975). Cenozoic planktonic foraminiferal zonation and characteristics of index forms. University of Kansas Paleontological Contributions, Articles. 62: 1-425. gs V O Toumarkine, M. & Luterbacher, H. (1985). Paleocene and Eocene planktic foraminifera. In, Bolli, H. M., Saunders, J. B. & Perch-Neilsen, K. (eds) Plankton Stratigraphy. Cambridge Univ. Press, Cambridge 87-154. 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:
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Astrorotalia palmerae compiled by the pforams@mikrotax project team viewed: 7-2-2023
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