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Journal of Micropalaeontology An open-access journal of The Micropalaeontological Society
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Volume 17, issue 1
J. Micropalaeontol., 17, 71-85, 1998
https://doi.org/10.1144/jm.17.1.71
© Author(s) 1998. This work is distributed under
the Creative Commons Attribution 4.0 License.
J. Micropalaeontol., 17, 71-85, 1998
https://doi.org/10.1144/jm.17.1.71
© Author(s) 1998. This work is distributed under
the Creative Commons Attribution 4.0 License.

  01 Apr 1998

01 Apr 1998

Late Miocene calcareous nannofossil genus Catinaster: taxonomy, evolution and magnetobiochronology

Alyssa Peleo-Alampay1, David Bukry2, Li Liu3, and Jeremy R. Young4 Alyssa Peleo-Alampay et al.
  • 1Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093–0208, USA; now at National Institute of Geological Sciences, University of the Philippines, Diliman, Quezon City, Philippines 110
  • 2U.S. Geological Survey, Paleontology and Stratigraphy Branch, 345 Middlefield Road, MS 915, Menlo Park, CA 94025, USA; now at Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093–0231, USA
  • 3Department of Geology, Florida State University, Tallahassee, FL 32306, USA
  • 4Palaeontology Department, The Natural History Museum, London, SW7 5BD, UK

Abstract. A systematic study on the evolution and stratigraphic distribution of the species of Catinaster from several DSDP/ODP sites with magnetostratigraphic records is presented. The evolution of Catinaster from Discoaster is established by documentation of a transitional nannofossil species, Discoaster transitus. Two new subspecies, Catinaster coalitus extensus and Catinaster calyculus rectus are defined which appear to be intermediates in the evolution of Catinaster coalitus coalitus to Catinaster calyculus calyculus. The first occurrence of C. coalitus is shown to be in the lower part of C5n.2n at 10.7–10.9 Ma in the low to mid–latitude Atlantic and Pacific Oceans. The last occurrence of C. coalitus coalitus varies from the upper part of C5n.2n to the lower portion of C4A. Magnetobiostratigraphic evidence suggests that the FO of C. calyculus rectus is diachronous. Catinaster mexicanus occurs in the late Miocene and has been found only in the eastern equatorial Pacific, the Indian Ocean and the Gulf of Mexico.

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