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Journal of Micropalaeontology An open-access journal of The Micropalaeontological Society
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Volume 25, issue 2
J. Micropalaeontol., 25, 153–156, 2006
https://doi.org/10.1144/jm.25.2.153
© Author(s) 2006. This work is distributed under
the Creative Commons Attribution 4.0 License.
J. Micropalaeontol., 25, 153–156, 2006
https://doi.org/10.1144/jm.25.2.153
© Author(s) 2006. This work is distributed under
the Creative Commons Attribution 4.0 License.

  01 Nov 2006

01 Nov 2006

The type material of the Miocene to Recent species Globigerinoides sacculifer (Brady) revisited

Mark Williams1, Daniela N. Schmidt2, Ian P. Wilkinson3, C. Giles Miller4, and Paul D. Taylor4 Mark Williams et al.
  • 1British Antarctic Survey, Geological Sciences Division, High Cross, Madingley Road, Cambridge CB3 0ET, UK (Current address: Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK (e-mail: )
  • 2Department of Earth Sciences, University of Bristol, Queens Road, Bristol BS8 1RJ, UK
  • 3British Geological Survey, Keyworth, Nottingham NG12 5GG, UK
  • 4The Natural History Museum, Department of Palaeontology, Cromwell Road, South Kensington, London SW7 5BD, UK

Keywords: Neogene, planktonic foraminfera, type material, taxonomy, Papua New Guinea

Abstract. The detailed test morphology of the type suite of specimens for the planktonic foraminifer Globigerinoides sacculifer (Brady) is illustrated for the first time since the species was identified in 1877. Fossil representatives of this species are a key index for oceanographic reconstruction of the Neogene and Quaternary tropics. The types of G. sacculifer, sourced from a loose ‘chalk’ block on a beach in New Ireland, Papua New Guinea, all bear a sac-like terminal chamber and are heavily calcified. They have undergone gametogenesis. Scanning electron microscopy identifies calcite fabrics of the test that were formed post-ontogenetically.

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