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Journal of Micropalaeontology An open-access journal of The Micropalaeontological Society
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Volume 10, issue 2
J. Micropalaeontol., 10, 223–226, 1991
https://doi.org/10.1144/jm.10.2.223
© Author(s) 1991. This work is distributed under
the Creative Commons Attribution 4.0 License.
J. Micropalaeontol., 10, 223–226, 1991
https://doi.org/10.1144/jm.10.2.223
© Author(s) 1991. This work is distributed under
the Creative Commons Attribution 4.0 License.

  01 Dec 1991

01 Dec 1991

On Arcacythere Hornibrook, 1952 (Cytheracea, Ostracoda, Crustacea), a senior synonym of Rockallia Whatley, Frame & Whittaker, 1978

M. A. Ayress M. A. Ayress
  • Dept of Geology, The Australian National University, ACT 2601, Australia

Abstract. The type specimens of Arcacythere chapmani Hornibrook, 1952 (the type species of Arcacythere Hornibrook, 1953; Tertiary, New Zealand) have been re-examined and are shown to have internal carapace features identical to those of Rockallia Whatley, Frame & Whittaker, 1978. Rockallia is known from Cenozoic deep-sea sediments worldwide and from the Oligocene and Miocene of northwestern Europe. The external carapace morphologies of Arcacythere and Rockallia show only minor distribution of the fossae. Rockallia is, therefore, shown to be a subjective junior synonym of Arcacythere. An emended diagnosis of A. chapmani is given.

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