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Brissus bridgeboroensis, a new spatangoid echinoid from the lower Oligocene of southwestern Georgia

  • Burchard D. Carter (a1)

Abstract

A new species of Brissus is described from the lower Oligocene (Rupelian–Vicksburgian) Bridgeboro limestone of southwestern Georgia. Brissus bridgeboroensis n. sp. most closely resembles the Recent Brissus unicolor (Leske) of the West Indies and the Gulf of Mexico, but it differs primarily in features of the posterior paired petals. Brissus bridgeboroensis is the oldest known member of the genus from continental North America.

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Cooke, C. W. 1959. Cenozoic echinoids of eastern United States. United States Geological Survey Professional Paper 321, 106 p.
Grant, U. S. IV, and Hertlein, L. G. 1938. The west American Cenozoic Echinoidea. University of California at Los Angeles Publications in Math and Physical Sciences 2, 225 p.
Huddleston, P. F. 1981. Correlation chart—Georgia Coastal Plain. Georgia Geological Survey Open-File Report 82–1.
Kier, P. M. 1984. Fossil spatangoid echinoids of Cuba. Smithsonian Contributions to Paleobiology 55, 336 p.
Kier, P. M. and Grant, R. E. 1965. Echinoid distribution and habits, Key Largo Coral Reef Preserve, Florida. Smithsonian Miscellaneous Collections 149, 6, 68 p.
Manker, J. P., and Carter, B. D. 1985. Lower Oligocene algal nodules (rhodolites) from south Georgia and north Florida as paleoenvironmental and paleogeographic indicators. Geological Society of America, Abstracts with Programs, 17(2):121.
Manker, J. P., and Carter, B. D. In review. Paleoecology and paleogeography of an extensive rhodolith facies from the lower Oligocene of south Georgia and north Florida. Palaios.
Mortensen, T. H. 1951. A Monograph of the Echinoidea: V, Pt. 2, Spatangoida 2. C. A. Reitzel, Copenhagen, 593 p.

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Brissus bridgeboroensis, a new spatangoid echinoid from the lower Oligocene of southwestern Georgia

  • Burchard D. Carter (a1)

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