A new marsupiate cidaroid echinoid from the Maastrichtian of Antarctica

34 3 Tue, 01/01/1991 - 12:00 September 629 635

BLAKE, D. B., ZINSMEISTER, W. J. 1991. A new marsupiate cidaroid echinoid from the Maastrichtian of Antarctica. Palaeontology, 34, 3, 629–635.

Daniel B. Blake and William J. Zinsmeister Almucidaris durhami is a new genus and species of cidaroid echinoid from the Maastrichtian (Late Cretaceous) of Seymour Island, Antarctic Peninsula. The species is unique in that the genital plates of the female are expanded and hollowed to form marsupia. The incidence of brooding in invertebrates, including echinoderms, increases with latitude and apparent stress; stressful conditions might have contributed to the evolution of A. durhami. The Palaeontological Association (Free Access)