Hypermorphosis in Salaziceras, a Cretaceous ammonite, from Madagascar

 

 

William James Kennedy^I; Herbert Christian Klinger^II

^IOxford University Museum of Natural History, Parks Road, Oxford, 0X1 3PW, U.K. E-mail: jim.kennedy®oum.ox.ac.uk
^IINatural History Collections Department, Iziko South African Museum, P.O. Box 61. Cape Town, 8000 South Africa, E-mail: hklinger@iziko.org.za.

 

 

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ABSTRACT

An enigmatic ammonite from Mont Raynaud, Madagascar, originally referred to the Upper Cenomanian Calycoceras (Calycoceras ) naviculare (Mantell, 1822) is associated with an exclusively upper Upper Albian fauna. It is interpreted as a new, hypermorphic giant species of Salaziceras Breistroffer, 1936, S. lemoinei.

Keywords: Cretaceous, ammonite, Salaziceras, Hypermorphosis, Albian, Madagascar.

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ACKNOWLEDGEMENTS

We thank the late H. Gauthier for arranging access to the Sorbonne Collections, and the staff of the Department of Earth Sciences, Oxford, and the Geological Collections, Oxford University Museum ofNatural History, for technical support.

 

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Received 6 October 2008
Accepted 13 October 2008

 

 

Department of Geological Sciences, University of Cape Town. Private Bag, Rondebosch, 7701 South Africa