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Submitted on: 07 December 2002.
Revised on: 17 January 2003.
Accepted on: 23 January 2003.
PALEOBIOLOGY---CAMBRIDGE UNIV PRESS
Submitted on: 11 January 2005.
Revised on: 31 January 2005.
Accepted on: 12 February 2005.
PALEOBIOLOGY
Submitted on: 23 May 2013.
Revised on: 13 June 2013.
Accepted on: 04 July 2013.
PALEOBIOLOGY---CAMBRIDGE UNIV PRESS
Submitted on: 28 September 2003.
Revised on: 24 October 2003.
Accepted on: 08 November 2003.
PALEOBIOLOGY