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Submitted on: 18 November 2010.
Revised on: 18 January 2011.
Accepted on: 11 February 2011.
___________________AMERICAN NATURALIST---UNIV CHICAGO PRESS
Submitted on: 25 May 2019.
Revised on: 23 August 2019.
Accepted on: 01 October 2019.
___________________AMERICAN NATURALIST---UNIV CHICAGO PRESS
Submitted on: 20 January 2005.
Revised on: 17 May 2005.
Accepted on: 11 July 2005.
___________________AMERICAN NATURALIST---UNIV CHICAGO PRESS
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Submitted on: 14 June 2014.
Revised on: 13 July 2014.
Accepted on: 01 August 2014.
___________________AMERICAN NATURALIST---UNIV CHICAGO PRESS
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