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Submitted on: 17 September 1999.
Revised on: 25 December 1999.
Accepted on: 28 January 2000.
___________________AMERICAN NATURALIST---UNIV CHICAGO PRESS
Submitted on: 20 May 2015.
Revised on: 19 June 2015.
Accepted on: 26 July 2015.
___________________AMERICAN NATURALIST---UNIV CHICAGO PRESS
http://reply.papertrans.cn/1/15/1477/1477-14.png
Submitted on: 28 February 2006.
Revised on: 11 June 2006.
Accepted on: 21 June 2006.
___________________AMERICAN NATURALIST---UNIV CHICAGO PRESS
http://reply.papertrans.cn/1/15/1477/1477-16.png
http://reply.papertrans.cn/1/15/1477/1477-17.png
Submitted on: 31 October 2019.
Revised on: 27 December 2019.
Accepted on: 30 January 2020.
___________________AMERICAN NATURALIST---UNIV CHICAGO PRESS
Submitted on: 29 December 2013.
Revised on: 17 March 2014.
Accepted on: 04 May 2014.
___________________AMERICAN NATURALIST---UNIV CHICAGO PRESS
Submitted on: 24 November 2016.
Revised on: 17 December 2016.
Accepted on: 27 January 2017.
___________________AMERICAN NATURALIST---UNIV CHICAGO PRESS