Comment and reply on “Palaeoenvironmental control on distribution of crinoids in the Bathonian (Middle Jurassic) of England and France” by Aaron W. Hunter and Charlie J. Underwood

摘要

Mariusz A. Salamon, Przemysaw Gorzelak, and Micha Zato (2010) have presented an interesting discussion of our paper. We would like to thank these authors for bringing the extensive work on crinoid systematics and palaeoecology from Eastern Europe (Pisera and Dzik 1979; Guchowski 1987; Salamon et al. 2006, 2008; Salamon and Zato 2006, 2007; Salamon 2008a, b, c, 2009; Zato et al. 2008) to our attention. Some of this im portant data was inadvertently omitted from, or postdated the acceptance of, Hunter and Underwood (2009). It should be pointed out that the facies classification used in Hunter and Underwood (2009) were developed to investigate Middle Jurassic (Bathonian) shark ecology (see Underwood, and Ward 2004) and only later independently applied to echino derm taxa. When crinoid occurrence was plotted onto this facies model, it was evident that the distribution of crinoid species cor responded so well to these particular facies, even though the fa cies control on other echinoderms, especially asterozoans, is not as clearcut (Hunter 2006).