Dear James,
Pedicellaria are quite common in fossil record and known to
paleontologists since very long time. Myself I remember Upper Cretaceous
and Devonian. I do not have at hand reference to the Cretaceous one, but
for the very recently described very rich assemblage from the Devonian
(hard limestones, no great problem to remove from the rock) see:
Boczarowski A. 2001. Isolated sclerites of Devonian non-pelmatozoan
echinoderms. Palaeontologia Polonica 59. There should be no problem to
find this monograph in the US.
Andrzej Pisera
At 17:25 02-11-04 -0600, you wrote:
Folks,
I am teaching about echinoderms in paleo and wondered if pedicellaria
ever showed up in microfossil preparations. Of course it might be
difficult to either separate them from the limestone, since both might
dissolve in acid and if you did they might not be recognized.
If someone knows how to find them, I might try it with some Gilmore
City limestone (Mississippian age).
James Mahaffy
(mahaffy@dordt.edu)
Phone: 712 722-6279
Biology
Department
FAX : 712 722-1198
Dordt College, Sioux Center IA 51250
******************************
*Andrzej
Pisera
*
*Institute of Paleobiology *
*Polish Academy of Sciences *
*ul. Twarda
51/55
*
*00-818 Warszawa, Poland *
*tel. (48-22) 6978871 *
*fax (48-22) 6206225
*
******************************