I seem to recall that larval fishes or something like them had been found
at Mazon Creek. Check the book 'Mazon Creek Fossils' ed. by M. Nitecki.
Best wishes, Bill
___________________
William A. Shear
Department of Biology
Hampden-Sydney College
Hampden-Sydney VA 23943 USA
phone (804) 223-6172
FAX (804) 223-6374