Chitinozoans and associated conodonts from the Early Devonian Point Hibbs Formation, Tasmania, Australia.

WA Museum Records and Supplements | Updated 1 decade ago

Abstract - Chitinozoans from the Early Devonian Point Hibbs Formation are described and illustrated; associated conodonts are illustrated for the first time and conodont evidence for dating is reviewed. The chitinozoan species Bulbochitina bulbosa Paris, which has been used as an index species for the late Pragian by Paris et al. (1999) in their global biozonation of the Devonian, occurs in the middle part of the Point Hibbs Formation. Previous studies have shown that the oldest B. bulbosa occurs low in the kindlei Conodont Zone, and the presence of this species suggests that the middle and upper part of the Point Hibbs Formation belong to the kindlei Conodont Zone or higher. Chitinozoan species recovered from Tasmania include those with representatives in western France, Bohemia, Poland, Victoria and northern Queensland.