Affiliation: | (1) Geologisch-Pal?ontologisches Institut, Universit?t Basel, Bernoullistrasse 32, CH-4056 Basel, Switzerland;(2) Present address: Geologisches Institut, Albert-Ludwigs-Universit?t Freiburg, Albertstr. 23b, D-79104 Freiburg, Germany;(3) Present address: Institut für Geologie und Pal?ontologie, Universit?t Innsbruck, Innrain 52, A-6020 Innsbruck, Austria |