CLAUDIA CORTI1, WOLFGANG BÖHME2, MASSIMO DELFINO3 & MARCO MASSETI4 Department of Animal Biology and Genetics, University of Florence, Via Romana, 17, I – 50125 Florence, Italy (e-mail: [email protected]) Zoologisches Forschungsinstitut und Museum »Alexander Koenig«, Adeanuerallee 160, D – 53113 Bonn, Germany (e-mail: [email protected]) Vertebrate Paleontology Research Group, ...