New cranial material of the acanthothoracid placoderm Palaeacanthaspis vasta from the Lower Devonian of Podolia—phylogenetic and taxonomic significance
Evolutionsbiologiskt centrum (EBC), Uppsala Universitet, Norbyvägen 18A-752 36 Uppsala, Sweden
Department of Applied Mathematics, Research School of Physics, College of Sciences, Australian National University, Mills Road, Canberra ACT 2601, Australia