New cranial material of the acanthothoracid placoderm Palaeacanthaspis vasta from the Lower Devonian of Podolia—phylogenetic and taxonomic significance

• VINCENT DUPRET,
• HUBERT SZANIAWSKI,
• MAREK DEC,
• PIOTR SZREK

Affiliations

VINCENT DUPRET

Uppsala Universitet, Norbyvägen 18A-752 36 Uppsala, Sweden; and Department of Applied Mathematics, Research School of Physics, College of Sciences, Australian National University, Mills Road, Canberra ACT 2601, Australia

HUBERT SZANIAWSKI

Institute of Palaeobiology, Polish Academy of Sciences, Twarda 51/55, 00-818 Warsaw, Poland

MAREK DEC

Polish Geological Institute-National Research Institute, Rakowiecka 4, 00-975 Warsaw, Poland

PIOTR SZREK

Polish Geological Institute-National Research Institute, Rakowiecka 4, 00-975 Warsaw, Poland