Gregor Radtke

The internal structure of growth interruptions and the dorsal shell wall of Mesozoic ammonoids and its phylogenetic and taxonomic implications

Gregor Radtke, G. Radtke, 2017 .

The dorsal shell wall structure of Mesozoic ammonoids

H. Keupp, Gregor Radtke, G. Radtke, 2017 .

Imbricate radial sculpture: a convergent feature within externally shelled cephalopods

H. Keupp, Gregor Radtke, G. Radtke, 2016 .

Form and Formation of Flares and Parabolae Based on New Observations of the Internal Shell Structure in Lytoceratid and Perisphinctid Ammonoids

R. Hoffmann, H. Keupp, Gregor Radtke, 2016, Acta Palaeontologica Polonica.

The internal structure of varices and constrictions in Jurassic and Cretaceous ammonoid shells

H. Keupp, Gregor Radtke, G. Radtke, 2016, Swiss Journal of Palaeontology.