Data from: Unraveling species concepts for the Helicoprion tooth whorl

负责人：

关键词：

Helicoprion davisii;Permian;Helicoprion ergassaminon;dentition;Morphometry;Euchondrocephali;Chondrichthyes;Helicoprion bessonowi

DOI：

doi:10.5061/dryad.q64g3

摘要：

. Differentiation of form is evident among specimens only after the second volution or roughly the 85th tooth. Helicoprion davisii has widely-spaced, stout teeth