Fig. 2From: The first tooth set of Ptychodus atcoensis (Elasmobranchii: Ptychodontidae), from the Cretaceous of VenezuelaPartial tooth set from lower jaw of Ptychodus atcoensis (CU-010). a Specimen in occlusal view. b Specimen in labial view. Anatomical abbreviations: sf symphyseal tooth file, 1llf first left lateral tooth file, 1rlf and 2rlf first and second right lateral tooth fileBack to article page