Ptychotrygon ledouxi
Cappetta, 1973
Classification: Elasmobranchii Rajiformes Ptychotrygonidae
Reference of the original description
Selachians from the Carlile Shale (Turonian) of South Dakota. Journal of Paleontology, 47(3), 504–514
Selachians from the Carlile Shale (Turonian) of South Dakota. Journal of Paleontology, 47(3), 504–514
Description:
Citation: Ptychotrygon ledouxi Cappetta, 1973: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 01/2023
Description
Diagnosis after Cappetta, 1973 [316]: Teeth of fairly small size, with slightly curved highly ornamented crown. Three distinct transverse crests separated by two depressions, the anterior one fairly wide, the posterior one narrow and deep. Anterior zone of the crown highly ornamented. Abrupt posterior face, with slightly projecting medio-posterior uvula. Projecting apron in lateral teeth.
Diagnosis after Cappetta, 1973 [316]: Teeth of fairly small size, with slightly curved highly ornamented crown. Three distinct transverse crests separated by two depressions, the anterior one fairly wide, the posterior one narrow and deep. Anterior zone of the crown highly ornamented. Abrupt posterior face, with slightly projecting medio-posterior uvula. Projecting apron in lateral teeth.
References
Upper Cretaceous sharks from the Black Hills region, Wyoming and South Dakota. Mountain Geologist, 16(2), 59–66
Selachians from the Carlile Shale (Turonian) of South Dakota. Journal of Paleontology, 47(3), 504–514
Upper Cretaceous sharks from the Black Hills region, Wyoming and South Dakota. Mountain Geologist, 16(2), 59–66
Selachians from the Carlile Shale (Turonian) of South Dakota. Journal of Paleontology, 47(3), 504–514
