Ptychotrygon ledouxi

Cappetta, 1973


Classification: Elasmobranchii Rajiformes Ptychotrygonidae

Reference of the original description
Cappetta, H. (1973)
Selachians from the Carlile Shale (Turonian) of South Dakota. Journal of Paleontology, 47(3), 504–514

Types
Ptychotrygon ledouxi
Holotype: USTL: SDK-70;


Description:


Citation: Ptychotrygon ledouxi Cappetta, 1973: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 01/2023

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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.

Remarks
valid after Cappetta (1973) p. 511 [316]

References
Evetts, M.J. (1979)
Upper Cretaceous sharks from the Black Hills region, Wyoming and South Dakota. Mountain Geologist, 16(2), 59–66
Cappetta, H. (1973)
Selachians from the Carlile Shale (Turonian) of South Dakota. Journal of Paleontology, 47(3), 504–514