Ptychotrygon ameghinorum
Begat, Kriwet, Gelfo, Cavalli, Schultz & Martin, 2023
Classification: Elasmobranchii Rajiformes Ptychotrygonidae
Reference of the original description
The first southern hemisphere occurrence of the extinct Cretaceous sclerorhynchoid sawfish Ptychotrygon (Chondrichthyes, Batoidea), with a review of Ptychotrygon taxonomy. Journal of Vertebrate Paleontology, 42(2), Article e2162411
The first southern hemisphere occurrence of the extinct Cretaceous sclerorhynchoid sawfish Ptychotrygon (Chondrichthyes, Batoidea), with a review of Ptychotrygon taxonomy. Journal of Vertebrate Paleontology, 42(2), Article e2162411
Description:
Citation: Ptychotrygon ameghinorum Begat, Kriwet, Gelfo, Cavalli, Schultz & Martin, 2023: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 09/2026
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Description
Original diagnosis after Begat, Kriwet, Gelfo, Cavalli, Schultz & Martin, 2023 [31518]: A species of Ptychotrygon characterized by three well-developed transverse crests on the oral tooth crown, the median transverse crest being the best-developed; a well-developed, sharp, and erected central cusp may be present; apron well-developed, rounded, bearing small ridges; lingual uvula short, broad with a rounded lingual extremity; a sharp and abrupt lingual transverse crest, two and an additional marginal foramina are present on lingual root face
Original diagnosis after Begat, Kriwet, Gelfo, Cavalli, Schultz & Martin, 2023 [31518]: A species of Ptychotrygon characterized by three well-developed transverse crests on the oral tooth crown, the median transverse crest being the best-developed; a well-developed, sharp, and erected central cusp may be present; apron well-developed, rounded, bearing small ridges; lingual uvula short, broad with a rounded lingual extremity; a sharp and abrupt lingual transverse crest, two and an additional marginal foramina are present on lingual root face
References
Novel perspectives on Late Cretaceous elasmobranch diversity in the Southern Hemisphere high latitudes. Paläontologische Zeitschrift, 100, 67–90
DOI: 10.1007/s12542-025-00751-y
The first southern hemisphere occurrence of the extinct Cretaceous sclerorhynchoid sawfish Ptychotrygon (Chondrichthyes, Batoidea), with a review of Ptychotrygon taxonomy. Journal of Vertebrate Paleontology, 42(2), Article e2162411
DOI: 10.1080/02724634.2022.2162411
Novel perspectives on Late Cretaceous elasmobranch diversity in the Southern Hemisphere high latitudes. Paläontologische Zeitschrift, 100, 67–90
DOI: 10.1007/s12542-025-00751-y
The first southern hemisphere occurrence of the extinct Cretaceous sclerorhynchoid sawfish Ptychotrygon (Chondrichthyes, Batoidea), with a review of Ptychotrygon taxonomy. Journal of Vertebrate Paleontology, 42(2), Article e2162411
DOI: 10.1080/02724634.2022.2162411
