Ptychotrygon blainensis
Case, 1978
Classification: Elasmobranchii Rajiformes Ptychotrygonidae
Reference of the original description
A new selachian fauna from the Judith River Formation (Campanian) of Montana. Palaeontographica, Abt. A, 160(1–6), 176–205
A new selachian fauna from the Judith River Formation (Campanian) of Montana. Palaeontographica, Abt. A, 160(1–6), 176–205
Synonyms / new combinations and misspellings
Ptychotrygon aff. blainensis, Ptychotrygon cf. blainensis
Ptychotrygon aff. blainensis, Ptychotrygon cf. blainensis
Types
Ptychotrygon blainensis
Holotype: USTL: MTA 33; Paratype: USTL: MTA 34a; USTL: MTA 34b; USTL: MTA 34c; USTL: MTA 35;
Ptychotrygon blainensis
Holotype: USTL: MTA 33; Paratype: USTL: MTA 34a; USTL: MTA 34b; USTL: MTA 34c; USTL: MTA 35;
Description:
Citation: Ptychotrygon blainensis Case, 1978: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 04/2024
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Description
Original diagnose after Case (1978) p. 197 [388]: Teeth of small size, crown greater in length than width, with high cuspidate crown, bearing two transversally positioned ridges in the direction of the internal (lingual) aspect (cf. Text-fig. 16b). The forward ridge outlining a convex area on the lingual face of the crown, while the main ridge separates the internal view at the apex of the crown from the occlusal face of the tooth enameloid.
Original diagnose after Case (1978) p. 197 [388]: Teeth of small size, crown greater in length than width, with high cuspidate crown, bearing two transversally positioned ridges in the direction of the internal (lingual) aspect (cf. Text-fig. 16b). The forward ridge outlining a convex area on the lingual face of the crown, while the main ridge separates the internal view at the apex of the crown from the occlusal face of the tooth enameloid.
References
Global impact and selectivity of the Cretaceous-Paleogene mass extinction among sharks, skates, and rays. Science, 379, 802–806
DOI: 10.1126/science.abn2080
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
A Vertebrate Assemblage from the Marine Shales of the Lethbridge Coal Zone. In P. J. Currie and E. B. Koppelhus(eds.) Dinosaur Provincial Park, A spectacular ancient ecosystem revealed. Indiana University Press, Bloomington and Indianapolis, Indiana: 486–500
Additions aux faunes de sélaciens du Crétacé du Texas (Albien supérieur-Campanien). Palaeo Ichthyologica, 9, 5–111
An elasmobranch assemblage from the terrestrial-marine transitional Lethbridge Coal Zone (Dinosaur Park Formation: Upper Campanian), Alberta, Canada. Journal of Paleontology, 73(3), 494–503
A new selachian fauna from the Judith River Formation (Campanian) of Montana. Palaeontographica, Abt. A, 160(1–6), 176–205
Global impact and selectivity of the Cretaceous-Paleogene mass extinction among sharks, skates, and rays. Science, 379, 802–806
DOI: 10.1126/science.abn2080
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
A Vertebrate Assemblage from the Marine Shales of the Lethbridge Coal Zone. In P. J. Currie and E. B. Koppelhus(eds.) Dinosaur Provincial Park, A spectacular ancient ecosystem revealed. Indiana University Press, Bloomington and Indianapolis, Indiana: 486–500
Additions aux faunes de sélaciens du Crétacé du Texas (Albien supérieur-Campanien). Palaeo Ichthyologica, 9, 5–111
An elasmobranch assemblage from the terrestrial-marine transitional Lethbridge Coal Zone (Dinosaur Park Formation: Upper Campanian), Alberta, Canada. Journal of Paleontology, 73(3), 494–503
A new selachian fauna from the Judith River Formation (Campanian) of Montana. Palaeontographica, Abt. A, 160(1–6), 176–205
