Scapanorhynchus puercoensis
Bourdon, Wright, Lucas, Spielmann & Pence, 2011
Classification: Elasmobranchii Lamniformes Mitsukurinidae
Reference of the original description
Selachians from the Upper Cretaceous (Santonian) Hosta Tongue of the Point Lookout Sandstone, central New Mexico. New Mexico Museum of Natural History and Science, Bulletin, 52, 1–52
Selachians from the Upper Cretaceous (Santonian) Hosta Tongue of the Point Lookout Sandstone, central New Mexico. New Mexico Museum of Natural History and Science, Bulletin, 52, 1–52
Types
Scapanorhynchus puercoensis
Holotype: NMMNHS: P-60918; Paratype: NMMNHS: P-60965; NMMNHS: P-60990;
Scapanorhynchus puercoensis
Holotype: NMMNHS: P-60918; Paratype: NMMNHS: P-60965; NMMNHS: P-60990;
Description:
Citation: Scapanorhynchus puercoensis Bourdon, Wright, Lucas, Spielmann & Pence, 2011: 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 Bourdon, Wright, Lucas, Spielmann & Pence, 2011 [13214]: Small Scapanorhynchus teeth with the following features: (1) a strongly folded lingual cusp face in both anteriors and laterals; (2) a smooth labial cusp face, often bearing short parallel basal folds; (3) a single cusplet in anterior files with the laterals bearing a pair, the second highly reduced; the cusplets of the upper lateral files are not divergent, the mesial is upright to apically directed, the distal is more inclined towards the commissure; (4) a moderately broad neck; (5) a moderate lingual protuberance with a nutritive groove; and (6) lobes are long, narrow and splayed to give the basal margin a V-shape.
Original diagnosis after Bourdon, Wright, Lucas, Spielmann & Pence, 2011 [13214]: Small Scapanorhynchus teeth with the following features: (1) a strongly folded lingual cusp face in both anteriors and laterals; (2) a smooth labial cusp face, often bearing short parallel basal folds; (3) a single cusplet in anterior files with the laterals bearing a pair, the second highly reduced; the cusplets of the upper lateral files are not divergent, the mesial is upright to apically directed, the distal is more inclined towards the commissure; (4) a moderately broad neck; (5) a moderate lingual protuberance with a nutritive groove; and (6) lobes are long, narrow and splayed to give the basal margin a V-shape.
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
Climate cooling and clade competition likely drove the decline of lamniform sharks. Proceedings of the National Academy of Sciences of the United States of America, 116(41), 20584–20590
DOI: 10.1073/pnas.1902693116
Selachians from the Upper Cretaceous (Santonian) Hosta Tongue of the Point Lookout Sandstone, central New Mexico. New Mexico Museum of Natural History and Science, Bulletin, 52, 1–52
Global impact and selectivity of the Cretaceous-Paleogene mass extinction among sharks, skates, and rays. Science, 379, 802–806
DOI: 10.1126/science.abn2080
Climate cooling and clade competition likely drove the decline of lamniform sharks. Proceedings of the National Academy of Sciences of the United States of America, 116(41), 20584–20590
DOI: 10.1073/pnas.1902693116
Selachians from the Upper Cretaceous (Santonian) Hosta Tongue of the Point Lookout Sandstone, central New Mexico. New Mexico Museum of Natural History and Science, Bulletin, 52, 1–52
