Cretolamna sarcoportheta
Siverson, Lindgren, Newbrey, Cederström & Cook, 2015
Classification: Elasmobranchii Lamniformes Otodontidae
Reference of the original description
Cenomanian–Campanian (Late Cretaceous) mid-palaeolatitude sharks of Cretalamna appendiculata type. Acta Palaeontologica Polonica, 60(2), 339–384
Cenomanian–Campanian (Late Cretaceous) mid-palaeolatitude sharks of Cretalamna appendiculata type. Acta Palaeontologica Polonica, 60(2), 339–384
Types
Cretolamna sarcoportheta
Cretolamna sarcoportheta
Description:
Citation: Cretolamna sarcoportheta Siverson, Lindgren, Newbrey, Cederström & Cook, 2015: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 09/2026
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info@shark-references.com
Description
Original diagnosis after Siverson, Lindgren, Newbrey, Cederström & Cook, 2015 [22014]: Robust anterior teeth with thick, moderately tall, triangular cusp; either straight, somewhat distally inclined or very slightly curved/recurved. Root asymmetrically subtriangular in basal view in anterior teeth with one lobe considerably broader than other lobe. Cusp very broad and triangular in anteriorly situated lateroposterior teeth with flat labial face of cusp in profile view. Cusp narrower, generally more upright in lateroposterior teeth with slightly lingually curved cusp in profile view. Root markedly asymmetrical in basal view in anteriorly situated upper lateroposterior teeth with distal lobe narrower than mesial lobe in all but one tooth type. Latter, distinct tooth type with apically curved cusp and sub-rectangular root in basal view, with root-lobe on same side of vertical mid-line of tooth as apex of cusp more compressed than other lobe.
Original diagnosis after Siverson, Lindgren, Newbrey, Cederström & Cook, 2015 [22014]: Robust anterior teeth with thick, moderately tall, triangular cusp; either straight, somewhat distally inclined or very slightly curved/recurved. Root asymmetrically subtriangular in basal view in anterior teeth with one lobe considerably broader than other lobe. Cusp very broad and triangular in anteriorly situated lateroposterior teeth with flat labial face of cusp in profile view. Cusp narrower, generally more upright in lateroposterior teeth with slightly lingually curved cusp in profile view. Root markedly asymmetrical in basal view in anteriorly situated upper lateroposterior teeth with distal lobe narrower than mesial lobe in all but one tooth type. Latter, distinct tooth type with apically curved cusp and sub-rectangular root in basal view, with root-lobe on same side of vertical mid-line of tooth as apex of cusp more compressed than other lobe.
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
Campanian sharks, rays and other fossils from a long-gone Basque-Cantabrian sea. Publica, Autor & Editor, Vitoria-Gasteiz, 274 pp. [ISBN: 978-84-09-30406-6]
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
Upper Cretaceous neoselachians from the Basque-Cantabrian Region (Northern Spain). Unpublished doctoral thesis, University of the Basque Country (UPV/EHU), Leioa, 479 pp.
Global impact and selectivity of the Cretaceous-Paleogene mass extinction among sharks, skates, and rays. Science, 379, 802–806
DOI: 10.1126/science.abn2080
Campanian sharks, rays and other fossils from a long-gone Basque-Cantabrian sea. Publica, Autor & Editor, Vitoria-Gasteiz, 274 pp. [ISBN: 978-84-09-30406-6]
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
Upper Cretaceous neoselachians from the Basque-Cantabrian Region (Northern Spain). Unpublished doctoral thesis, University of the Basque Country (UPV/EHU), Leioa, 479 pp.
