Otodus chubutensis
(Ameghino, 1901)
Classification: Elasmobranchii Lamniformes Otodontidae
Reference of the original description
L'âge des formations sédimentaires de Patagonie. Anales de la Sociedad Científica Argentina, 51, 20–39, 65–91
L'âge des formations sédimentaires de Patagonie. Anales de la Sociedad Científica Argentina, 51, 20–39, 65–91
Types
Otodus chubutensis
Otodus chubutensis
Images of types
Description:
Citation: Otodus chubutensis (Ameghino, 1901): In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 06/2026
Description
Original diagnosis after Ameghino (1901) p. 83 [50]: Carcharodon chubutensis n. sp. Aussi grande que C. megalodon ; les dents en différent par le bord postérieur plus creusé, et par la présence sur la base d'une paire de saillies larges et basses et á bords dentelés comme le grand cône principal; ces saillies sont accompagnées d'une paire de tous petits tubercules basales. Ces caractères sont plus fortement marqués sur les dents postérieures que sur les antérieures.
Original diagnosis after Ameghino (1901) p. 83 [50]: Carcharodon chubutensis n. sp. Aussi grande que C. megalodon ; les dents en différent par le bord postérieur plus creusé, et par la présence sur la base d'une paire de saillies larges et basses et á bords dentelés comme le grand cône principal; ces saillies sont accompagnées d'une paire de tous petits tubercules basales. Ces caractères sont plus fortement marqués sur les dents postérieures que sur les antérieures.
References
link: https://molasse-haie-rochen.de/haie/lamniformes/otodus-megaselachus-chubutensis/
link: https://molasse-haie-rochen.de/haie/lamniformes/otodus-megaselachus-chubutensis/
Remarks
shark-references Species-ID=15372;
Weblink: Haie und Rochen der Molasse -Otodus (Megaselachus) chubutensis (Ameghino, 1901)
shark-references Species-ID=15372;
Weblink: Haie und Rochen der Molasse -Otodus (Megaselachus) chubutensis (Ameghino, 1901)
References
The earliest Neogene vertebrate assemblage of the Pisco Basin, Peru. Journal of South American Earth Sciences, 178, Article 106080
DOI: 10.1016/j.jsames.2026.106080
Paleozoic, Mesozoic and Cenozoic Chondrichthyes from the Japanese Islands. National Museum of Nature and Science Monographs, 56, 1–184
Miocene marine vertebrate trophic ecology reveals megatooth sharks as opportunistic supercarnivores. Earth and Planetary Science Letters, 664, Article 119392
DOI: 10.1016/j.epsl.2025.119392
Zähne von Otodus in der Schweiz und ein Neufund von der Burg Freienstein. Schweizer Strahler, 2025, 26–31
Fossils of the megatoothed shark Otodus (Chondrichthyes, Lamniformes) from Washington State, USA. Paläontologische Zeitschrift, in press
DOI: 10.1007/s12542-025-00758-5
Faszination Haie – Die Welt der fossilen und der lebenden Haie. Der Steinkern, 58, 1–116
Applying zinc isotopes to investigate the trophic positions of extinct marine vertebrates, including the megatooth shark Otodus megalodon, in ancient marine ecosystems [Abstract]. EGU General Assembly 2024, Vienna, Austria
DOI: 10.5194/egusphere-egu24-8484
Enigmatic carbonate isotope values in shark teeth: Evidence for environmental and dietary controls. Palaeogeography, Palaeoclimatology, Palaeoecology, 635, Article 111943
DOI: 10.1016/j.palaeo.2023.111943
The chondrichthyan fossil record of the Florida Platform (Eocene–Pleistocene). Paleobiology, 48(4), 622–654
DOI: 10.1017/pab.2021.47
Trophic position of Otodus megalodon and great white sharks through time revealed by zinc isotopes. Nature Communications, 13, Article 2980
DOI: 10.1038/s41467-022-30528-9
Cenozoic megatooth sharks occupied extremely high trophic positions. Science Advances, 8(25), Article eabl6529
DOI: 10.1126/sciadv.abl6529
Body length estimation of Neogene macrophagous lamniform sharks (Carcharodon and Otodus) derived from associated fossil dentitions. Palaeontologia Electronica, 24(1), Article a09
DOI: 10.26879/1140
Otodus-bitten sperm whale tooth from the Neogene of the Coastal Eastern United States. Acta Palaeontologica Polonica, 66(3), 599–603
DOI: 10.4202/app.00820.2020
Macroborings in Otodus megalodon and Otodus chubutensis Shark Teeth from the Submerged Shelf of Onslow Bay, North Carolina, USA: Implications for Processes of Lag Deposit Formation. Ichnos, 27(2), 122–141
DOI: 10.1080/10420940.2019.1697257
Megalodon und Weißer Hai – Neues zu Evolution, Taxonomie und Paläoökologie. Fossilien, 36(6), 33–38
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
Lamniform and Carcharhiniform Sharks from the Pungo River and Yorktown Formations (Miocene–Pliocene) of the Submerged Continental Shelf, Onslow Bay, North Carolina, USA. Copeia, 106(2), 353–374
DOI: 10.1643/OT-18-016
The earliest Neogene vertebrate assemblage of the Pisco Basin, Peru. Journal of South American Earth Sciences, 178, Article 106080
DOI: 10.1016/j.jsames.2026.106080
Paleozoic, Mesozoic and Cenozoic Chondrichthyes from the Japanese Islands. National Museum of Nature and Science Monographs, 56, 1–184
Miocene marine vertebrate trophic ecology reveals megatooth sharks as opportunistic supercarnivores. Earth and Planetary Science Letters, 664, Article 119392
DOI: 10.1016/j.epsl.2025.119392
Zähne von Otodus in der Schweiz und ein Neufund von der Burg Freienstein. Schweizer Strahler, 2025, 26–31
Fossils of the megatoothed shark Otodus (Chondrichthyes, Lamniformes) from Washington State, USA. Paläontologische Zeitschrift, in press
DOI: 10.1007/s12542-025-00758-5
Faszination Haie – Die Welt der fossilen und der lebenden Haie. Der Steinkern, 58, 1–116
Applying zinc isotopes to investigate the trophic positions of extinct marine vertebrates, including the megatooth shark Otodus megalodon, in ancient marine ecosystems [Abstract]. EGU General Assembly 2024, Vienna, Austria
DOI: 10.5194/egusphere-egu24-8484
Enigmatic carbonate isotope values in shark teeth: Evidence for environmental and dietary controls. Palaeogeography, Palaeoclimatology, Palaeoecology, 635, Article 111943
DOI: 10.1016/j.palaeo.2023.111943
The chondrichthyan fossil record of the Florida Platform (Eocene–Pleistocene). Paleobiology, 48(4), 622–654
DOI: 10.1017/pab.2021.47
Trophic position of Otodus megalodon and great white sharks through time revealed by zinc isotopes. Nature Communications, 13, Article 2980
DOI: 10.1038/s41467-022-30528-9
Cenozoic megatooth sharks occupied extremely high trophic positions. Science Advances, 8(25), Article eabl6529
DOI: 10.1126/sciadv.abl6529
Body length estimation of Neogene macrophagous lamniform sharks (Carcharodon and Otodus) derived from associated fossil dentitions. Palaeontologia Electronica, 24(1), Article a09
DOI: 10.26879/1140
Otodus-bitten sperm whale tooth from the Neogene of the Coastal Eastern United States. Acta Palaeontologica Polonica, 66(3), 599–603
DOI: 10.4202/app.00820.2020
Macroborings in Otodus megalodon and Otodus chubutensis Shark Teeth from the Submerged Shelf of Onslow Bay, North Carolina, USA: Implications for Processes of Lag Deposit Formation. Ichnos, 27(2), 122–141
DOI: 10.1080/10420940.2019.1697257
Megalodon und Weißer Hai – Neues zu Evolution, Taxonomie und Paläoökologie. Fossilien, 36(6), 33–38
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
Lamniform and Carcharhiniform Sharks from the Pungo River and Yorktown Formations (Miocene–Pliocene) of the Submerged Continental Shelf, Onslow Bay, North Carolina, USA. Copeia, 106(2), 353–374
DOI: 10.1643/OT-18-016
