Megascyliorhinus trelewensis
Clone, 1986
Classification: Elasmobranchii Carcharhiniformes Scyliorhinidae
Reference of the original description
A new Megascyliorhinus (Chondrichthyes, Galeomorphii) from the Middle Tertiary of Patagonia. Journal of Vertebrate Paleontology, 6(2), 105–112
A new Megascyliorhinus (Chondrichthyes, Galeomorphii) from the Middle Tertiary of Patagonia. Journal of Vertebrate Paleontology, 6(2), 105–112
Description:
Citation: Megascyliorhinus trelewensis Clone, 1986: 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 Clone, 1986 [477]: Megascyliorhinus of large size; crown curving lingually; labial face very strongly and deeply striated; lingual face with delicate, sinuous, anastomosing striations; lateral cutting edge sometimes reaching the base of the crown; lobes of the root diverging strongly; base of the root not flat, but with lobes inclinded toward anterior central line in the lingual region. Basal root groove never reaching lingual face or absent. Lateral denticles differently developed. Lateroposterior teeth stocky.
Original diagnosis after Clone, 1986 [477]: Megascyliorhinus of large size; crown curving lingually; labial face very strongly and deeply striated; lingual face with delicate, sinuous, anastomosing striations; lateral cutting edge sometimes reaching the base of the crown; lobes of the root diverging strongly; base of the root not flat, but with lobes inclinded toward anterior central line in the lingual region. Basal root groove never reaching lingual face or absent. Lateral denticles differently developed. Lateroposterior teeth stocky.
References
Type specimens of fossil fishes at the Museo de La Plata: a catalog. Publicación Electrónica de la Asociación Paleontológica Argentina, 26(2), 1–29
DOI: 10.5710/PEAPA.16.06.2026.566
Combining palaeontological and neontological data shows a delayed diversification burst of carcharhiniform sharks likely mediated by environmental change. Scientific Reports, 12, Article 21906
DOI: 10.1038/s41598-022-26010-7
Early Miocene cartilaginous fishes (Chondrichthyes: Holocephali, Elasmobranchii) from Chile: Diversity and palaeobiogeographic implications. Journal of South American Earth Sciences, 96, Article 102317
DOI: 10.1016/j.jsames.2019.102317
The modulating role of traits on the biogeographic dynamics of chondrichthyans from the Neogene to the present. Paleobiology, 44(2), 251–262
DOI: 10.1017/pab.2018.7
Peces del Mioceno marino y continental en Entre Ríos, Oriente central de Argentina. In El Neógeno de la Mesopotamia argentina. D. Brandoni y J.I. Noriega, Editores(2013), Asociación Paleontológica Argentina, Publicación Especial 14: 71–83
Marine vertebrate assemblages in the southwest Atlantic during the Miocene. Biological Journal of the Linnean Society, 103, 423–440
DOI: 10.1111/j.1095-8312.2011.01685.x
Megascyliorhinus trelewensis (Neoselachii) in the ?Middle-Upper Miocene of Paraná, Central eastern Argentina. INSUGEO, Miscelánea, 17: 41–48
An Early Miocene elasmobranch fauna from the Navidad Formation, Central Chile, South America. Cainozoic Research, 4(1–2), 3–18
Vertebrados marinos del miembro inferior de la Formación Navidad (Mioceno temprano), Chile central [Abstract]. In 1° Congreso Latinoamericano de Paleontologia de Vertebrados, Chiele
The record of fossil fishes of southern South America. Münchner Geowissenschaftliche Abhandlungen Reihe A, Geologie und Paläontologie, 30, 9–72
A new Megascyliorhinus (Chondrichthyes, Galeomorphii) from the Middle Tertiary of Patagonia. Journal of Vertebrate Paleontology, 6(2), 105–112
DOI: 10.1080/02724634.1986.10011604
Type specimens of fossil fishes at the Museo de La Plata: a catalog. Publicación Electrónica de la Asociación Paleontológica Argentina, 26(2), 1–29
DOI: 10.5710/PEAPA.16.06.2026.566
Combining palaeontological and neontological data shows a delayed diversification burst of carcharhiniform sharks likely mediated by environmental change. Scientific Reports, 12, Article 21906
DOI: 10.1038/s41598-022-26010-7
Early Miocene cartilaginous fishes (Chondrichthyes: Holocephali, Elasmobranchii) from Chile: Diversity and palaeobiogeographic implications. Journal of South American Earth Sciences, 96, Article 102317
DOI: 10.1016/j.jsames.2019.102317
The modulating role of traits on the biogeographic dynamics of chondrichthyans from the Neogene to the present. Paleobiology, 44(2), 251–262
DOI: 10.1017/pab.2018.7
Peces del Mioceno marino y continental en Entre Ríos, Oriente central de Argentina. In El Neógeno de la Mesopotamia argentina. D. Brandoni y J.I. Noriega, Editores(2013), Asociación Paleontológica Argentina, Publicación Especial 14: 71–83
Marine vertebrate assemblages in the southwest Atlantic during the Miocene. Biological Journal of the Linnean Society, 103, 423–440
DOI: 10.1111/j.1095-8312.2011.01685.x
Megascyliorhinus trelewensis (Neoselachii) in the ?Middle-Upper Miocene of Paraná, Central eastern Argentina. INSUGEO, Miscelánea, 17: 41–48
An Early Miocene elasmobranch fauna from the Navidad Formation, Central Chile, South America. Cainozoic Research, 4(1–2), 3–18
Vertebrados marinos del miembro inferior de la Formación Navidad (Mioceno temprano), Chile central [Abstract]. In 1° Congreso Latinoamericano de Paleontologia de Vertebrados, Chiele
The record of fossil fishes of southern South America. Münchner Geowissenschaftliche Abhandlungen Reihe A, Geologie und Paläontologie, 30, 9–72
A new Megascyliorhinus (Chondrichthyes, Galeomorphii) from the Middle Tertiary of Patagonia. Journal of Vertebrate Paleontology, 6(2), 105–112
DOI: 10.1080/02724634.1986.10011604
