A new elusive otodontid shark (Lamniformes: Otodontidae) from the lower Miocene, and comments on the taxonomy of otodontid genera, including the ‘megatoothed’ clade

@article{Shimada2017ANE,
  title={A new elusive otodontid shark (Lamniformes: Otodontidae) from the lower Miocene, and comments on the taxonomy of otodontid genera, including the ‘megatoothed’ clade},
  author={Kenshu Shimada and Richard E. Chandler and Otto Lok Tao Lam and Takeshi Tanaka and David J Ward},
  journal={Historical Biology},
  year={2017},
  volume={29},
  pages={704 - 714}
}
Abstract We describe a new large otodontid lamniform shark, Megalolamna paradoxodon gen. nov. et sp. nov., chronostratigraphically restricted to the early Miocene (Aquitanian–Burdigalian). This new species is based on isolated teeth found from five globally distributed localities: the Jewett Sand in southern California, USA; the Pungo River Formation of North Carolina, USA; the Chilcatay Formation of Peru; the Oi Formation in Mie Prefecture, Japan; and the O’oshimojo Formation in Nagano… Expand
The size of the megatooth shark, Otodus megalodon (Lamniformes: Otodontidae), revisited
ABSTRACT Otodus megalodon (Lamniformes: Otodontidae) is a gigantic late Neogene shark that lived nearly worldwide in tropical-temperate regions. Its gigantic teeth have captivated imaginations of theExpand
The Early Pliocene extinction of the mega-toothed shark Otodus megalodon: a view from the eastern North Pacific
TLDR
All records of Otodus megalodon from post-Messinian marine strata from western North America are reviewed and a published dataset is reevaluated, thoroughly vetting each occurrence and justifying the geochronologic age of each, as well as excluding several dubious records. Expand
Diversity and paleoenvironmental implications of an elasmobranch assemblage from the Oligocene–Miocene boundary of Ecuador
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A new elasmobranch assemblage is described from the rich fossil site of Montañita-Olón (Dos Bocas Formation, Santa Elena, Ecuador), where other vertebrates have already been described: for example, sea turtles and cetaceans. Expand
A rhinopristiform sawfish (genus Pristis) from the middle Eocene (Lutetian) of southern Peru and its regional implications
Modern sawfishes (Rhinopristiformes: Pristidae) are circumglobally distributed in warm waters and are common in proximal marine and even freshwater habitats. The fossil record of modern pristidExpand
Eocene sand tiger sharks (Lamniformes, Odontaspididae) from the Bolca Konservat-Lagerstätte, Italy: palaeobiology, palaeobiogeography and evolutionary significance
TLDR
The unambiguous first report of this lamniform shark in the Eocene Bolca Konservat-Lagerstätte improves knowledge concerning the diversity and palaeobiology of the cartilaginous fishes of this palaeontological site, and provides new insights about the biotic turnovers that involved the high trophic levels of the marine settings after the end-Cretaceous extinction. Expand
Did the giant extinct shark Carcharocles megalodon target small prey? Bite marks on marine mammal remains from the late Miocene of Peru
TLDR
Bite marks incising fossil mammal bones collected from upper Miocene deposits of the Pisco Formation exposed at Aguada de Lomas (southern Peru) significantly expand the still scarce record of bite marks for C. megalodon and are interpreted as an apex predator whose trophic spectrum was focused on relatively small-sized prey. Expand
The early Miocene elasmobranch assemblage from Zamaca (Chilcatay Formation, Peru)
Abstract A newly discovered elasmobranch assemblage from the fossil-bearing area of Zamaca (Chilcatay Formation, southern Peru) is described herein, providing a first comprehensive view on the earlyExpand
A megatoothed shark (Carcharocles angustidens) nursery in the Oligocene Charleston Embayment, South Carolina, USA
Many extant sharks are cosmopolitan as adults but inhabit nursery areas as youngsters often shallow, dynamic ecosystems with abundant prey for neonates and juveniles. Megatoothed sharks (Otodontidae)Expand
Body length estimation of Neogene macrophagous lamniform sharks (Carcharodon and Otodus) derived from associated fossil dentitions
The megatooth shark, Otodus megalodon, is widely accepted as the largest macrophagous shark that ever lived; and yet, despite over a century of research, its size is still debated. The great whiteExpand
Body dimensions of the extinct giant shark Otodus megalodon: a 2D reconstruction
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Body dimensions based on anatomical measurements of five ecologically and physiologically similar extant lamniforms suggest that the extinct giant shark †O. Expand
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