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

TitleA new elusive otodontid shark (Lamniformes: Otodontidae) from the lower Miocene, and comments on the taxonomy of otodontid genera, including the 'megatoothed' clade
Authors
Issue Date2017
PublisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/08912963.asp
Citation
Historical Biology, 2017, v. 29 n. 5, p. 704-714 How to Cite?
AbstractWe 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 Prefecture, Japan. Extrapolations based on available published data on modern macrophagous lamniforms suggest that the largest specimen of M. paradoxodon gen. nov. et sp. nov. possibly came from an individual that measured at least 3.7 m in total length. All specimens came from deposits in the mid-latitudinal zones representing shallow-water, shelf-type, coastal environments. Its dentition likely exhibited monognathic heterodonty suited for capturing and cutting relatively large prey (e.g. medium-sized fishes). We recommend the genus Otodus to include sharks of the ‘megatoothed’ (e.g. megalodon) lineage in order to avoid Otodus paraphyly. We also propose the following phylogenetic hypothesis: [Kenolamna + [Cretalamna + [Megalolamna + Otodus]]].
Persistent Identifierhttp://hdl.handle.net/10722/240895
ISSN
2019 Impact Factor: 2.023
2015 SCImago Journal Rankings: 0.743
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorShimada, K-
dc.contributor.authorChandler, RE-
dc.contributor.authorLam, OLT-
dc.contributor.authorTanaka, T-
dc.contributor.authorWard, DJ-
dc.date.accessioned2017-05-22T09:19:02Z-
dc.date.available2017-05-22T09:19:02Z-
dc.date.issued2017-
dc.identifier.citationHistorical Biology, 2017, v. 29 n. 5, p. 704-714-
dc.identifier.issn0891-2963-
dc.identifier.urihttp://hdl.handle.net/10722/240895-
dc.description.abstractWe 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 Prefecture, Japan. Extrapolations based on available published data on modern macrophagous lamniforms suggest that the largest specimen of M. paradoxodon gen. nov. et sp. nov. possibly came from an individual that measured at least 3.7 m in total length. All specimens came from deposits in the mid-latitudinal zones representing shallow-water, shelf-type, coastal environments. Its dentition likely exhibited monognathic heterodonty suited for capturing and cutting relatively large prey (e.g. medium-sized fishes). We recommend the genus Otodus to include sharks of the ‘megatoothed’ (e.g. megalodon) lineage in order to avoid Otodus paraphyly. We also propose the following phylogenetic hypothesis: [Kenolamna + [Cretalamna + [Megalolamna + Otodus]]].-
dc.languageeng-
dc.publisherTaylor & Francis Ltd. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/08912963.asp-
dc.relation.ispartofHistorical Biology-
dc.rightsPREPRINT This is a preprint of an article whose final and definitive form has been published in the [JOURNAL TITLE] [year of publication] [copyright Taylor & Francis]; [JOURNAL TITLE] is available online at: http://www.informaworld.com/smpp/ with the open URL of your article POSTPRINT This is an Accepted Manuscript of an article published by Taylor & Francis in [JOURNAL TITLE] on [date of publication], available online: http://wwww.tandfonline.com/[Article DOI] -
dc.titleA new elusive otodontid shark (Lamniformes: Otodontidae) from the lower Miocene, and comments on the taxonomy of otodontid genera, including the 'megatoothed' clade-
dc.typeArticle-
dc.identifier.emailLam, OLT: ottolam@hku.hk-
dc.identifier.authorityLam, OLT=rp01567-
dc.identifier.doi10.1080/08912963.2016.1236795-
dc.identifier.hkuros272166-
dc.identifier.volume29-
dc.identifier.issue5-
dc.identifier.spage704-
dc.identifier.epage714-
dc.identifier.isiWOS:000403094900010-
dc.publisher.placeUnited Kingdom-

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