Dwardius

Dwardius
Temporal range: Cretaceous
Associated teeth of D. woodwardi (NHMUK PV OR 39053) from Cretaceous chalk in Kent, England
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Order: Lamniformes
Family: †Cardabiodontidae
Genus: †Dwardius
Siverson, 1999

Dwardius is an extinct genus of cardabiodontid[1] sharks which existed during the Cretaceous period in what is now Australia, England,[2] France, and India. It was described by Mikael Siverson in 1999,[3] as a new genus for the species Cretalamna woodwardi, which had been described by J. Hermann in 1977.[4] Another species, D. siversoni, was described from the middle Albian of northeastern France by V.I. Zhelezko in 2000; the species epithet honours the author of the genus.[5] A new species, D. sudindicus, was described by Charlie J. Underwood, Anjali Goswami, G.V.R. Prasad, Omkar Verma, and John J. Flynn in 2011, from the Cretaceous Karai Formation of India.[6]

Species

  • Dwardius woodwardi (Hermann, 1977)
  • Dwardius siversoni Zhelezko, 2000
  • Dwardius sudindicus Underwood et al., 2011

References

  1. ^ Mikael Siverson; Marcin Machalski (2017). "Late late Albian (Early Cretaceous) shark teeth from Annopol, Poland". Alcheringa: An Australasian Journal of Palaeontology. 41 (4): 433–463. Bibcode:2017Alch...41..433S. doi:10.1080/03115518.2017.1282981. S2CID 133123002.
  2. ^ Page 148, Dinosaurs in Australia: Mesozoic Life from the Southern Continent, by Benjamin Kear, Robert Hamilton-Bruce. Csiro Publishing, 2011. ISBN 0643102310/ISBN 9780643102316
  3. ^ Siverson, M. 1999. A new large lamniform shark from the uppermost Gearle Siltstone (Cenomanian, Late Cretaceous) of Western Australia. Transactions of the Royal Society of Edinburgh: Earth Sciences 90: 49–66.
  4. ^ Hermann, J., 1977. Les Sélaciens des terrains néocrétacés & paléocènes de Belgique & des contrées limitrophes. Eléments d'une biostratigraphie intercontinentale. Toelicht. Verhand. Geologische en Mijnkaarten van België, n°15, 450 pp.
  5. ^ Zhelezko, V.I. [Železko, V.I.] 2000. The evolution teeth system of sharks of Pseudoisurus Gluckman, 1957 genus—the biggest pelagic sharks of Eurasia [in Russian]. In: B.I. Čuvašov (ed.), Materialy po stratigrafii i paleontologii Urala 4, 136–141. Izdatel'stvo Uralskogo Otdeleniâ Rossijskoj Akademii Nauk, Ekanterinburg.
  6. ^ C. J. Underwood, A. Goswami, G. V. R. Prasad, O. Verma, and J. J. Flynn. 2011. Marine vertebrates from the ‘Middle’ Cretaceous (Early Cenomanian) of South India. Journal of Vertebrate Paleontology 31(3):539-552


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