Dwardius
| Dwardius | |
|---|---|
Scientific 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 otodontid sharks which existed during the Cretaceous period in what is now Australia, England,[1] France, and India. It was described by Mikael Siverson in 1999,[2] as a new genus for the species Cretalamna woodwardi, which had been described by J. Hermann in 1977.[3] 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.[4] 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 of India.[5]
Species
- Dwardius woodwardi (Hermann, 1977)
- Dwardius siversoni Zhelezko, 2000
- Dwardius sudindicus Underwood et al., 2011
References
- ^ Page 148, Dinosaurs in Australia: Mesozoic Life from the Southern Continent, by Benjamin Kear, Robert Hamilton-Bruce. Csiro Publishing, 2011. ISBN 0643102310/ISBN 9780643102316
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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