''Dwardius'' is an extinct

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

of cardabiodontid sharks which existed during the

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of ...

period in what is now Australia,

England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe ...

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan ar ...

, and

India India, officially the Republic of India ( Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the ...

. It was described by Mikael Siverson in 1999, as a new genus for the species ''

Cretalamna ''Cretalamna'' is a genus of extinct otodontid shark that lived from the latest Early Cretaceous to Eocene epoch (about 103 to 46 million years ago). It is considered by many to be the ancestor of the largest sharks to have ever lived, '' Otodu ...

woodwardi'', which had been described by J. Hermann in 1977. Another species, ''D. siversoni'', was described from the middle

Albian The Albian is both an age of the geologic timescale and a stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early/Lower Cretaceous Epoch/ Series. Its approximate time range is 113.0 ± 1.0 Ma to 100.5 ± ...

of northeastern France by V.I. Zhelezko in 2000; the

species epithet Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany) A botanical name ...

honours the author of the

. 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 Karai may refer to: Toponym *Karai, Iran, *Karai, Perak, Malaysia * Karai, Sultanpur, a village in Uttar Pradesh, India Demonym *Qarai Turks (''Karāʾi, Qarāʾi'') or "Black Tatars" *Karai, caste subdivision among Mallar (caste), Urali Gounde ...

of India.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

Species

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

References

External links

''Dwardius''
at the

Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms. History The Paleobiology Database (PBDB) originated in the NCEAS-funded Phanerozoic Marine Paleo ...

www.helsinki.fi

{{Taxonbar, from=Q5317882 Otodontidae Fossil taxa described in 1999 Prehistoric fish of Australia