''Myliobatis'' is a
genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of
eagle ray
The eagle rays are a group of cartilaginous fishes in the family Myliobatidae, consisting mostly of large species living in the open ocean rather than on the sea bottom.
Eagle rays feed on mollusks, and crustaceans, crushing their shells with th ...
s in the
family
Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
Myliobatidae.
Description
''Myliobatis'' species can reach a width up to about .
Their bodies consist of a rhomboidal disc, wider than long, with one dorsal fin. The head is broad and short, with eyes and spiracles on the sides. The tail is slender, with one or two large spines at the base, without tail fin.
[Discover life]
/ref>
The teeth are arranged in the lower and upper jaws in flat tooth plates called pavement teeth, each consisting of about seven series of plates, which are used to crush clam shells and crustaceans.[
]
Biology
''Myliobatis'' species are ovoviviparous
Ovoviviparity, ovovivipary, ovivipary, or aplacental viviparity is a "bridging" form of reproduction between egg-laying oviparity, oviparous and live-bearing viviparity, viviparous reproduction. Ovoviviparous animals possess embryos that develo ...
. Their gestation lasts about six months, and a female produces four to seven embryos. ''Myliobatis'' species mainly feed on molluscs, bottom-living crustaceans, and small fishes.[
]
Habitat
''Myliobatis'' species live in warm, shallow waters. Adults prefer sandy shores, while juveniles can usually be encountered offshore.[World Register of Marine Species]
/ref>
Species
Extant species
Currently, 11 species in this genus are recognized:
Extinct species
Extinct species within this genus include:[Shark References]
/ref>
*†'' Myliobatis acutus'' Agassiz, 1843
*†'' Myliobatis affinis'' Chapman & Cudmore, 1924
*†'' Myliobatis albestii'' Pauca, 1929
*†'' Myliobatis altavillae'' Meschinelli, 1924
*†'' Myliobatis altus'' Davis, 1888
*†'' Myliobatis americanus'' Bravard, 1884
*†'' Myliobatis angustidens'' Sismonda, 1849
*†'' Myliobatis angustus'' Agassiz, 1843
*†'' Myliobatis arcuatus'' Davis, 1888
*†'' Myliobatis bellardii'' Issel, 1877
*†'' Myliobatis bilobatus'' Dartevelle & Casier, 1943
*†'' Myliobatis bisulcus'' Marsh, 1870
*†'' Myliobatis bothriodon'' White, 1926
*†'' Myliobatis canaliculatus'' Agassiz, 1843
*†'' Myliobatis colei'' Agassiz, 1843
*†'' Myliobatis crassidens'' Dartevelle & Casier, 1959
*†'' Myliobatis dimorphus'' Delfortrie, 1871
*†'' Myliobatis dispar'' Leriche, 1913
*†'' Myliobatis dixoni'' Agassiz, 1843
*†'' Myliobatis elatus'' Stromer, 1905
*†'' Myliobatis enormis'' Mendiola, 1999
*†'' Myliobatis erctensis'' Salinas, 1901
*†'' Myliobatis fastigiatus'' Leidy, 1876
*†'' Myliobatis fraasi'' Stromer, 1905
*†'' Myliobatis frangens'' Eastman, 1904
*†'' Myliobatis funiculatus'' Delfortrie, 1871
*†'' Myliobatis gigas'' Cope, 1867
*†'' Myliobatis girondicus'' Pedroni, 1844
*†'' Myliobatis goniopleurus'' Agassiz, 1843
*†'' Myliobatis granulosus'' Issel, 1877
*†'' Myliobatis haueri'' Penecke, 1884
*†'' Myliobatis holmesii'' Gibbes, 1849
*†'' Myliobatis intermedius'' Dartevelle & Casier, 1943
*†'' Myliobatis kummeli'' Fowler, 1911
*†'' Myliobatis lagaillardei'' Thomas, 1904
*†'' Myliobatis lateralis'' Agassiz, 1843
*†'' Myliobatis leidyi'' Hay, 1899
*†'' Myliobatis leognanensis'' Delfortrie, 1871
*†'' Myliobatis lepersonnei'' Dartevelle & Casier, 1959
*†'' Myliobatis llopisi'' Bauzá & Gomez Pallerola, 1982
*†'' Myliobatis marginalis'' Agassiz, 1843
*†'' Myliobatis merriami'' Jordan & Beal, 1913
*†'' Myliobatis meyeri'' Weiler, 1922
*†'' Myliobatis micropleurus'' Agassiz, 1843
*†'' Myliobatis microrhizus'' Delfortrie, 1871
*†'' Myliobatis miocenicus'' Böhm, 1942
*†'' Myliobatis mokattamensis'' Stromer, 1905
*†'' Myliobatis monnieri'' Cappetta, 1986
*†'' Myliobatis moorabbinensis'' Chapman & Pritchard, 1907
*†'' Myliobatis mordax'' Leidy, 1876
*†'' Myliobatis moutai'' Dartevelle & Casier, 1959
*†'' Myliobatis nzadinensis'' Dartevelle & Casier, 1943
*†'' Myliobatis oweni'' Agassiz, 1843
*†'' Myliobatis pachyodon'' Cope, 1867
*†'' Myliobatis pachyrhizodus'' Fowler, 1911
*†'' Myliobatis pentoni'' Woodward, 1893
*†'' Myliobatis placentinus'' Carraroli, 1897
*†'' Myliobatis plicatilis'' Davis, 1888
*†'' Myliobatis prenticei'' Chapman & Cudmore, 1924
*†'' Myliobatis raouxi'' Arambourg, 1952
*†'' Myliobatis rima'' Meyer, 1844
*†'' Myliobatis rivierei'' Sauvage, 1878
*†'' Myliobatis rugosus'' Leidy, 1855
*†''Myliobatis salentinus
''Myliobatis'' is a genus of eagle rays in the family Myliobatidae.
Description
''Myliobatis'' species can reach a width up to about . Their bodies consist of a rhomboidal disc, wider than long, with one dorsal fin. The head is broad and short, ...
'' Botti, 1877
*†'' Myliobatis semperei'' Mendiola, 1999
*†'' Myliobatis sendaicus'' Hatai, Murata & Masuda, 1965
*†'' Myliobatis serratus'' Meyer, 1843
*†'' Myliobatis sinhaleyus'' Deraniyagala, 1937
*†'' Myliobatis stokesii'' Agassiz, 1843
*†'' Myliobatis striatus'' Buckland, 1837
*†'' Myliobatis strobeli'' Issel, 1877
*†'' Myliobatis testae'' Philippi, 1846
*†'' Myliobatis tewarii'' Mishra, 1980
*†'' Myliobatis toliapicus'' Agassiz, 1843
*†'' Myliobatis transversalis'' Gibbes, 1849
*†'' Myliobatis tumidens'' Woodward, 1889
*†'' Myliobatis undulatus'' Chaffee, 1939
*†'' Myliobatis vicomicanus'' Cope, 1867
*†'' Myliobatis wurnoensis'' White, 1934
These eagle rays lived from the Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ...
to the Quaternary
The Quaternary ( ) is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS), as well as the current and most recent of the twelve periods of the ...
periods (from 70.6 to 0.012 Ma). Fossils of these fishes have been found worldwide.[
The ]extinct
Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...
species '' Myliobatis dixoni'' is known from Tertiary
Tertiary (from Latin, meaning 'third' or 'of the third degree/order..') may refer to:
* Tertiary period, an obsolete geologic period spanning from 66 to 2.6 million years ago
* Tertiary (chemistry), a term describing bonding patterns in organic ch ...
deposits along the Atlantic
The Atlantic Ocean is the second largest of the world's five oceanic divisions, with an area of about . It covers approximately 17% of Earth's surface and about 24% of its water surface area. During the Age of Discovery, it was known for se ...
seaboards of the United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
, Brazil
Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...
, Nigeria
Nigeria, officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf of Guinea in the Atlantic Ocean to the south. It covers an area of . With Demographics of Nigeria, ...
, England
England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...
, and Germany
Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
.[
]
Gallery
Image:Myliobatis aquila Réunion.jpg, ''M. aquila''
Image:Myliobatis californica pt lobos.jpg, ''M. californica''
Image:Fish4341 - Flickr - NOAA Photo Library.jpg, ''M. freminvillei''
Image:Myliobatis australis seal rocks.jpg, ''M. tenuicaudatus''
Image:TobiEIesa.jpg, ''M. tobijei''
See also
* List of prehistoric cartilaginous fish
This list of prehistoric cartilaginous fish genera is an attempt to create a comprehensive listing of all Genus, genera that have ever been included in the class chondrichthyes ''and'' are known from the fossil record. This list excludes purely v ...
References
Further reading
*
* Compagno, L.J.V. (1999): Checklist of living elasmobranchs. A: Hamlett W.C. (ed.) Sharks, skates, and rays: the biology of elasmobranch fishes., The Johns Hopkins University Press: 471-498.
*
*
* Walker, C. & Ward, D. (1993): - Fossielen: Sesam Natuur Handboeken, Bosch & Keuning, Baarn.
{{Taxonbar, from=Q965308
Ray genera
Taxa named by Georges Cuvier