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Myliobatis

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Myliobatis is a genus of eagle rays in the family Myliobatidae.

Description

Myliobatis species can reach a width up to about 1.8 m (6 ft).[2] 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.[3]

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.[3]

Biology

Myliobatis species are ovoviviparous. Their gestation last about 6 months and a female produces four to seven embryos. Myliobatis species mainly feed on molluscs, bottom-living crustaceans, and small fishes.[4]

Habitat

Mylobatis species live in warm, shallow waters. Adults prefer sandy shores, while juveniles can usually be encountered offshore.[3][4]

Species

Extant species

Currently, 11 species in this genus are recognized:[2][5]

Extinct species

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Fossil tooth or plate of M. dixoni from Khouribga (Morocco), 55-45 Mya

Extinct species within this genus include:[9]

These eagle rays lived from the Cretaceous to the Quaternary periods (from 70.6 to 0.012 Ma). Fossils of these fishes have been found worldwide.[9]

The extinct species Myliobatis dixoni is known from Tertiary deposits along the Atlantic seaboards of the United States, Brazil, Nigeria, England, and Germany.[9]

Gallery

See also

References

  1. ^ Sepkoski, J. (2002). "A compendium of fossil marine animal genera (Chondrichthyes entry)". Bulletins of American Paleontology. 364: 560. Archived from the original on 2012-05-10.
  2. ^ a b Froese, Rainer and Pauly, Daniel, eds. (2017). Species of Myliobatis in FishBase. July 2017 version.
  3. ^ a b c Discover life
  4. ^ a b World Register of Marine Species
  5. ^ White, W.T. (2014). "A revised generic arrangement for the eagle ray family Myliobatidae, with definitions for the valid genera". Zootaxa. 3860 (2): 149–166. doi:10.11646/zootaxa.3860.2.3. PMID 25283197.
  6. ^ "Myliobatis australis | Shark-References".
  7. ^ a b White, W.T.; Kawauchi, J.; Corrigan, S.; Rochel, E.; Naylor, G.J.P. (2015). "Redescription of the eagle rays Myliobatis hamlyni Ogilby, 1911 and M. tobijei Bleeker, 1854 (Myliobatiformes: Myliobatidae) from the East Indo-West Pacific". Zootaxa. 3948 (3): 521–548. doi:10.11646/zootaxa.3948.3.7. PMID 25947786.
  8. ^ Ruocco, N.L.; Lucifora, L.O.; de Astarloa, J.M.D.; Mabragaña, E.; Delpiani, S.M. (2012). "Morphology and DNA barcoding reveal a new species of eagle ray from the Southwestern Atlantic: Myliobatis ridens sp. nov. (Chondrichthyes, Myliobatiformes, Myliobatidae)" (PDF). Zoological Studies. 51 (6): 862–873.
  9. ^ a b c Shark References
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Myliobatis: Brief Summary

provided by wikipedia EN

Myliobatis is a genus of eagle rays in the family Myliobatidae.

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN