Myliobatis

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Myliobatis
Temporal range: 65–0  Ma
O
S
D
C
P
T
J
K
Pg
N
Danian to present [1]
Myliobatis californica monterey bay aquarium.jpg
Myliobatis californica
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Order: Myliobatiformes
Family: Myliobatidae
Genus: Myliobatis
Cuvier, 1816
Type species
Myliobatis aquila
(Linnaeus, 1758)
Species

See text

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

Contents

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 lasts about six months, and a female produces four to seven embryos. Myliobatis species mainly feed on molluscs, bottom-living crustaceans, and small fishes. [4]

Habitat

Myliobatis 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]

ImageScientific nameCommon NameDistribution
Myliobatis aquila.jpg Myliobatis aquila (Linnaeus, 1758)common eagle rayAtlantic Ocean (North Sea to South Africa), the Mediterranean Sea and the south-western Indian Ocean.
New zealand eagle ray at jackett island.jpg Myliobatis australis Macleay, 1981Australian bull rayEastern Indian Ocean: southern Australia, from Western Australia to Queensland. [6]
Myliobatis californica monterey bay aquarium.jpg Myliobatis californica T. N. Gill, 1865bat eagle rayeastern Pacific Ocean, between the Oregon coast and the Gulf of California.
Myliobatis chilensis.jpg Myliobatis chilensis Philippi {Krumweide}, 1893Chilean eagle raycoasts of Chile and Peru
Fish4341 - Flickr - NOAA Photo Library.jpg Myliobatis freminvillei Lesueur, 1824bullnose eagle rayfrom Cape Cod down to Argentina
Myliobatis goodei, Southern eagle ray, topside.png Myliobatis goodei Garman, 1885southern eagle rayAtlantic coast, from the tip of Florida down to Argentina
Myliobatis hamlyni.jpg Myliobatis hamlyni J. D. Ogilby, 1911purple eagle ray [7] Australia, Indonesia, the Philippines, Taiwan and Okinawa
Myliobatis longirostris Applegate & Fitch, 1964snouted eagle rayPacific Ocean from Baja California and the Gulf of California to Sechura, Peru
Myliobatis peruvianus Garman, 1913Peruvian eagle rayPacific Ocean off Chile and Peru.
Myliobatis ridens Ruocco, Lucifora, Díaz de Astarloa, Mabragaña & Delpiani, 2012shortnose eagle ray [8] southwestern Atlantic Ocean off Brazil and Argentina.
New zealand eagle ray at jackett island.jpg Myliobatis tenuicaudatus Hector, 1877Australian/New Zealand eagle raynear rocky reefs around New Zealand and southern Australia
TobiEIesa.jpg Myliobatis tobijei Bleeker, 1854Japanese eagle ray [7] Indonesia and the Philippines,Japan, Korea, and China.

Extinct species

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


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. 1 2 Froese, Rainer; Pauly, Daniel (eds.). "Species in genus Myliobatis". FishBase . July 2017 version.
  3. 1 2 3 Discover life
  4. 1 2 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. 1 2 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.[ permanent dead link ]
  9. 1 2 3 Shark References

Further reading