Hidden_angelshark

Hidden angelshark

Hidden angelshark

Species of shark

The hidden angelshark (Squatina occulta) is a species of angelshark that was named by Carolus Maria Vooren and Kleber Grübel da Silva in 1991. It inhabits the Atlantic coastline of South America from southern Brazil to Argentina.[2] Hidden angel sharks grow up to 124 cm in length and are ovoviviparous, meaning the embryos develop inside eggs that remain inside the mother's body until they are ready to hatch.[3][4]

Quick Facts Conservation status, Scientific classification ...

Size

This species reaches a length of 120 cm (47 in).[5]

Differences

The hidden angelshark differs from other species of angelshark due to the size of its neurocranial measurements. Its rostral region is considerably short compared to its counterparts. Its neurocraniam is its widest at the outer corners of its nasal capsules and post-orbital processes. The hidden angelshark's configuration is very similar to that of a ray, the one major difference is the shark's gills, which lie edgewise of the head. [6]

Residence

Although there are many speculations as to where this species resides, studies show they are found in Puerto Quequén, Necochea, Buenos Aires Province, Argentina.

References

  1. [1]
    Awruch, C.A.; Barreto, R.; Charvet, P.; Chiaramonte, G.E.; Cuevas, J.M.; Dolphine, P.; Faria, V.; Paesch, L.; Rincon, G. (2019). "Squatina occulta". IUCN Red List of Threatened Species. 2019: e.T39331A2899669. doi:10.2305/IUCN.UK.2019-1.RLTS.T39331A2899669.en. Retrieved 18 November 2021.
  2. [2]
    Carvalho-Filho, A., 1992. Peixes: costa Brasileira. Marca D'Agua, Sao Paolo, Brazil. 304 p.
  3. [3]
    Dulvy, N.K. and J.D. Reynolds, 1997. Evolutionary transitions among egg-laying, live-bearing and maternal inputs in sharks and rays. Proc. R. Soc. Lond., Ser. B: Biol. Sci. 264:1309-1315.
  4. [4]
    Menni, R.C. and L.O. Lucifora, 2007. Condrictios de la Argentina y Uruguay. ProBiota, FCNyM, UNLP, Serie Técnica-Didáctica, La Plata, Argentina, 11:1-15. (Spanish)
  5. [5]
    Froese, Rainer; Pauly, Daniel (eds.) (2015). "Squatina occulta" in FishBase. February 2015 version.
  6. [6]
    Carvalho, M. R., Gomes, U. L., & Caio Faro. (2010, December 22). Comparative neurocranial morphology of angelsharks from the south‐western Atlantic Ocean (Chondrichthyes, Elasmobranchii, Squatinidae): Implications for taxonomy and phylogeny. Retrieved from https://onlinelibrary.wiley.com/doi/full/10.1111/j.1463-6395.2010.00495.x

Estalles, Maria Lourdes, et al. “The Southernmost Range Limit for the Hidden Angelshark Squatina Occulta.” Marine Biodevirsity Records, Esatalles, 1 Aug. 2016, link.springer.com/content/pdf/10.1186/s41200-016-0066-x.pdf.


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