Heliotrygon gomesi

Gomes's round ray
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Order: Myliobatiformes
Family: Potamotrygonidae
Genus: Heliotrygon
Species: H. gomesi
Binomial name
Heliotrygon gomesi
M. R. de Carvalho & Lovejoy, 2011

Heliotrygon gomesi, the Gomes's round ray or China ray, is a species of freshwater stingray native to the western Amazon basin in South America.[1][2] It is the type species of its genus.[1] It spends the day in deep river channels, but moves closer to the shore at night to feed.[3]

Description

This ray reaches a disc width up to 58 cm (23 in).[3] It is uniform gray to light brown above and it lacks any distinctive patterns. In addition to the lack of pattern, this species differs from H. rosai by showing a slender tail width at its base, a slightly larger preorbital snout length, and a proportionally smaller pelvic inner length. It shows angular cartilages.[1] Both species of Heliotrygon have greatly reduced stings, rendering them virtually harmless.[2]

References

  1. 1 2 3 de Carvalho, M.R. and N.R. Lovejoy, 2011. Morphology and phylogenetic relationships of a remarkable new genus and two new species of Neotropical freshwater stingrays from the Amazon basin (Chondrichthyes: Potamotrygonidae). Zootaxa 2776:13-48.
  2. 1 2 Wheeler, Quentin. "New to Nature No 37: Heliotrygon stingrays". The Guardian. The Guardian. Retrieved 30 August 2015.
  3. 1 2 Last; White; de Carvalho; Séret; Stehmann; and Naylor, eds. (2016). Rays of the World. CSIRO. pp. 620–623. ISBN 9780643109148.

Further reading

  • Ballantyne, J. S., and D. I. Fraser. "Euryhaline elasmobranchs." Fish Physiology: Euryhaline Fishes: Fish Physiology 32 (2013): 125-198.
  • Fehlauer‐Ale, Karin H., and D. Timothy J. Littlewood. "Molecular phylogeny of Potamotrygonocotyle (Monogenea, Monocotylidae) challenges the validity of some of its species." Zoologica Scripta 40.6 (2011): 638-658.
  • Orsén, Ludvig. "Potamotrygonidae, broskfiskarnas” outsider”."
  • Heliotrygon gomesi at the Encyclopedia of Life Edit this at Wikidata
  • "Heliotrygon gomesi". Integrated Taxonomic Information System. Retrieved 30 August 2015.
  • FishBase
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