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 freshwater stingray species native to Brazil, the type species of its genus. Some of the features of Heliotrygon include its disc proportions (a disc that is very circular and anteriorly convex), the extreme subdivision of its suborbital canal, a triangular pelvic girdle, a reduced caudal sting, a basibranchial copula with a thin and acute anterior extension, as well as precerebral and frontoparietal fontanellae of approximately equal width.

Description

The ray can has a unique dorsal color pattern, made up by a uniform gray to light brown colour. 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.

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”."

External Links

• Heliotrygon gomesi at the Encyclopedia of Life
• FishBase