Fontitrygon colarensis

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Fontitrygon colarensis
Systematics
Subclass : Plate gill (Elasmobranchii)
without rank: Stingray (batoidea)
Order : Myliobatiformes
Family : Stingrays (Dasyatidae)
Genre : Fontitrygon
Type : Fontitrygon colarensis
Scientific name
Fontitrygon colarensis
( Santos , Gomes & Charvet-Almeida , 2004)

Fontitrygon colarensis is a stingray species and lives in the mouth of the Amazon in northern Brazil and on the continental shelf in front of it.

features

Fontitrygon colarensis has a diamond-shaped pectoral fin disc that is 91 cm in diameter in females and 63 cm in males. It is rounded on the sides and runs long and pointed towards the muzzle, the muzzle of the males being slightly longer than that of the females. The whip-like tail is more than twice as long as the disc and has a poison sting on the top. The eyes are small with significantly larger injection holes behind them. The back is light brown, slightly darker towards the tail and with a lighter border on the sides. The underside is pale white, darker towards the edge of the pane. Females reach total lengths of up to 2.61 m, males up to 2.07 m

Way of life

During the tropical dry season, the ray lives in bays in shallow brackish water over a muddy bottom. In the rainy season , however, it prefers to stay away from the coast on the shelf. Little is known about its diet. Like most stingrays, it is ovoviviparous ; the young are born in litters of 1 to 4 young animals near the coast during the dry season. It is brought in as bycatch and also fished in a targeted manner on a smaller scale. The IUCN rates its status as VU (endangered) and has asked Brazil to regulate the fishing in its range.

Systematics

The ray species was only described in 2004 under the scientific name Dasyatis colarensis . When the Dasyatidae was revised in mid-2016 , the species was placed in the newly introduced genus Fontitrygon .

Individual evidence

  1. Last, PR, Naylor, GJP & Manjaji-Matsumoto, BM (2016): A revised classification of the family Dasyatidae (Chondrichthyes: Myliobatiformes) based on new morphological and molecular insights. Zootaxa , 4139 (3): 345-368. doi: 10.11646 / zootaxa.4139.3.2

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