Fluvitrygon kittipongi
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Fluvitrygon kittipongi |
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| ( Vidthayanon & Roberts , 2005) |
Fluvitrygon kittipongi is a small, in the Mae Klong and the Chao Phraya in western and central parts of the central region of Thailand, and possibly also in Pahang on the Malay Peninsula in Malaysia occurring stingray .
features
Fluvitrygon kittipongi is similar to Fluvitrygon signifer , but remains significantly smaller with a maximum width of the body disc of 28.5 cm and has a different color. The body disc is only a few longer than it is wide. The upper side of the body disc and the pelvic fins are monochrome gray, tan or orange-brown, the underside is whitish, their edge black. In the middle of the back there are some enlarged thorns. A row of thorns extends from there to the base of the tail spine. The eyes are smaller than the teardrop-shaped spray holes . The small teeth are arranged in 4 or 5 rows in the upper jaw and in 14 or 15 rows in the lower jaw. The teeth are usually white, while the outer teeth of older specimens are orange-brown. The tail is without skin folds and has one or two spines. The tail of all specimens examined for the initial description was not complete, possibly a result of attacks by puffer fish ( Pao cf. leiurus and Dichotomyctere . Cf. nigroviridis ).
Habitat and endangerment
Fluvitrygon kittipongi lives in pure fresh water in river sections above the influence of the tides. The ray species seems to prefer river sections with sandy or sandy-muddy subsoil, while Fluvitrygon occurs more significantly on muddy soils. Since the species is often caught as bycatch in the heavily fished and polluted rivers , the distribution area is less than 5000 km² and it is only known from two or three locations, it is considered endangered.
Systematics
The ray species was first scientifically described in 2005 by the Thai ichthyologist Chavalit Vidthayanon and his American colleague Tyson R. Roberts under the name Himantura kittipongi and named after the fish exporter Khun Jarutan Kittipong, who caught the five type specimens that are examined for the first description Has. In 2016, the genus Fluvitrygon was introduced for three Southeast Asian freshwater ray species .
supporting documents
- ↑ a b Fluvitrygon kittipongi in the endangered Red List species the IUCN 2016 Posted by: Vidthayanon, C. & Manjaji, M., 2007. Retrieved on 8 November of 2019.
- ↑ a b 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 , page 360.
- ^ A b C. Vidthayanon & TR Roberts (2005). Himantura kittipongi , a new species of freshwater whiptail stingray from the Maekhlong River of Thailand (Elasmobranchii, Dasyatididae). Natural History Bulletin of the Siam Society. 53 (1): 123-132. PDF
Web links
- Fluvitrygon kittipongi on Fishbase.org (English)