Barbodes xouthos

from Wikipedia, the free encyclopedia
Barbodes xouthos
without rank: Otophysa
Order : Carp-like (Cypriniformes)
Subordination : Carp fish-like (Cyprinoidei)
Family : Carp fish (Cyprinidae)
Genre : Barbodes
Type : Barbodes xouthos
Scientific name
Barbodes xouthos
( Kottelat & Tan , 2011)

Barbodes xouthos ( Gr .: "Xouthos" = golden yellow) is a freshwater fish from the carp family (Cyprinidae). The only known occurrence is in the Tutong river basin in Brunei on the Southeast Asian island of Borneo .


Barbodes xouthos has a light, monochrome, yellowish-brownish colored body. A network drawing formed by the dark scale edges eyes the flanks. The ventral fins of the adult animals are yellow. Young animals have a faint black spot at the base of the dorsal fin and a central row of three to four black spots on the sides of the body. A black band runs over the dorsal fin. The dorsal fin begins above the tenth to eleventh scales of the eleven to twelve scales along the sideline . Their last unbranched and the first branched fin rays are significantly longer than the subsequent fin rays. The last unbranched fin ray is serrated at its rear edge with 32 to 37 serrations. The last unbranched and the first branched fin rays of the anal fin are also longer and form a point, which is particularly noticeable in larger specimens. The caudal fin is deeply forked, the long lobes end pointed.

The specimens examined for the first description had body lengths of 4.2 to 9.5 cm. The head length is 28.3 to 31.2% of the standard length , the height of the tail fin stem is 16.4 to 16.2% of the standard length. A row of scales around the tail fin stalk has twelve scales. The tail fin stalk is 1.1 to 1.2 times longer than it is high. Sitting on the muzzle two pairs of long maxillary - Barteln , one of which extends up to the second half of the second eye beyond. On the first gill arch there are 23 gill trap rays . The outer edges of the dorsal and anal fins are concave, the pectoral fins sickle-shaped, the pelvic fins slightly sickle-shaped.


Barbodes xouthos lives as a schooling fish in black water rivers and streams with a very low pH value (4.5 to 5.0) and soft soils.


Barbodes xouthos was described in 2011 by the Swiss ichthyologist Maurice Kottelat and his Singaporean colleague Tan Heok Hui as Systomus xouthos and assigned to the genus Barbodes in November 2013 . Within Barbodes , it is closely related to the spotted barbel ( Barbodes binotatus ), which is widespread in Southeast Asia .


Web links