Tuesday, August 7, 2012

[Ichthyology • 2011] Baryancistrus chrysolomus & B. xanthellus • Two new ornamental loricariid catfishes of Baryancistrus (Siluriformes: Loricariidae) from rio Xingu drainage, Brazil


Baryancistrus chrysolomus 
Rapp Py-Daniel, Zuanon & R. R. de Oliveira, 2011

Abstract
Two new species of the hypostomine genus Baryancistrus are described from the rio Xingu drainage. Baryancistrus xanthellus is distinguished from all other Baryancistrus species by the presence of yellow spots along the entire body and conspicuous yellow marks on distal tip of dorsal and caudal fins. Baryancistrus chrysolomus is distinguished from its congeners by its uniform dark body coloration and presence of yellow bands on dorsal and caudal fins. Despite the lack of formal description, these species are very popular in the international aquarium trade. We expect that these formal descriptions might contribute to the improvement of Brazilian regulations in the international trade of ornamental loricariids.

Key words: Amazon fishes, Aquarium trade, Belo Monte, Taxonomy.



Baryancistrus chrysolomus 
Rapp Py-Daniel, Zuanon & R. R. de Oliveira, 2011


Distribution. Known from rio Xingu, in the area called Volta Grande do rio Xingu, immediately above Belo Monte falls and below Belo Monte village, and from rio Curuá, rio Iriri, the larger tributary of rio Xingu (Figs. 3).
Etymology. From the Greek chryso, meaning orange or yellow and loma meaning border, in allusion to the colored band at the border of the dorsal and caudal fins. A noun in apposition.
Popular name. This species is commonly known in the Brazilian aquarium trade as "aba laranja", (orange border), "cascudo Magnum", (large pleco), or L047. In English, this fish receives the name of mango pleco.

Golden nugget pleco | Baryancistrus xanthellus 
Rapp Py-Daniel, Zuanon & R. R. de Oliveira, 2011 

Etymology. From the Greek xanthellus, yellow, in allusion to the bright color of the specimens. A noun in apposition.


Two new ornamental loricariid catfishes of Baryancistrus from rio Xingu drainage (Siluriformes: Hypostominae)

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