Thursday, 11 July 2013

Tiny New Catfish Species Found in Rio Paraíba Do Sul Basin, Brazil

July 9, 2013 — Scientists discovered a tiny new species of catfish in the waters of Rio Rio Paraíba do Sul basin, Brazil. The new species Pareiorhina hyptiorhachis belongs to a genus of armored catfishes native to South America where and found only in Brazil. These peculiar fish get their name from their strange elongated mouth barbels that remind of cat's whiskers. The new species is distinguished from others species of the genus by the presence of a conspicuous ridge on the trunk posterior to the dorsal fin (postdorsal ridge).
This image shows the newly discovered catfish
 Pareiorhina hyptiorhachis.
(Credit: Gabriel de Souza da Costa e Silva; CC-BY 3.0)

The description of the diminutive new species was published in the open access journal Zookeys.

Pareiorhina hyptiorhachis is only about 3-3.5 cm in length, making one of the smallest representatives of the catfish order. Although the new species is only the size of a decorative fish, there are even smaller representatives in the group. Some of the smallest species of Aspredinidae and Trichomycteridae for example reach sexual maturity at only 1 cm in total.

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