Trichogenes claviger, the Caetés catfish, is a critically endangered species of pencil catfish native to the Atlantic Forest of Brazil. It was discovered early in 2010 and scientifically described later that year. One of three species within the genus Trichogenes, it is restricted to an area of 16 km2 (6.2 sq mi) in the Caetés forest, a mountainous area in the Brazilian state of Espírito Santo. When discovered, the rainforest in which it occurs was unprotected and threatened by deforestation. A private nature reserve has since been established, allowing visitors to see the fish in its habitat. A small fish, T. claviger is up to 50.8 mm (2.00 in) in length. A series of black dots runs along the side of the body, distinguishing it from related species. Males have a bony protrusion from the gill area (the opercular process) that is elongated and club-like, a feature that inspired the name of the species (claviger – 'club-bearing'). (Full article...).
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