Rhinolekos capetinga

Rhinolekos capetinga has its dorsal fin supported by 8 or 9 soft rays while its anal fin contains 6 soft rays. This species has an elongated body and reaches a standard length of 3.9 cm (1.5 in). It can be told apart from the other Rhinolekos species by the combination of the following characteristics: having 31 vertebrae, the front part of the compound supraneural-first dorsal-fin proximal radial touches the neural spine of the 9th vertebra, this species has no transverse dark bands on the fin rays of the pectoral, pelvic and anal fins, the row of plates on the back contains between 24 and 28 plates; there are no odontodes on the lower part of the tip of the snout; there are no accessory teeth; the prenasal is longer, the head smaller and the snout is longer.

Rhinolekos capetinga is endemicto Brazil where its kniwn distribution is restricted to two localities, both tributaries of the Tocantizinho River, part of the Tocantins River system, in the state of Goiás. The localities this species has been recorded in had clear, shallow water and medium to fast current, with these catfishes being found in and around submerged and riparian vegetation.

Rhinolekos capetinga is the classified in the genus Rhinolekos, this name combines rhinos, which is the genitive of rhis, meaning "beak" or "snout", with lekos, a "dish", "pot" or "pan", an allusion to the large plate located between second infraorbital plate and nostrils, projected forward and surrounding the nares. The specific name, capetinga, is a Tupí-Guarani word which means "white or clear water", this was an old name which had fallen into disuse for the municipality of São João d'Aliança. a location where a paratype was collected.