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Costa et al. 2022 (2)

Colouration: Larger adult specimens above about 50 mm SL: flank and dorsum light brownish yellow, with three longitudinal rows of round black spots, one along the dorsum midline, one along the flank midline, and one on the dorsal part of flank; black rows frequently united by melanophores to form longitudinal stripe. Melanophores are concentrated on the flank area just posterior and above the pectoral-fin base for black humeral blotch. No distinctive black spots on the zone below the lateral midline posterior to humeral blotch, but melanophores are weakly dispersed on the ventral portion of the caudal peduncle. Venter yellowish white. The headlight is brownish yellow, with superficial melanophores scattered over lateral and dorsal surfaces, more concentrated above the opercle and interopercle and between nares; orangish yellow pigmentation concentrated around the orbit, snout, and below opercle; transverse series of short black lines on a postero-ventral portion of interopercle. The barbel’s are grey, and nasal barbels are darker. Iris bluish silver. Fins hyaline with dark yellow bases impregnated with superficial melanophores. Specimens between about 30 and 50 mm SL: similar to larger specimens, except for the presence of rows of bluish silver spots alternated with black spots. Juvenile specimens between about 15 and 30 mm SL: flank and dorsum light grey, with three black stripes, one along the dorsum midline, one along the flank midline, and one on the dorsal part of the flank. Venter white. The lateral and ventral portions of the head are light grey, the dorsal portion is black. Nasal barbel dark grey, maxillary, and rictal barbels white. Iris bluish silver. Fins hyaline, (Costa et al. 2022). Habitat: Presently known from a single locality in the Rio Roncador, a tributary of Lagoa de Saquarema, at about 90 m asl. substrate, whereas the few larger specimens were found buried in the muddy substrate. The area is situated in a mosaic of original forest remnants and lands used for agricultural purposes, (Costa et al. 2022). Diet: Will feed on most aquarium fare such as tablet, frozen and live foods. It is an opportunistic predator that mainly feeds on insects, but also will take small crustaceans and plant material (algae and remains of phanerogams). Etymology: The name saquarema refers to the occurrence of the new species in the Lagoa de Saquarema system. The word saquarema is derived from the Tupi-Guarani, but its meaning is not clear.

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Trichomycteridae

South America: Rio Roncador drainage, Paraíba do Sul River basin, Rio de Janeiro State, south-eastern Brazil. Type Locality: Presently known from a single locality in the Rio Roncador, a tributary of Lagoa de Saquarema, at about 90 m asl.

5.5cm. (2¼ins)

24-27°c (75-81°f.)

6.0-7.0.

Barbosa, M.A. and W.J.E.M. Costa, 2012. Trichomycterus puriventris (Teleostei: Siluriformes: Trichomycteridae), a new species of catfish from the rio Paraíba do Sul basin, southeastern Brazil. Verteb. Zool. 62(2):155-160.
Costa, W.J.E.M.; Mattos, J.L.; Vilardo, P.J.; Amorim, P.F.; Katz, A.M. Perils of Underestimating Species Diversity: Revisiting Systematics of Psammocambeva Catfishes (Siluriformes: Trichomycteridae) from the Rio Paraíba do Sul Basin, South-Eastern Brazil †. Taxonomy 2022. 2, 491-523.