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A. M. Katz (3)

Description: Currently five species of Cambeva have been reported to occur in the Paranapanema river drainage: C. davisi, C. diabola, C. guareiensis, C. pascuali and C. perkos (Datovo, Carvalho & Ferrer, 2012). Although phylogenetic relationships among species of Cambeva are still unknown and osteological data for most taxa are not available, C. guareiensis seems to be more closely related to C. davisi and C. cubataonis by these three species sharing a unique morphology of autopalatine consisting of a deep constriction on the mesial margin of the autopalatine, with the anterior part of the margin nearly straight and the posterior prominent and rounded. In other taxa that constriction is absent. Cambeva guareiensis is readily distinguished from C. davisi by the relative position of the urogenital papillae that is situated in the vertical through the centrum of 21st–22th vertebrae (vs. 23th–24th in C. davisi), and by the presence of eight branchiostegal rays (vs. nine to eleven). In addition, these two species may be easily distinguished by their adult colour pattern, with C. guareiensis having round dark brown spots over flank highly contrasting with the yellow colour ground, whereas in C. davisi there are minute brown spots highly overlapped over flank, weakly contrasting with the yellowish-brown colour ground. Habitat: The species of Cambeva occur in the Paraná, São Francisco, Ribeira de Iguape, and Uruguay river basins, as well as in smaller isolated coastal river basins of south-eastern and southern Brazil. Colouration: Flank yellow with dark rounded brown spots, larger and more concentrated on dorsal half of flank and whole peduncle caudal side, their diameter twice or more eye diameter. (Katz, A.M. & Costa, W.J.E.M., 2020). Diet: will feed on most aquarium fare such as tablet, frozen and live foods. Etymology: The name guareiensis refers to the occurrence of the new species in the Guareí river drainage, a noun in apposition.

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Trichomycteridae

South America: Upper Paranapanema River drainage, upper Paraná basin, São Paulo State, Brazil. Type locality: Small stream tributary to the Guareí River, tributary of upper section of the Paranapanema river drainage, Paraná river basin.

5.0cm. (2ins)

16-26°c (59-79°f.)

6.0-7.0.

Katz, A.M. & Costa, W.J.E.M., 2020 " A new species of the catfish genus Cambeva from the Paranapanema river drainage, southeastern Brazil (Siluriformes: Trichomycteridae)" (Tropical Zoology, Vol. 33 No. 1).