Currently five species of Cambeva have been
reported to occur in the Paranapanema river drainage:
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. 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).
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. 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.
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
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).