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Costa, W. J. et al. 2022 (3)

Description: A small species, maximum recorded adult size 42.7 mm SL, diagnosed by the presence of a dorsal projection adjacent to the opercular odontode patch and the combination of the following features: posterior nostril about equidistant from anterior nostril and from orbit; a compact broad autopalatine, its width about equal to its length excluding anterior cartilage and postero-lateral process; presence of an anterior broad and rounded projection on the interopercle; six pectoral-fin rays; 12 opercular odontodes; 30 – 34 premaxillary teeth; 32 – 34 dentary teeth; anterior jaw teeth incisiform, posterior teeth pointed; largest rays of the dorsal and anal fins shorter than respective fin bases; dorsal and anal fins subtrapezoidal; head width 73.7 – 78.5 % of the head length; interorbital length 21.6 – 26.2 %; mesethmoid thin, its width at the base of cornua about half autopalatine width; metapterygoid longer than deep, approximately triangular. Distinguished from all other congeners, except C. alphabelardense sp. nov., by the relatively more anterior position of the orbit, making the posterior nostril nearly equidistant from anterior nostril and orbit, a compact broad autopalatine, its width about equal to its length excluding anterior cartilage (vs. width conspicuously smaller than that length), and the presence of an anterior broad and rounded projection on the interopercle (vs. never a similar projection). Distinguished from C. alphabelardense sp. nov. by having more pectoral-fin rays (six vs. five), more opercular odontodes (12 vs. 6 or 7), more teeth on the premaxilla (30 – 34 vs. 20 – 23) and dentary (32 – 34 vs. 24 – 25), anterior jaw teeth incisiform, posterior teeth pointed (vs. all teeth pointed), largest rays of the dorsal and anal fins shorter than respective fin bases (vs. longer), a narrower head (head width 73.7 – 78.5 % of the head length, vs. 83.5 – 91.3 %), a narrower interorbital distance (21.6 – 26.2 % of the head length, vs. 27.0 – 31.2 %), a thinner mesethmoid, its width at the base of the cornua about one fifth of the distance between tips of cornua (vs. about one third), and a more slender metapterygoid that is sub-triangular and longer than deep (vs. sub-rectangular and deeper than long). Also differs from all other congeners by the presence of a dorsal projection on the opercle adjacent to the odontode patch (vs. absence), (Costa, W. J. et al. 2022). Diet: will feed on most aquarium fare such as tablet, frozen and live foods. Etymology: The genus name Cambeva: vernacular name for trichomycterids in southern and southeastern Brazil, derived from the Tupi a’kãg, head, and pewa, flat, referring dorsally flattened head. The species epithet betabelardense ('beta', the second letter of the Greek alphabet, and 'abelardense', Portuguese word referring to people born in Abelardo Luz municipality) is an allusion to the second new species described for this area (the other being C. alphabelardense).

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Trichomycteridae

South America: Middle Rio Chapecó drainage, Rio Uruguai basin, southern Brazil. Type locality: Santa Catarina State, Abelardo Luz Municipality, stream tributary to middle Rio Chapecó, Rio Uruguai basin; 26°29'32'' S, 52°20'32'' W; 820 m a.s.l.

4.5cm. (1¾ins)

16-26°c (59-79°f.)

6.0-7.0.

Costa, W. J., Feltrin, C. R., & Katz, A. M. (2022). Two new remarkable and endangered catfish species of the genus Cambeva (Siluriformes, Trichomycteridae) from southern Brazil. European Journal of Taxonomy, 794(1), 140–155