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

Description: A small species, maximum recorded adult size 46.4 mm SL, diagnosed by the presence of four pelvicfin rays 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; five pectoral-fin rays; six or seven opercular odontodes; 20 – 23 premaxillary teeth; 24 – 25 dentary teeth; jaw teeth always pointed; largest rays of the dorsal and anal fins longer than the respective fin bases; dorsal and anal fins rounded; head width 83.5 – 91.3 % of the head length; interorbital length 27.0 – 31.2 %; mesethmoid robust, its width at the base of cornua about four fifths of autopalatine width; metapterygoid deeper than long. Differential diagnosis Cambeva alphabelardense sp. nov. is distinguished from all other congeners by having four pelvicfin rays (vs. five rays whenever the pelvic fin is present). Differs from all other congeners, except C. betabelardense 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. Distinguished from C. betabelardense sp. nov. by having fewer pectoral-fin rays (five vs. six), fewer opercular odontodes (6 – 7 vs. 12), fewer teeth on the premaxilla (20 – 23 vs. 30 – 34) and dentary (24 – 25 vs. 30 – 34), jaw teeth always pointed (vs. anterior-most teeth incisiform), largest rays of the dorsal and anal fins longer than the respective fin bases (vs. shorter), a wider head (head width 83.5 – 91.3 % of the head length, vs. 73.7 – 78.5 %), a wider interorbital distance (27.0 – 31.2 % of the head length, vs. 21.6 – 26.2 %), a very robust mesethmoid, its width at the base of the cornua about one third of the distance between tips of cornua ( vs. about one fifth, Fig. 2 D), and a deeper metapterygoid that is subrectangular and deeper than long ( vs. subtriangular and longer than deep), (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 specific name alphabelardense: alpha, first letter of Greek alphabet; abelardense, Portuguese word referring to people born in Abelardo Luz municipality (Santa Catarina State, Brazil), the first new species described from this area [see C. betabelardense].

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Trichomycteridae

South America: Middle Rio Chapecó drainage, Rio Uruguai basin, southern Brazil. Type locality: Stream tributary to middle Rio Chapecó, Rio Uruguai basin, Abelardo Luz Municipality, Santa Catarina State, Brazil, 26°32'19"S, 52°25'17"W, elevation 850 meters.

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