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Costa, W. J. et al. 2026 (3)

Description: Cambeva dominguense differs from all other congeners by having a relatively narrow and moderately long lateral process of the parurohyal; (vs. distinctively broader and shorter). Cambeva dominguense is also distinguished from other congeners of CBS2 by having relatively long barbels, with the nasal barbel reaching the opercular patch of odontodes (vs. reaching the area just posterior to the orbit in C. betabelardense, C. insperata sp. nov. and C. intermedia sp. nov.) and the maxillary and rictal barbels reaching the area between the interopercular patch of odontodes and the pectoral-fin base (vs. reaching the interopercular patch of odontodes in C. betabelardense, C. insperata sp. nov. and C. intermedia sp. nov.); incisiform jaw teeth arranged in two or three regular rows (vs. jaw teeth sub-incisiform, with rounded extremity, irregularly arranged in C. insperata sp. nov.); 38 vertebrae (vs. 39–41 in C. insperata sp. nov.); the distance between the posterior nostril and the orbital rim about equal to the distance between the anterior and posterior nostrils (vs. two times in C. insperata sp. nov. and C. intermedia sp. nov.); the dorsal-fin origin at the vertical through the centrum of the 23rd vertebra (vs. between centra of the 19th and 21st vertebrae in all other species, except C. insperata sp. nov.); six pectoral-fin rays (vs. seven in C. intermedia sp. nov.); and presence of a rounded projection on the anterior portion of the interopercular bone (vs. absence in C. admirabilis and C. mundana sp. nov.). Habitat: Small streams about 700–725 m asl, with small pebbles and gravel on the bottom. Specimens were found buried in that bottom sediment. 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 dominguense: Refers to the occurrence of the new species in the Município of São Domingos, Estado de Santa Catarina, southern Brazil.

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Trichomycteridae

South America: Middle Rio Chapecó drainage, Rio Uruguai basin, southern Brazil.

4.5cm. (1¾ins)

22-26°c (71-79°f.)

6.0-7.0.

Costa, W. J. E. M., Feltrin, C. R. M., Amorim, P. F., Mattos, J. L. O., & Katz, A. M. (2026). A Riverine Species Flock? A Remarkably High Diversity of Endemic Fossorial Catfishes, Genus Cambeva (Siluriformes: Trichomycteridae), in a Small Mountain Drainage of Southern Brazil. Taxonomy, 6(3), 49.
Fish in the News 2026.