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

Description: Cambeva diegoi is distinguished from all other species of CBS1 by the absence of pelvic fin and girdle (vs. presence); 39 vertebrae (vs. 36–38); ten branchiostegal rays (vs. seven or eight); 16 interopercular odontodes (vs. 22–37); and 45 dentary teeth (vs. 22–40). Habitat: Headwaters of a small brook, about 1075 m asl, with fine gravel, small pebbles and leaf litter on the bottom. The specimens were found buried in fine gravel deposited on the bottom of a small pool-like area within the brook channel. 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 diegoi: In honour of Diego da Silva, who first collected fishes in Campina da Alegria at the type locality of this new species.

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Trichomycteridae

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

4.5cm. (2ins)

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.