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

Description: Cambeva mundana differs from all other species of CBS2, except C. intermedia, by a colour pattern consisting of small dots on the whole flank (vs. large blotches). Cambeva mundana is distinguished from C. intermedia by having relatively long barbels, with the nasal barbel reaching the opercular patch of odontodes (vs. reaching the area just posterior to the orbit) 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); the distance between the posterior nostril and the orbital rim about equal to the distance between the anterior and posterior nostrils (vs. two times); and six pectoral-fin rays (vs. seven). Cambeva mundana is also distinguished from all other congeners of CBS2, except C. admirabilis, by the absence of a rounded projection on the anterior portion of the interopercular bone (vs. presence); and presence of a U-shaped concavity in the posterior portion of the dorsal margin of the hyomandibula anterior outgrowth (vs. absence). Cambeva mundana also differs from C. admirabilis by having well-developed pelvic fin (vs. pelvic fin absent or rudimentary). Habitat: Headwaters of a small stream, about 775 m asl. Specimens were found below small pebbles and gravel on the bottom. 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 mundana: From the Latin mundana (worldly, common), referring to the colour pattern of the flank that is common among congeners, making difficult its recognition using only colour pattern characters.

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Trichomycteridae

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

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.