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Mario Pinheiro (1) A. M. Katz (1)

A new species assigned to the genus Trichomycterus (2017) but now moved into the new genus of Cambeva. Abstract: Trichomycterus comprises about 170 valid species, but its monophyly has been challenged in the last decades. Bayesian Inference and Maximum Likelihood analyses comprehending mitochondrial genes COI and CYTB and nuclear genes GLYT, MYH6 and RAG2 from 71 Trichomycterinae terminal taxa and eight outgroups were performed. The analyses highly supports a clade containing Trichomycterus nigricans, the type species of the genus, and several other congeners endemic to eastern and northeastern Brazil, herein considered as the genus Trichomycterus, the sister clade the southern Brazil and adjacent areas clade; the latter clade comprises two subclades, one comprising species of the genus Scleronema and another comprising species previously placed in Trichomycterus, herein described as a new genus. The new genus Cambeva (2020) is distinguished from all other trichomycterines by the presence of a bony flap on the channel of the maxillo-dentary ligament, the interopercle shorter than the opercle, a deep constriction on the basal portion of the antero-dorsal arm of the quadrate, absence of teeth in the coronoid process of the dentary, the maxilla shorter than the premaxilla, the cranial fontanel extending from the the medial posterior of frontal to the medial region of supraoccipital, and absence of the postorbital process of the sphenotic-prootic-pterosphenoid. Habitat: The species of Cambeva occur in the
Paraná, São Francisco, Ribeira de Iguape, and Uruguay river basins, as well as in smaller isolated coastal river basins of south-eastern and southern Brazil. Diet: will feed on most aquarium fare such as tablet, frozen and live foods. Remarks: Still found on some online sources as Trichomycterus davisi.

None

Pygidium davisi, Trichomycterus davisi

Trichomycteridae

South America: Upper Paraná River and Iguaçu and Ribeira de Iguapé River basins: Argentina and Brazil. Type locality: Serrinha Paraná, Rio Iguaçu system, Brazil.

6.5cm. (2½ins)

16-26°c (59-79°f.)

6.0-7.0.

Burgess, W.E., 1989. An atlas of freshwater and marine catfishes. A preliminary survey of the Siluriformes. T.F.H. Publications, Inc., Neptune City, New Jersey (USA).
Froese, R. and D. Pauly. Editors. 2017. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 04/2018 ).
Katz, A. M., M. A. Barbosa, J. L. O. Mattos and W. J. E. M. Costa 2018 (22 Nov.) Multigene analysis of the catfish genus Trichomycterus and description of a new South American trichomycterine genus (Siluriformes, Trichomycteridae). Zoosystematics and Evolution v. 94 (no. 2): 557-566.