Abstract
Trichomycterus tetuanensis, new species, is described from the río Tetuan, upper río Magdalena basin in Colombia. The new species is distinguished by its margin of caudal fin conspicuously emarginate, in combination with a high number of opercular odontodes (21–39), reflected externally in the large size of the opercular patch of odontodes, 3 irregular rows of conic teeth in the upper jaw, 42–52 interopercular odontodes, 8 branchiostegal rays, 37 post Weberian vertebrae, 7 branched pectoral-fin rays, hypural 3 separated from hypural plate 4+5, and background coloration light brown with darker dots uniformly sparse on dorsum and sides of trunk. Some apomorphic characters informative for the phylogenetic affinities of the new species within Trichomycterus are discussed.
References
Arratia, G. (1990) The South American Trichomycterinae (Teleostei: Siluriformes), a problematic group. In: Peters, G. & Hutterer, R. (Eds.), Vertebrates in the Tropics. Museum Alexander Koenig, Bonn, pp. 395–403.
Arratia, G. (1998) Silvinichthys, a new genus of trichomycterid catfishes from the Argentinian Andes, with redescription of Trichomycterus nigricans, Ichthyological Exploration of Freshwaters, 9, 347–370.
Arratia, G. & Huaquin, L. (1995) Morphology of the lateral line system and of the skin of diplomystid and certain primitive loricarioid catfishes and systematic and ecological considerations. Bonner Zoologische Monographien, 36, 1–110.
Arratia, G. & Menu-Marque, S. (1984) New catfishes of the genus Trichomycterus from the high Andes of South America (Pisces, Siluriformes) with remarks on distribution and ecology. Zoologische Jahrbücher. Abteilung für Systematik, Ökologie und Geographie der Tiere, 111, 493–520.
Barbosa, M.A. & Costa, W.J.E.M. (2010) Seven news species of catfish genus Trichomycterus (Teleostei: Siluriformes: Trichomycteridae): from southeastern Brazil and re-description of T. brasiliensis. Ichthyological Exploration of Freshwaters, 21, 97–122.
Baskin, J.N. (1973) Structure and relationship of the Trichomycteridae. Unpublished Ph.D. Dissertation, City University of New York, New York, 389 pp.
Bockmann, F.A. & Sazima, I. (2004) Trichomycterus maracaya, a new catfish from the upper rio Paraná, southeastern Brazil (Siluriformes: Trichomycteridae), with notes on the T. brasiliensis species-complex, Neotropical Ichthyology, 2, 61–74.
http://dx.doi.org/10.1590/S1679-62252004000200003Costa, W.J.E.M. & Bockmann, F.A. (1993) Un nouveau genre néotropical de la famille des Trichomycteridae (Siluriformes: Loricarioidei), Revue Française d'Aquariologie et Herpétologie, 20, 43–46.
Datovo, A. & Bockmann, F.A. (2010) Dorsolateral head muscles of the catfish families Nematogenyidae and Trichomycteridae (Siluriformes: Loricarioidei): comparative anatomy and phylogenetic analysis. Neotropical Ichthyology, 8, 193–246.
http://dx.doi.org/10.1590/S1679-62252010000200001DoNascimiento, C. (2013) Sistemática y relaciones filogenéticas de la subfamilia de bagres parásitos Stegophilinae (Siluriformes, Trichomycteridae). Unpublished Doctoral thesis, Universidad Central de Venezuela, Caracas, 343 pp.
http://dx.doi.org/10.13140/2.1.1056.5442.
DoNascimiento, C. (2015) Morphological evidence for the monophyly of the subfamily of parasitic catfishes Stegophilinae (Siluriformes, Trichomycteridae) and phylogenetic diagnoses of its genera. Copeia, 103, 933–960.
http://dx.doi.org/10.1643/CI-14-132DoNascimiento, C., Prada-Pedreros, S. & Guerrero-Kommritz, J. (2014a) Trichomycterus venulosus (Steindachner, 1915), a junior synonym of Eremophilus mutisii Humboldt, 1805 (Siluriformes: Trichomycteridae) and not an extinct species. Neotropical Ichthyology, 12, 707–715.
http://dx.doi.org/10.1590/1982-0224-20130236DoNascimiento, C., Prada-Pedreros, S. & Guerrero-Kommritz, J. (2014b) A new catfish species of the genus Trichomycterus (Siluriformes: Trichomycteridae) from the río Orinoco versant of Páramo de Cruz Verde, Eastern Cordillera of Colombia. Neotropical Ichthyology, 12, 717–728.
http://dx.doi.org/10.1590/1982-0224-20140005Dutra, G.M., Wosiacki, W.B. & de Pinna, M.C.C. (2012) Trichomycterus anhanga, a new species of miniature catfish related to T. hasemani and T. johnsoni (Siluriformes: Trichomycteridae) from the Amazon basin, Brazil. Neotropical Ichthyology, 10, 225–231.
http://dx.doi.org/10.1590/S1679-62252012000200001Eigenmann, C.H. (1918) The Pygidiidae, a family of South American catfishes. Memoirs of the Carnegie Museum, 7, 259–398.
Eschmeyer, W.N. & Fong, J.D. (2016) Species by family/subfamily. Electronic version. Available from: http://research.calacademy.org/research/ichthyology/catalog/SpeciesByFamily.asp (accessed 21 April 2016)
Fernández, L. & Miranda, G. (2007) A catfish of the genus Trichomycterus from a thermal stream in southern South America (Teleostei, Siluriformes, Trichomycteridae), with comments on relationships within the genus. Journal of Fish Biology, 71, 1303–1316.
http://dx.doi.org/10.1111/j.1095-8649.2007.01589.xFernández, L. & de Pinna, M.C.C. (2005) Phreatic catfish of the genus Silvinichthys from southern South America (Teleostei, Siluriformes, Trichomycteridae). Copeia, 2005, 100–108.
http://dx.doi.org/10.1643/CI-03-158R2Fernández, L. & Vari, R.P. (2009) New species of Trichomycterus from the Andean Cordillera of Argentina (Siluriformes: Trichomycteridae). Copeia, 2009, 195–202.
http://dx.doi.org/10.1643/CI-08-083Fernández, L. & Vari, R.P. (2012) New species of Trichomycterus (Teleostei: Siluriformes) from the Andean Cordillera of Argentina and the second record of the genus in thermal waters. Copeia, 2012, 631–636.
http://dx.doi.org/10.1643/CI-12-035Ferrer, J. & Malabarba, L.R. (2013) Taxonomic review of the genus Trichomycterus Valenciennes (Siluriformes: Trichomycteridae) from the laguna dos Patos system, Southern Brazil. Neotropical Ichthyology, 11, 217–246.
http://dx.doi.org/10.1590/S1679-62252013000200001García-Melo, L.J. (2009) Relaciones filogenéticas de Trichomycterus (Siluriformes: Trichomycteridae) en el alto Magdalena. M.Sc. dissertation, Universidad del Tolima, Ibagué, Colombia, 171 pp.
Lima, S.M.Q., Lazzarotto, H. & Costa, W.J.E.M. (2008) A new species of Trichomycterus (Siluriformes: Trichomycteridae) from lagoa Feia drainage, southeastern Brazil. Neotropical Ichthyology, 6, 315–322.
http://dx.doi.org/10.1590/S1679-62252008000300004Lundberg, J.G. & Baskin, J.N. (1969) The caudal skeleton of the catfishes, Order Siluriformes. American Museum Novitates, 2398, 1–49.
Maldonado-Ocampo, J., Ortega-Lara, A., Usma Oviedo, J.S., Vergara, G.G., Villa-Navarro, F.A., Gamboa, L.V., Prada-Pedreros, S. & Rodríguez, C.A., (2005) Peces de los Andes de Colombia. Instituto de Investigación de Recursos Biológicos Alexander von Humboldt. Bogotá, D.C., Colombia, 346 pp.
Myers, G.S. (1944) Two extraordinary new blind nematognath fishes from the Rio Negro, representing a new subfamily of Pygidiidae, with a rearrangement of the genera of the family and illustrations of some previously described genera and species from Venezuela and Brazil. Proceedings of the California Academy of Sciences, Series 4, 23, 591–602.
de Pinna, M.C.C. (1989) A new sarcoglanidine catfish, phylogeny of its subfamily, and an appraisal of the phyletic status of the Trichomycterinae (Teleostei, Trichomycteridae). American Museum Novitates, 2950, 1–25.
de Pinna, M.C.C. (1992) Trichomycterus castroi, a new species of trichomycterid catfish from the Rio Iguaçu of Southeastern Brazil (Teleostei: Siluriformes). Ichthyological Exploration of Freshwaters, 3, 89–95.
de Pinna, M.C.C. (1998) Phylogenetic relationships of Neotropical Siluriformes (Teleostei: Ostariophysi): historical overview and synthesis of hypotheses. In: Malabarba, L.R., Reis, R.E., Vari, R.P., Lucena, Z.M.S. & Lucena, C.A.S. (Eds.), Phylogeny and Classification of Neotropical Fishes. EDIPUCRS, Porto Alegre, pp. 279–330.
de Pinna, M.C.C. & Wosiacki, W. (2003) Trichomycteridae. In: Reis, R.E., Kullander, S.O. & Ferraris, C.J. Jr. (Eds.), Check list of the Freshwater Fishes of South and Central America. EDIPUCRS, Porto Alegre, pp. 270–290.
Sabaj Pérez, M.H. (Ed.) (2014) Standard symbolic codes for institutional resource collections in herpetology and ichthyology: an online reference. Version 5.0. Available from: http://www.asih.org/ (accessed 4 May 2016)
Schaefer, S.A. & Aquino, A.E. (2000) Postotic laterosensory canal and pterotic branch homology in catfishes. Journal of Morphology, 246, 212–227.
http://dx.doi.org/10.1002/1097-4687(200012)246:3%3C212::AID-JMOR5%3E3.0.CO;2-SSchaefer, S.A. & Fernández, L. (2009) Redescription of the pez graso, Rhizosomichthys totae (Trichomycteridae), of Lago de Tota, Colombia, and aspects of cranial osteology revealed by microtomography. Copeia, 2009, 510–522.
http://dx.doi.org/10.1643/CI-08-186Taylor, W.R. & Van Dyke, G. (1985) Revised procedures for staining and clearing small fishes and other vertebrates for small bone and cartilage study. Cybium, 9, 107–119.
Tchernavin, V.V. (1944) A revision of some Trichomycterinae based on material preserved in the British Museum (Natural History). Proceedings of the Zoological Society of London, 114, 234–275.
http://dx.doi.org/10.1111/j.1096-3642.1944.tb00219.xWosiacki, W.B. (2005) A new species of Trichomycterus (Siluriformes: Trichomycteridae) from south Brazil and redescription of T. iheringi (Eigenmann). Zootaxa, 1040, 49–64.
Wosiacki, W.B. & de Pinna, M.C.C. (2008a) Trichomycterus igobi, a new catfish species from the rio Iguaçu drainage: the largest head in Trichomycteridae (Siluriformes: Trichomycteridae). Neotropical Ichthyology, 6, 17–23.
http://dx.doi.org/10.1590/S1679-62252008000100003Wosiacki, W.B. & de Pinna, M.C.C. (2008b) A new species of the Neotropical catfish genus Trichomycterus (Siluriformes: Trichomycteridae) representing a new body shape for the family. Copeia, 2008, 273–278.
http://dx.doi.org/10.1643/CI-06-237