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Intergeneric phylogenetic relationships in catfishes of the Loricariinae (Siluriformes: Loricariidae), with the description of Fonchiiloricaria nanodon: a new genus and species from Peru


  • M. S. Rodriguez,

    1. Laboratório de Ictiologia de Ribeirão Preto (LIRP), Departamento de Biologia FFCLRPUniversidade de São Paulo, Avenida dos Bandeirantes, 3900CEP:14040-901, Ribeirão Preto (SP), Brazil
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  • H. Ortega,

    1. Departamento de Ictiologia, Museo de Historia Natural, Universidad Nacional Mayor de San Marcos. Av. Arenales 1256, Lima 11, Peru
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  • R. Covain

    Corresponding author
    1. Département d’herpétologie et d’ichtyologie, Muséum d’histoire naturelle, 1 route de Malagnou, C.P. 6434, CH-1211 Genève 6, Switzerland
    2. Département de zoologie et de biologie animale, Université de Genève, Sciences III, 30 quai E. Ansermet, CH-1211 Genève 4, Switzerland
    3. Université de Lyon; Université Lyon 1; CNRS; UMR 5558, Laboratoire de Biométrie et Biologie Evolutive, 43 boulevard du 11 novembre 1918, Villeurbanne F-69622, France
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Recent investigations in the upper Río Huallaga in Peru revealed the presence of an intriguing species of the Loricariinae. To characterize and place this species within the evolutionary tree of the subfamily, a molecular phylogeny of this group was inferred based on the 12S and 16S mitochondrial genes and the nuclear gene F-reticulon4. The phylogeny indicated that this distinctive species was a member of the subtribe Loricariina. Given its phylogenetic placement, and its unusual morphology, this species is described as a new genus and new species of Loricariinae: Fonchiiloricaria nanodon. This new taxon is diagnosed by usually possessing one to three premaxillary teeth that are greatly reduced; lips with globular papillae on the surface; the distal margin of lower lip bearing short, triangular filaments; the premaxilla greatly reduced; the abdomen completely covered by plates, with the plates between lateral abdominal plates small and rhombic; a caudal fin with 14 rays; the orbital notch absent; five lateral series of plates; dorsal-fin spinelet absent; preanal plate present, large and solid, and of irregular, polygonal shape, the caudal peduncle becoming more compressed posteriorly for the last seven to 10 plates.