Browsing by Autor "Carlos DoNascimiento"

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An unexpectedly diverse new genus of catfishes (Siluriformes, Heptapteridae) endemic to the Magdalena River basin, Colombia
(2026) Carlos DoNascimiento; Francisco A. Villa‐Navarro; Juan G. Albornoz-Garzón; Cristhian C. Conde‐Saldaña; Gabriel S. C. Silva; Alejandro Méndez-López; Fábio Fernandes Roxo; Armando Ortega-Lara; Anna Rita Ross
Lista de especies de peces de agua dulce de Colombia / Checklist of the freshwater fishes of Colombia
(2026) Carlos DoNascimiento; Agudelo-Zamora Henry; Juan D. Bogota-Gregory; Carlos DoNascimiento; Edgar Esteban Herrera-Collazos; Guido Herrera-R; Armando Ortega-Lara; Francisco A. Villa-Navarro; José Saulo Usma Oviedo; Javier A. Maldonado‐Ocampo
Lista de especies de peces de agua dulce de Colombia / Checklist of the freshwater fishes of Colombia
(2026) Carlos DoNascimiento; Agudelo-Zamora Henry; Juan D. Bogota-Gregory; Carlos DoNascimiento; Edgar Esteban Herrera-Collazos; Guido Herrera-R; Armando Ortega-Lara; Francisco A. Villa-Navarro; José Saulo Usma Oviedo; Javier A. Maldonado-Ocampo
Lista de especies de peces de agua dulce de Colombia / Checklist of the freshwater fishes of Colombia
(2025) Carlos DoNascimiento; Henry D. Agudelo-Zamora; Juan D. Bogota-Gregory; Carlos DoNascimiento; Edgar Esteban Herrera-Collazos; Guido Herrera-R; Armando Ortega-Lara; Francisco A. Villa-Navarro; José Saulo Usma Oviedo; Javier A. Maldonado-Ocampo
Lista de especies de peces de agua dulce de Colombia / Checklist of the freshwater fishes of Colombia
(2025) Carlos DoNascimiento; Agudelo-Zamora Henry; Juan David Bogotá-Grégory; Carlos DoNascimiento; Edgar Esteban Herrera-Collazos; Guido Herrera-R; Armando Ortega-Lara; Francisco A. Villa-Navarro; José Saulo Usma Oviedo; Javier A. Maldonado‐Ocampo
Phylogenetic assessment and taxonomic description of the first scale-feeding candiru from west of the Andes (Siluriformes, Trichomycteridae)
(Oxford University Press, 2026) Carlos DoNascimiento; Armando Ortega-Lara; Juan G. Albornoz-Garzón; César Román-Valencia; Nathan K. Lujan
Abstract Among vertebrates, specialized scale-feeding occurs almost exclusively in tropical freshwater fishes, with the Amazon basin having the richest regional assemblage of such specialists. With 28 valid species and 11 valid genera, 10 of which are ectoparasitic scale and mucus-feeders, the Neotropical trichomycterid subfamily Stegophilinae is the only fish lineage to have significantly diversified within this niche. Stegophilines are widespread and ubiquitous throughout the lowland freshwaters of South America, east of the Andes. We describe Arhinoglanis gen. nov. and Arhinoglanis relictus sp. nov., the first Stegophilinae from west of the Andes, from the upper Cauca River drainage, Colombia. At 26.4 mm maximum standard length, the new genus and species is also the first miniature Stegophilinae. Using diaphanization, light microscopy, and micro-computed tomography imagery, we coded 534 morphological characters for 50 terminal taxa to recover the new taxon as sister to the exclusively cis-Andean clade of Homodiaetus + Schultzichthys. A single unique synapomorphy unites these genera: proximal tip of ceratobranchial 5 wider than proximal tip of ceratobranchial 4. Five autapomorphies diagnose the new genus, the most notable of which is a paedomorphically unossified dorsal lamina of the mesethmoid. The scarcity and highly restricted distribution of the new species within the Magdalena basin has led to its evaluation as Critically Endangered.
Table 1 in Trichomycterus venulosus (Steindachner, 1915), a junior synonym of Eremophilus mutisii Humboldt, 1805 (Siluriformes: Trichomycteridae) and not an extinct species
(European Organization for Nuclear Research, 2014) Carlos DoNascimiento; Saúl Prada-Pedreros; Pedro Ricardo Dueñas
Table 1. Comparative list of osteological and meristic characters for Trichomycterus venulosus (NMW 44476: 1, syntype of Pygidium venulosum), Eremophilus mutisii (MPUJ 1963, 1 CS; MPUJ 1599, 2 RX) and Trichomycterus sp. A (Páramo de Cruz Verde) (MBUCV-CT-1047, 1 CS; MBUCV-CT-1053, 3 CS; MPUJ 2482, 6 RX; MPUJ 2491, 2 RX; MPUJ 4191, 1 RX). CharactersTrichomycterus venulosusEremophilus mutisiiTrichomycterus sp. A (Páramo de Cruz Verde)Premaxilla shapeAnterior margin extending more laterally than posterior margin, forming a conspicuous pointed lateral projection. Lateral margin slightly concaveAnterior margin extending more laterally than posterior marginAnterior margin not extending more laterally than posterior margin. Lateral margin convex. Second and third teeth rows extending slightly more laterally than anterior and posterior rowsPremaxilla relative lengthSimilar to maxillaPremaxilla equal or slightly shorter than maxillaLonger than maxillaAutopalatinePosterolateral process extending posteriorly to anguloarticular articulation with quadratePosterolateral process extending posteriorly to anguloarticular articulation with quadrate. Lateral margin slightly convexPosterolateral process forming a conspicuous angle with the lateral marginBranchiostegal rays87-86-7Pectoral-fin rays888-9Precaudal vertebrae1717-189-13Caudal vertebrae252527-32Ribs1816-1814-18First hemal spineVertebra 19Vertebra 19Vertebrae 16-19Dorsal-fin rays1313-1411-13Dorsal-fin basal radials10108Dorsal-fin insertionVertebrae 21-27Vertebrae 21-27Vertebrae 18-23; 18-24; 19-24Anal-fin rays111111-12Anal-fin basal radials886-7Anal-fin insertionVertebrae 25-31Vertebrae 25-31Vertebrae 22-26; 23-27; 23-28; 24-28Neural spine of compound caudal vertebraComplete, ca. 1/ of adjacent 3 neural spine heightComplete, 1/ -1/ of adjacent 3 2 neural spine heightComplete, with a short rounded tip, and base having conspicuous broad anterior and posterior apophysisDorsal procurrent caudal-fin rays1313-1616-21Dorsal procurrent rays originVertebra 6Vertebrae 6-8Vertebrae 7-10Ventral procurrent caudal-fin rays1212-1514-17Ventral procurrent rays originVertebra 6Vertebrae 6-8Vertebrae 8-10Caudal skeletonPH+1+2, 3, 4+5PH+1+2, 3, 4+5PH+1+2, 3+4+5
Table 1 in Trichomycterus venulosus (Steindachner, 1915), a junior synonym of Eremophilus mutisii Humboldt, 1805 (Siluriformes: Trichomycteridae) and not an extinct species
(European Organization for Nuclear Research, 2014) Carlos DoNascimiento; Saúl Prada-Pedreros; Pedro Ricardo Dueñas
Table 1. Comparative list of osteological and meristic characters for Trichomycterus venulosus (NMW 44476: 1, syntype of Pygidium venulosum), Eremophilus mutisii (MPUJ 1963, 1 CS; MPUJ 1599, 2 RX) and Trichomycterus sp. A (Páramo de Cruz Verde) (MBUCV-CT-1047, 1 CS; MBUCV-CT-1053, 3 CS; MPUJ 2482, 6 RX; MPUJ 2491, 2 RX; MPUJ 4191, 1 RX). CharactersTrichomycterus venulosusEremophilus mutisiiTrichomycterus sp. A (Páramo de Cruz Verde)Premaxilla shapeAnterior margin extending more laterally than posterior margin, forming a conspicuous pointed lateral projection. Lateral margin slightly concaveAnterior margin extending more laterally than posterior marginAnterior margin not extending more laterally than posterior margin. Lateral margin convex. Second and third teeth rows extending slightly more laterally than anterior and posterior rowsPremaxilla relative lengthSimilar to maxillaPremaxilla equal or slightly shorter than maxillaLonger than maxillaAutopalatinePosterolateral process extending posteriorly to anguloarticular articulation with quadratePosterolateral process extending posteriorly to anguloarticular articulation with quadrate. Lateral margin slightly convexPosterolateral process forming a conspicuous angle with the lateral marginBranchiostegal rays87-86-7Pectoral-fin rays888-9Precaudal vertebrae1717-189-13Caudal vertebrae252527-32Ribs1816-1814-18First hemal spineVertebra 19Vertebra 19Vertebrae 16-19Dorsal-fin rays1313-1411-13Dorsal-fin basal radials10108Dorsal-fin insertionVertebrae 21-27Vertebrae 21-27Vertebrae 18-23; 18-24; 19-24Anal-fin rays111111-12Anal-fin basal radials886-7Anal-fin insertionVertebrae 25-31Vertebrae 25-31Vertebrae 22-26; 23-27; 23-28; 24-28Neural spine of compound caudal vertebraComplete, ca. 1/ of adjacent 3 neural spine heightComplete, 1/ -1/ of adjacent 3 2 neural spine heightComplete, with a short rounded tip, and base having conspicuous broad anterior and posterior apophysisDorsal procurrent caudal-fin rays1313-1616-21Dorsal procurrent rays originVertebra 6Vertebrae 6-8Vertebrae 7-10Ventral procurrent caudal-fin rays1212-1514-17Ventral procurrent rays originVertebra 6Vertebrae 6-8Vertebrae 8-10Caudal skeletonPH+1+2, 3, 4+5PH+1+2, 3, 4+5PH+1+2, 3+4+5