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2. Rediscovery of Rhyacoglanis pulcher (Boulenger, 1887) (Siluriformes: Pseudopimelodidae), a rare rheophilic bumblebee catfish from Ecuadorian Amazon.

Author

Junior Chuctaya, Oscar Akio Shibatta, Andrea C Encalada, Karla S Barragán, Maria de Lourdes Torres, Estefanía Rojas, Valeria Ochoa-Herrera, and Juliano Ferrer

Subjects
Medicine, Science
Abstract

Rhyacoglanis pulcher is a rare Neotropical rheophilic bumblebee catfish known only from the type locality in the Cis-Andean Amazon region, Ecuador, and the type-species of the genus. So far, the three syntypes collected in 1880 were the only specimens unambiguously associated to the name R. pulcher available in scientific collections. Recently, a specimen was discovered in a fast-flowing stretch of the Villano river, a tributary of the Curaray river, Napo river basin, Ecuador, representing a new record after nearly 140 years. Here, we present this new record, identified by morphology, provide the DNA barcode sequence of the specimen, and propose why the species of Rhyacoglanis are scarce in zoological collections. Additionally, we discuss the intraspecific variation in the color pattern observed in R. pulcher.

Published
2023
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3. Living in the waterfalls: A new species of Trichomycterus (Siluriformes: Trichomycteridae) from Tabay stream, Misiones, Argentina.

Author

Guillermo Enrique Terán, Juliano Ferrer, Mauricio Benitez, Felipe Alonso, Gastón Aguilera, and Juan Marcos Mirande

Subjects
Medicine, Science
Abstract

A new species assigned to the genus Trichomycterus from the area of the waterfalls of Tabay stream, Paraná River basin, Misiones, Argentina, is described. Trichomycterus ytororo sp. nov. is distinguished from all other species in the genus by the presence of 31-35 dorsal procurrent caudal-fin rays and the combination of some external characters such as: coloration, number of pectoral-fin rays and pores of the laterosensory canals. The new taxon belongs to a presumably monophyletic group of species composed of T. crassicaudatus, T. igobi, and T. stawiarski based on the presence of 24 or more thickly ossified and rigid procurrent caudal-fin rays with a slender distal tip extending along the tips of at least ten neural spines.

Published
2017
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4. Living in the waterfalls: A new species of Trichomycterus (Siluriformes: Trichomycteridae) from Tabay stream, Misiones, Argentina

Author

Gastón Aguilera, Mauricio Fabián Benitez, Juliano Ferrer, Guillermo Enrique Teran, Juan Marcos Mirande, and Felipe Alonso

Subjects
0106 biological sciences, Vertebrae, lcsh:Medicine, Transportation, Fresh Water, PARANÁ RIVER BASIN, 01 natural sciences, purl.org/becyt/ford/1 [https], Monophyly, Genus, Parana river, Medicine and Health Sciences, lcsh:Science, Musculoskeletal System, Catfishes, Data Management, Skin, Multidisciplinary, biology, Pigmentation, Integumentary system, New Species Reports, CAUDAL PROCURRENTS RAYS, Transportation Infrastructure, Engineering and Technology, Anatomy, Integumentary System, CIENCIAS NATURALES Y EXACTAS, Research Article, Computer and Information Sciences, Imaging Techniques, Trichomycterus, Otras Ciencias Biológicas, Argentina, 010607 zoology, Zoology, Research and Analysis Methods, Civil Engineering, 010603 evolutionary biology, Ciencias Biológicas, Ocular System, Animals, purl.org/becyt/ford/1.6 [https], Taxonomy, Lips, Mouth, Morphometry, lcsh:R, Biology and Life Sciences, biology.organism_classification, TRICHOMYCTERUS STAWIARSKI GROUP, Spine, Spine (zoology), Taxon, Face, Alcohols, Canals, Eyes, lcsh:Q, Head, Digestive System, Animal Distribution, Trichomycteridae, BRANCHISOTEGAL RAYS
Abstract

A new species assigned to the genus Trichomycterus from the area of the waterfalls of Tabay stream, Paraná River basin, Misiones, Argentina, is described. Trichomycterus ytororo sp. nov. is distinguished from all other species in the genus by the presence of 31?35 dorsal procurrent caudal-fin rays and the combination of some external characters such as: coloration, number of pectoral?fin rays and pores of the laterosensory canals. The new taxon belongs to a presumably monophyletic group of species composed of T. crassicaudatus, T. igobi, and T. stawiarski based on the presence of 24 or more thickly ossified and rigid procurrent caudal-fin rays with a slender distal tip extending along the tips of at least ten neural spines. Fil: Teran, Guillermo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo. San Miguel de Tucumán; Argentina Fil: Ferrer, Juliano. Universidade Federal do Rio Grande do Sul; Brasil Fil: Benitez, Mauricio Fabián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina Fil: Alonso, Felipe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentina Fil: Aguilera, Gaston. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo. San Miguel de Tucumán; Argentina Fil: Mirande, Juan Marcos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo. San Miguel de Tucumán; Argentina

Published
2017

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