Results 121 to 130 of about 335 (151)
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Acta Zoologica, 2010
AbstractSpadella, M.A., Oliveira, C. and Quagio‐Grassiotto, I. 2009. Spermiogenesis and spermatozoal ultrastructure in Trichomycteridae (Teleostei: Ostariophysi: Siluriformes). —Acta Zoologica (Stockholm) 91: 373–389.Siluriformes comprises the most diverse and widely distributed ostariophysan group, a fish assemblage that includes about three quarters ...
Spadella, Maria Angelica +2 more
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AbstractSpadella, M.A., Oliveira, C. and Quagio‐Grassiotto, I. 2009. Spermiogenesis and spermatozoal ultrastructure in Trichomycteridae (Teleostei: Ostariophysi: Siluriformes). —Acta Zoologica (Stockholm) 91: 373–389.Siluriformes comprises the most diverse and widely distributed ostariophysan group, a fish assemblage that includes about three quarters ...
Spadella, Maria Angelica +2 more
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Threatened fishes of the world: Trichomycterus chungaraensis Arratia 1983 (Trichomycteridae)
Environmental Biology of Fishes, 2007Trichomycterus chungaraensis is an endemic and endangered fish from the south high Andean plateau; mainly due to its habitat total extension thus has been calculated to be 2,910 m2 and inhabiting solely in Mal Paso stream, at the UNESCO Biosphere Reserve and Lauca National Park.
Pardo, Rodrigo, Vila Pinto, Irma
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Zootaxa, 2023
Trichomycterinae catfishes often have high intraspecific variability in colour patterns that may be associated with ontogenetic changes or habitat preferences. In species of the eastern South American genus Trichomycterus s.s., some cases of chromatic polymorphism have been reported but colour pattern is still considered an important tool for species ...
PAULO J. VILARDO +2 more
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Trichomycterinae catfishes often have high intraspecific variability in colour patterns that may be associated with ontogenetic changes or habitat preferences. In species of the eastern South American genus Trichomycterus s.s., some cases of chromatic polymorphism have been reported but colour pattern is still considered an important tool for species ...
PAULO J. VILARDO +2 more
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Molecular Phylogenetics and Evolution, 2023
The catfish subfamily Trichomycterinae is widely distributed in South America inhabiting several habitats, but specially mountain streams. Trichomycterus is the most speciose trichomycterid genus and recently due to his paraphyletic condition has been restricted to a clade from eastern Brazil called Trichomycterus sensu stricto comprising around 80 ...
P.J. Vilardo, A.M. Katz, W.J.E.M. Costa
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The catfish subfamily Trichomycterinae is widely distributed in South America inhabiting several habitats, but specially mountain streams. Trichomycterus is the most speciose trichomycterid genus and recently due to his paraphyletic condition has been restricted to a clade from eastern Brazil called Trichomycterus sensu stricto comprising around 80 ...
P.J. Vilardo, A.M. Katz, W.J.E.M. Costa
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Journal of Morphology, 1983
AbstractThe different elements of the caudal skeleton of the South American catfish genera Nematogenys (Nematogenyinae) and Trichomycterus, Hatcheria, and Bullockia (Pygidiinae) (Siluriformes, Trichomycteridae) show Ontogenetic transformation of the second ural centrum in Trichomycteridae separates the subfamilies Nematogenyinae and Pygidiinae.
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AbstractThe different elements of the caudal skeleton of the South American catfish genera Nematogenys (Nematogenyinae) and Trichomycterus, Hatcheria, and Bullockia (Pygidiinae) (Siluriformes, Trichomycteridae) show Ontogenetic transformation of the second ural centrum in Trichomycteridae separates the subfamilies Nematogenyinae and Pygidiinae.
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Copeia, 2006
Abstract A new diagnosis for the trichomycterid genus Henonemus based on external characters is offered, and Henonemus triacanthopomus, new species, is described from the Orinoco River basin in Venezuela. The new species is distinguished from the other species of the genus by three or asymmetrically four opercular odontodes in specimens longer than 80 ...
Carlos DoNascimiento +1 more
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Abstract A new diagnosis for the trichomycterid genus Henonemus based on external characters is offered, and Henonemus triacanthopomus, new species, is described from the Orinoco River basin in Venezuela. The new species is distinguished from the other species of the genus by three or asymmetrically four opercular odontodes in specimens longer than 80 ...
Carlos DoNascimiento +1 more
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Zootaxa, 2016
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
García-Melo, Luis +2 more
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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
García-Melo, Luis +2 more
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Copeia, 2004
Abstract Trichomycterus pseudosilvinichthys, new species, is described from midelevation drainages in the Provincia de La Rioja, Argentina. The new species is distinguished from other members of the apparently nonmonophyletic genus Trichomycterus by having the insertion of the first proximal dorsal-fin pterygiophore at, or posterior to, vertebra 20 to ...
Luis Fernández, Richard P Vari
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Abstract Trichomycterus pseudosilvinichthys, new species, is described from midelevation drainages in the Provincia de La Rioja, Argentina. The new species is distinguished from other members of the apparently nonmonophyletic genus Trichomycterus by having the insertion of the first proximal dorsal-fin pterygiophore at, or posterior to, vertebra 20 to ...
Luis Fernández, Richard P Vari
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Zootaxa, 2007
Trichomycterus santanderensis, described as a new species of troglomorphic catfish, was collected from the cave “El Puente” located in the upper Lebrija River basin of the Santander Department of northeast Colombia. The new species has light-red pigmentation, a first pectoral ray as long as the pectoral fin, and variable reduction in eye size.
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Trichomycterus santanderensis, described as a new species of troglomorphic catfish, was collected from the cave “El Puente” located in the upper Lebrija River basin of the Santander Department of northeast Colombia. The new species has light-red pigmentation, a first pectoral ray as long as the pectoral fin, and variable reduction in eye size.
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