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33 results for “Knodus”
FIGURE 7 in Two new species of Knodus (Characidae: Stevardiinae) from the upper rio Tocantins basin, with evidence of ontogenetic meristic changes
FIGURE 7 | Knodus obolus, paratypes. Ontogenetic and polymorphic variation of the body shape and colour patterns. All from the ribeirão Dois Irmãos drainage, upper Tocantins basin in Pirenópolis, Goiás State, Brazil. A. NUP 22668, 56.9 mm SL. B. NUP 22668, 53.2 mm SL. C. NUP 22668, 49.6 mm SL. D. NUP 22668, 45.0 mm SL. E. NUP 22668, 33.1 mm SL.
FIGURE 2 in Two new species of Knodus (Characidae: Stevardiinae) from the upper rio Tocantins basin, with evidence of ontogenetic meristic changes
FIGURE 2 | Knodus rufford, holotype, NUP 22661, 35.4 mm SL, ribeirão Dois Irmãos, tributary to the rio do Peixe, tributary to the rio das Almas, tributary to the rio Maranhão, tributary to the rio Tocantins, Municipality of Pirenópolis, Goiás State, Brazil.
FIGURE 10 in Two new species of Knodus (Characidae: Stevardiinae) from the upper rio Tocantins basin, with evidence of ontogenetic meristic changes
FIGURE 10 | Knodus aff. breviceps from the rio das Almas basin, upper Tocantins basin (collected in syntopy with K. obolus and K. rufford). A. NUP 22666, 55.3 mm SL. B. NUP 22662, 42.0 mm SL. C. NUP 22665, 28.2 mm SL. D. NUP 22665, 23.9 mm SL.
FIGURE 6 in Two new species of Knodus (Characidae: Stevardiinae) from the upper rio Tocantins basin, with evidence of ontogenetic meristic changes
FIGURE 6 | Knodus obolus, holotype, NUP 22667, 46.4 mm SL, ribeirão Dois Irmãos, tributary to the rio do Peixe, tributary to the rio das Almas, tributary to the rio Maranhão, tributary to the rio Tocantins, Municipality of Pirenópolis, Goiás State, Brazil.
FIGURE 5 in Two new species of Knodus (Characidae: Stevardiinae) from the upper rio Tocantins basin, with evidence of ontogenetic meristic changes
FIGURE 5 | Partial map of South America, showing the known geographic distribution of Knodus rufford and K. obolus. The red star encompasses the type locality and other sampling sites that are too close to be represented as separate points.
FIGURE 1 in Two new species of Knodus (Characidae: Stevardiinae) from the upper rio Tocantins basin, with evidence of ontogenetic meristic changes
FIGURE 1 | Schematic representation of four types of vertebra. In A., only the proximal portion of the ribs is shown. In B., the small bony fragment close to the tip of the transverse process in the left is an underdeveloped rib shown in full. In C., the haemal spine is not fused to the tip of the contralateral transverse processes, which meet each other medially. Notice that in D. the fusion is complete, but the bony ring, present in B. and C., is absent.
FIGURE 3 in Two new species of Knodus (Characidae: Stevardiinae) from the upper rio Tocantins basin, with evidence of ontogenetic meristic changes
FIGURE 3 | Knodus rufford, paratypes. Ontogenetic and polymorphic variation of the body shape and colour patterns. All from the ribeirão Dois Irmãos drainage, upper Tocantins basin in Pirenópolis, Goiás State, Brazil. A. NUP 22669, 39.2 mm SL. B. CPUFMT 6835, 31.7 mm SL. C. NUP 22669, 28.1 mm SL. D. CPUFMT 6835, 25.2 mm SL.
FIGURE 9 in Two new species of Knodus (Characidae: Stevardiinae) from the upper rio Tocantins basin, with evidence of ontogenetic meristic changes
FIGURE 9 | Knodus aff. breviceps, regression analysis of the number of scale series between dorsal-fin origin and lateral line. R2 = 0.26; p = 0.0003.
FIGURE 5 in A new species of Knodus (Characiformes: Characidae: Stevardiinae) from the rio Aripuanã, rio Madeira basin, Brazil
FIGURE 5 | Map of northern South America showing collection site of Knodus angustus in the rio Aripuanã, rio Madeira basin.
FIGURE 3 in A new species of Knodus (Characiformes: Characidae: Stevardiinae) from the rio Aripuanã, rio Madeira basin, Brazil
FIGURE 3 | Knodus angustus, MZUSP 124932, sexually mature male; pelvic-fin rays, ventral view, left side showing pelvic-fin hooks.
FIGURE 1 in A new species of Knodus (Characiformes: Characidae), with deep genetic divergence, from the Mearim and Munim river basins, Northeastern Brazil, and evidence for hidden diversity in adjacent river basins
FIGURE 1 | Knodus guajajara, holotype, CICCAA 4883, 31.4 mm SL, Alto Alegre do Pindaré municipality, Igarapé Arapapá, Pindaré River drainage, Mearim River basin.
FIGURE 4 in A new species of Knodus (Characiformes: Characidae), with deep genetic divergence, from the Mearim and Munim river basins, Northeastern Brazil, and evidence for hidden diversity in adjacent river basins
FIGURE 4 | Knodus guajajara, CICCAA 4861, paratype, male, 31.9 mm SL Maranhão, Mearim River basin. A. Hooks on pelvic fin. B. Hooks on anal fin. (Photographed by F. P. Ottoni).
FIGURE 2 in A new species of Knodus (Characiformes: Characidae), with deep genetic divergence, from the Mearim and Munim river basins, Northeastern Brazil, and evidence for hidden diversity in adjacent river basins
FIGURE 2 | Knodus guajajara, paratypes. A. CICCAA 1518, 22.8 mm SL, Brazil, Maranhão, Alto Alegre do Pindaré municipality, igarapé Jenipapo, Pindaré River drainage, Mearim River basin. B. CICCAA 2696, 40.2 mm SL, Brazil, Maranhão, Chapadinha municipality, stream in riparian forest on the road BR–222, Munim River basin.
FIGURE 3 in A new species of Knodus (Characiformes: Characidae), with deep genetic divergence, from the Mearim and Munim river basins, Northeastern Brazil, and evidence for hidden diversity in adjacent river basins
FIGURE 3 | Knodus guajajara, CICCAA 4861, paratype, 31.9 mm SL, jaw suspensorium. A. Premaxillary. B. Maxilla. C. Dentary. Scale bar = 1 mm.
FIGURE 4 in Two new species of Knodus (Characidae: Stevardiinae) from the upper rio Tocantins basin, with evidence of ontogenetic meristic changes
FIGURE 4 | Knodus rufford, c&s paratype, CPUFMT 6834, 31.1 mm SL.
FIGURE 8 in Two new species of Knodus (Characidae: Stevardiinae) from the upper rio Tocantins basin, with evidence of ontogenetic meristic changes
FIGURE 8 | Knodus obolus, c&s paratype, CPUFMT 6837, 50.3 mm SL.
FIGURE 5 in A new species of Knodus (Characiformes: Characidae), with deep genetic divergence, from the Mearim and Munim river basins, Northeastern Brazil, and evidence for hidden diversity in adjacent river basins
FIGURE 5 | Geographical distribution of Knodus guajajara.
FIGURE 7 in A new rheophilic species of Knodus Eigenmann (Characiformes: Characidae Stevardiinae) from the upper rio Juruena, rio Tapajós basin, Chapada dos Parecis Mato Grosso, Brazil
FIGURE 7. Type locality of Knodus ytuanama, rio Mutum near road BR-174, affluent of upper rio Juruena, rio Tapajós basin, Comodoro, Mato Grosso, Brazil.
FIGURE 6 in A new rheophilic species of Knodus Eigenmann (Characiformes: Characidae Stevardiinae) from the upper rio Juruena, rio Tapajós basin, Chapada dos Parecis Mato Grosso, Brazil
FIGURE 6. Map of central western Brazil showing hydrographic basins on the Chapada dos Parecis, with the type-locality of Knodus ytuanama indicated by a black star.
FIGURE 3. Knodus ytuanama, CPUFMT 7647 in A new rheophilic species of Knodus Eigenmann (Characiformes: Characidae Stevardiinae) from the upper rio Juruena, rio Tapajós basin, Chapada dos Parecis Mato Grosso, Brazil
FIGURE 3. Knodus ytuanama, CPUFMT 7647, close-up of A) dorsal fin (83.7 mm SL), B) anal fin (83.7 mm SL), and C) caudal fin (71.3 mm SL). Arrows indicate the presence of folded membranes lateral view, anterior to left.
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