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901 results for “Amazon basin”
FIGURE 1 in Redescription of Moenkhausia melogramma (Characiformes: Characidae), a poorly known tetra from the western Amazon basin
FIGURE 1 | Moenkhausia melogramma, holotype, MCZ 20285, 38.3 mm SL, Brazil, Amazonas, Tabatinga. A. recent photograph, available on MCZ website (all rights reserved); B. after Eigenmann, 1917 (pl. 6, fig. 1).
FIGURE 4 in Redescription of Moenkhausia melogramma (Characiformes: Characidae), a poorly known tetra from the western Amazon basin
FIGURE 4 | Distribution of Moenkhausia melogramma in the western Amazon basin. Red star represents the type locality; black circles represent remaining known localities (one symbol may represent more than one lot).
FIGURE 3 in A new species of Cyphocharax (Characiformes: Curimatidae) with a horizontal color pattern from the rio Tapajós drainage, Amazon basin, Brazil
FIGURE 3 | A. Cyphocharax pantostictos, ZUEC 17137, 48.8 mm SL, Peru, Loreto, río Itaya basin; B. Cyphocharax multilineatus, MCP 54223, 116.3 mm SL, Brazil, Pará, Santarém, rio Mentaí.
FIGURE 2 in A new species of Cyphocharax (Characiformes: Curimatidae) with a horizontal color pattern from the rio Tapajós drainage, Amazon basin, Brazil
FIGURE 2 | Map of the lower Tapajós basin and its confluence with rio Amazonas showing the distribution of Cyphocharax cramptoni. The red dot indicates the type locality.
FIGURE 1 in A new species of Cyphocharax (Characiformes: Curimatidae) with a horizontal color pattern from the rio Tapajós drainage, Amazon basin, Brazil
FIGURE 1 | Cyphocharax cramptoni; A. holotype, ZUE C 17124, 49.7 mm SL, Brazil, Pará, Santarém, rio Mentaí; B. Living specimen, ZUEC 12071, 30.2 mm SL, same data as holotype.
Fig. 5 in Effects of urbanization on the diversity of testate amoebae (Protist, Rhizopoda) in a stream of the southwestern Amazon basin (Igarapé São Francisco in Acre state, Brazil)
Fig. 5. Variation in the mean species richness (A) and density (B) of testate amoebae recorded among the different sampling points on the São Francisco stream in Acre state, northern Brazil.
Fig. 4 in Effects of urbanization on the diversity of testate amoebae (Protist, Rhizopoda) in a stream of the southwestern Amazon basin (Igarapé São Francisco in Acre state, Brazil)
Fig. 4. The most abundant species of testate amoeba recorded in the present study: (A) Netzelia corona, (B) Arcella vulgaris, (C) Arcella brasiliensis, (D) Arcella discoide, (E) Centropyxis aculeata. Examples of the species of testate amoeba recorded in the state of Acre for the first time: (F) Difflugia distenda, (G) Difflugia sinuata, (H) Arcella gandalfi.
Fig. 2 in Effects of urbanization on the diversity of testate amoebae (Protist, Rhizopoda) in a stream of the southwestern Amazon basin (Igarapé São Francisco in Acre state, Brazil)
Fig. 2. Phytophysiognomy of sampling points in the São Francisco stream in the state of Acre, Brazil according to the degree of urbanization.
Fig. 1 in Effects of urbanization on the diversity of testate amoebae (Protist, Rhizopoda) in a stream of the southwestern Amazon basin (Igarapé São Francisco in Acre state, Brazil)
Fig. 1. Location of sampling points on the São Francisco stream in the municipalities of Rio Branco and Bujari, in Acre state, northern Brazil.
Fig. 6 in Effects of urbanization on the diversity of testate amoebae (Protist, Rhizopoda) in a stream of the southwestern Amazon basin (Igarapé São Francisco in Acre state, Brazil)
Fig. 6. Biplot of the first two axes of the Redundancy Analysis of the scores of the streams according to the abiotic variables (TC = Thermotolerant Coliforms; EC = Electrical Conductivity, DO = Oxygen; pH = Hydrogen potential; TotP = Total Phosphorus; Temp = Temperature; Turb = Turbidity; NH 4 = Ammonia; NO 2 = Nitrate), the legend explains the symbols corresponding to the family names.
Fig. 3 in Effects of urbanization on the diversity of testate amoebae (Protist, Rhizopoda) in a stream of the southwestern Amazon basin (Igarapé São Francisco in Acre state, Brazil)
Fig. 3. Plot of the results of the Principal Components Analysis (PCA) of the environmental variables of the São Francisco stream in Rio Branco e Bujari, Acre (Brazil): TC = Thermotolerant Coliforms; EC = Electrical Conductivity; pH = Hydrogen potential; DO = Oxygen; TotP = Total Phosphorus; Phos = Phosphate; Temp = Temperature; Transp = Transparency; Turb = Turbidity; FR = Flow Rate; Dep = Depth; NH 4 = Ammonia; NO 3 = Nitrite; NO 2 = Nitrate.
FIGURE 3 in A new species of the seasonal killifish genus Moema (Cyprinodontiformes: Rivulidae) from the Piraí watershed in the Southwest Amazon basin
FIGURE 3 | Moema juanderibaensis, MNKP 16543, paratype, female, 36.1 mm SL (1 day after collection, left side), Bolivia, Santa Cruz, Santa Rosa del Sara.
FIGURE 6 in A new species of the seasonal killifish genus Moema (Cyprinodontiformes: Rivulidae) from the Piraí watershed in the Southwest Amazon basin
FIGURE 6 | Occurrence localities of Moema species in Bolivia and surroundings. Sources: Hydrologic Units from Lehner, Grill (2013); Basemap ESRI World Topo (2022).
FIGURE 2 in A new species of the seasonal killifish genus Moema (Cyprinodontiformes: Rivulidae) from the Piraí watershed in the Southwest Amazon basin
FIGURE 2 | Moema juanderibaensis, MNKP 16539, holotype, male, 41.9 mm SL (2 days after collection, right side), Bolivia, Santa Cruz, Santa Rosa del Sara.
FIGURE 4 in A new species of the seasonal killifish genus Moema (Cyprinodontiformes: Rivulidae) from the Piraí watershed in the Southwest Amazon basin
FIGURE 4 | Moema juanderibaensis, MNKP 16541, paratypes, males, 41.3–46.1 mm SL (2 days after collection, left side), Bolivia, Santa Cruz, Santa Rosa del Sara.
FIGURE 1 in A new species of the seasonal killifish genus Moema (Cyprinodontiformes: Rivulidae) from the Piraí watershed in the Southwest Amazon basin
FIGURE 1 | Moema juanderibaensis, MNKP 16539, holotype, male, 41.9 mm SL (24 days after collection, left side), Bolivia, Santa Cruz, Santa Rosa del Sara.
FIGURE 7 in A new species of the seasonal killifish genus Moema (Cyprinodontiformes: Rivulidae) from the Piraí watershed in the Southwest Amazon basin
FIGURE 7 | Moema pepotei, CAS-SU 63604, holotype, male, 45.4 mm SL, Brazil, Rondônia, Forte Príncipe da Beira (on Bolivian border). Source: CAS Ichthyology Primary Types Imagebase.
FIGURE 5 in A new Hyphessobrycon (Characiformes: Characidae) of the Hyphessobrycon heterorhabdus species-group from the lower Amazon basin, Brazil
FIGURE 5 | Schematic representation of humeral blotch and anterior portion of midlateral stripe between Hyphessobrycon cantoi (A, ZUEC 14597, paratype 32.1 mm SL, rio Amazonas basin) and H. heterorhabdus (B, INPA 41126, 27.8 mm SL, rio Curuá-Una basin).
FIGURE 3 in A new Hyphessobrycon (Characiformes: Characidae) of the Hyphessobrycon heterorhabdus species-group from the lower Amazon basin, Brazil
FIGURE 3 | Map of the lower rio Tapajós and its confluence with the rio Amazonas, showing the known distribution of Hyphessobrycon cantoi (red circles indicate paratypes localities; yellow diamond indicates type locality).
FIGURE 4 in A new Hyphessobrycon (Characiformes: Characidae) of the Hyphessobrycon heterorhabdus species-group from the lower Amazon basin, Brazil
FIGURE 4 | Neighbor-joining tree of Hyphessobrycon cantoi and others lineages of H. heterorhabdus speciesgroup. Red color indicating the new species. Species were delimited through GMYC, BIN and ABGD analysis. Values in brackets expressed the number variable sites that separate H. cantoi and values in branches indicate bootstrap values.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
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