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901 results for “Amazon Basin”
FIGURE 9 in A new genus and species of miniature tridentine catfish from the Amazon basin (Siluriformes: Trichomycteridae)
FIGURE 9 | Gill arches of Rhinotridens chromocaudatus, digital illustration of c&s specimen, dorsal view, paratype, MZUSP 128217, 16.72 mm SL; right dorsal elements not shown. Bb1-4, basibranchials 1 to 4; Cb1-5, ceratobranchials 1 to 5; Eb1-4, epibranchials 1 to 4; Hb1-3, hypobranchials 1 to 3; Pb4, pharyngobranchial 4; Utp, upper pharyngeal tooth plate. Scale bar = 0.1 mm.
FIGURE 12 in A new genus and species of miniature tridentine catfish from the Amazon basin (Siluriformes: Trichomycteridae)
FIGURE 12 | Phylogenetic relationships of A. Trichomycteridae (Ochoa et al., 2020) and B. Tridentinae (Baskin, 1973; present study). See Discussion for character numbering and explanation.
FIGURE 7 in Genetic comparison of populations of Piaractus brachypomus and P. orinoquensis (Characiformes: Serrasalmidae) of the Amazon and Orinoco basins
FIGURE 7 | Discriminant analysis of principal components (DAPC) based in six microsatellite loci of 95 individuals of Piraractus orinoquensis.
FIGURE 6 in Genetic comparison of populations of Piaractus brachypomus and P. orinoquensis (Characiformes: Serrasalmidae) of the Amazon and Orinoco basins
FIGURE 6 | Management units of Piaractus. In Piaractus brachypomus the color blue corresponds to the MUs of the sedimentary basin (1), the color violet represents the south shield MUs (2) and the sky-blue color represents the northern shield MUs (3). Piaractus orinoquensis is represented by a single MU indicated in orange (4).
FIGURE 3 in Genetic comparison of populations of Piaractus brachypomus and P. orinoquensis (Characiformes: Serrasalmidae) of the Amazon and Orinoco basins
FIGURE 3 | Haplotype genealogies of Piaractus orinoquensis. The circle size is proportional to the haplotype frequency. Each line represents a single mutation. Colors correspond to localities.
FIGURE 2 in Genetic comparison of populations of Piaractus brachypomus and P. orinoquensis (Characiformes: Serrasalmidae) of the Amazon and Orinoco basins
FIGURE 2 | Haplotype genealogies of Piaractus brachypomus. The circle size is proportional to the haplotype frequency. Each line represents a single mutation. Colors correspond to localities.
FIGURE 1 in Genetic comparison of populations of Piaractus brachypomus and P. orinoquensis (Characiformes: Serrasalmidae) of the Amazon and Orinoco basins
FIGURE 1 | Map of the study area for sampling sites for Piaractus brachypomus and P. orinoquensis samples. The number inside the circle indicates the sampling location. The green circle indicates the samples that were analyzed for nDNA and the blue circle the samples analyzed with nDNA and mDNA. Orinoco basin (1. San José del Guaviare, 2. Puerto López, 3. Puerto Carreño, 4. San Fernando de Apure, 5. San Felix). Amazon basin (1. Guajará-Mirim, 2. Boca do Acre, 3. Leticia, 4. La Pedrera, 5. Cidade Japurá, 6. Parimé River, 7. Humaitá, 8. Cidade Juruá, 9. Tefé, 10. Beruri, 11. Janauacá, 12. Borba, 13. Itaituba. 14. Óbidos, 15. Santarém).
FIGURE 5 in Genetic comparison of populations of Piaractus brachypomus and P. orinoquensis (Characiformes: Serrasalmidae) of the Amazon and Orinoco basins
FIGURE 5 | Discriminant analysis of principal components (DAPC) based in seven microsatellite loci of 300 individuals of Piaractus brachypomus.
FIGURE 4 in Genetic comparison of populations of Piaractus brachypomus and P. orinoquensis (Characiformes: Serrasalmidae) of the Amazon and Orinoco basins
FIGURE 4 | A. Barplots created from Structure representing assignments of genotypes to each local population for Piaractus brachypomus, the blue color cluster represents individuals related to the Amazon sedimentary basin and the purple color cluster represents individuals related to the crystalline shields of the Amazon basin. B. Barplots hierarchical from crystalline shields of the Amazon basin.
Linked collectors and determiners for: New records and diagnostic notes on large carpenter bees (Hymenoptera: Apidae: genus Xylocopa Latreille), from the Amazon River basin of South America.
Natural history specimen data linked to collectors and determiners held within, "New records and diagnostic notes on large carpenter bees (Hymenoptera: Apidae: genus Xylocopa Latreille), from the Amazon River basin of South America". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/e23922d1-6f43-4280-8ac6-131767dc4464">https://bionomia.net/dataset/e23922d1-6f43-4280-8ac6-131767dc4464</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/e23922d1-6f43-4280-8ac6-131767dc4464">https://gbif.org/dataset/e23922d1-6f43-4280-8ac6-131767dc4464</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: A time relic: a new species of dwarf boa, Tropidophis Bibron, 1840 (Serpentes: Amerophidia), from the Upper Amazon Basin.
Natural history specimen data linked to collectors and determiners held within, "A time relic: a new species of dwarf boa, Tropidophis Bibron, 1840 (Serpentes: Amerophidia), from the Upper Amazon Basin". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/9333695a-96ff-4ffe-a639-b75433682bee">https://bionomia.net/dataset/9333695a-96ff-4ffe-a639-b75433682bee</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/9333695a-96ff-4ffe-a639-b75433682bee">https://gbif.org/dataset/9333695a-96ff-4ffe-a639-b75433682bee</a>. Formatted as a Frictionless Data package.
Fig. 4 in A new genus and species of characid fish from the Amazon basin - the recognition of a relictual lineage of characid fishes (Ostariophysi: Cheirodontinae: Cheirodontini)
Fig. 4. Lateral view (left side) of the head of the holotype of Amazonspinther dalmata showing the pattern of neuromasts distribution (MCP 38623, 19.63 mm SL).
Fig. 2 in A taxonomic review of the species of Charax Scopoli, 1777 (Teleostei: Characidae: Characinae) with description of a new species from the rio Negro bearing superficial neuromasts on body scales, Amazon basin, Brazil
Fig. 2. Superficial neuromasts (black arrow) on ventral body scales of Charax metae, CAS 69117, 59 mm SL.
Figure 3 in First record of the enigmatic tribe Anaeomorphini Lepidoptera, Nymphalidae, Charaxinae) outside of the Amazon basin: a new species of Anaeomorpha Rothschild, 1894, from the Chocó region of western Ecuador
Figure 3. Distribution of Anaeomorpha, based on research in Ecuador by KRW and JPWH, and on additional localities in Salazar (2011), Schäffler and Frankenbach (2011), and May et al. (2014).
Figure 2. Anaeomorpha male genitalia. A–E. A. mirifica n in First record of the enigmatic tribe Anaeomorphini Lepidoptera, Nymphalidae, Charaxinae) outside of the Amazon basin: a new species of Anaeomorpha Rothschild, 1894, from the Chocó region of western Ecuador
Figure 2. Anaeomorpha male genitalia. A–E. A. mirifica n. sp., holotype, Ecuador, Esmeraldas, Río Chuchuví (genitalic dissection KW-15-167): A, dorsal view; B, lateral view (aedeagus omitted); C, aedeagus, lateral view; D, aedeagus, dorsal view; E, genitalia, posteroventral view. F–I. A. splendida splendida, Ecuador, Orellana, Estación Científica Yasuní (genitalic dissection KW-15-163): F, dorsal view (setae omitted from valvae); G, lateral view; H, aedeagus, dorsal view; I, genitalia, posteroventral view. J–M. A. splendida esmeralda, Peru, 'San Martín' (genitalic dissection GM-07-61): J, dorsal view (setae omitted); K, lateral view; L, aedeagus, dorsal view; M, genitalia, posteroventral view (setae omitted).
Figure 1. Anaeomorpha males. A–B. A. mirifica n in First record of the enigmatic tribe Anaeomorphini Lepidoptera, Nymphalidae, Charaxinae) outside of the Amazon basin: a new species of Anaeomorpha Rothschild, 1894, from the Chocó region of western Ecuador
Figure 1. Anaeomorpha males. A–B. A. mirifica n. sp., holotype, Ecuador, Esmeraldas, Río Chuchuví: A, dorsal surface; B, ventral surface. C. A. splendida splendida, Ecuador, Orellana, Río Tiputini: left, dorsal surface, right, ventral surface. D. A. splendida esmeralda, Peru, Huánuco, "Tingo María": left, dorsal surface, right, ventral surface. Apparently stable differences between A. s. esmeralda and the nominate subspecies include, in the former, the broader DFW green area, the darker brown ventral color, the black VFW medial line extending cleanly to the anal margin, and the slightly reduced white scaling towards the VHW distal margin (Attal and Büche 2008).
Fig. 3 in Description of a new species of Tetranematichthys (Siluriformes: Auchenipteridae) from the lower Amazon basin, Brazil
Fig. 3. Mandibular barbel of Tetranematichthys barthemi, MPEG 14565, 175.7mm SL, showing the fleshy serrated distal portion. Scale bar = 1mm.
Fig. 5 in Description of a new species of Tetranematichthys (Siluriformes: Auchenipteridae) from the lower Amazon basin, Brazil
Fig. 5. Ventral view of head and anterior portion of (a) Tetranematichthys barthemi, holotype, male, MPEG 11081, 154.2 mm SL; and (b) Tetranematichthys quadrifilis, MPEG 6535, 127.2 mm SL, showing the difference between the alignments of the postorbital portion of head.
Fig. 1 in Description of a new species of Tetranematichthys (Siluriformes: Auchenipteridae) from the lower Amazon basin, Brazil
Fig. 1. Tetranematichthys barthemi, holotype, male, MPEG 11081, 154.2 mm SL. (a) lateral, (b) dorsal, and (c) ventral views.
Fig. 4 in Ageneiosus uranophthalmus, a new species of auchenipterid catfish (Osteichthyes: Siluriformes) from river channels of the central Amazon basin, Brazil
Fig. 4. Drainage map of northern South America illustrating the geographic distribution of Ageneiosus uranophthalmus. Type locality represented by triangle. Some symbols represent more than one locality or lot of specimens. Base map by Marilyn Weitzman.
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