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23 results for “Otophysi”
Fig. 1. Santanichthys diasii, specimen AMNH 19439 in Redescription of Santanichthys diasii (Otophysi, Characiformes) from the Albian of the Santana Formation and Comments on Its Implications for Otophysan Relationships
Fig. 1. Santanichthys diasii, specimen AMNH 19439, photograph and drawing of the head in lateral view.
Fig. 8 in Redescription of Santanichthys diasii (Otophysi, Characiformes) from the Albian of the Santana Formation and Comments on Its Implications for Otophysan Relationships
Fig. 8. Santanichthys diasii: (A) specimen AMNH 19439; (B) restoration of the entire skeleton, the head is slightly inclined to see the fontanelle; (C) restoration of the fish as living.
Fig. 2. Santanichthys diasii, specimen AMNH 20050 in Redescription of Santanichthys diasii (Otophysi, Characiformes) from the Albian of the Santana Formation and Comments on Its Implications for Otophysan Relationships
Fig. 2. Santanichthys diasii, specimen AMNH 20050, photograph and drawing of the head in lateral view.
Fig. 3. Santanichthys diasii, specimen AMNH 20062 in Redescription of Santanichthys diasii (Otophysi, Characiformes) from the Albian of the Santana Formation and Comments on Its Implications for Otophysan Relationships
Fig. 3. Santanichthys diasii, specimen AMNH 20062, suspensorium, lower jaw, and part of the neurocranium.
Fig. 6. Santanichthys diasii, AMNH 20064 in Redescription of Santanichthys diasii (Otophysi, Characiformes) from the Albian of the Santana Formation and Comments on Its Implications for Otophysan Relationships
Fig. 6. Santanichthys diasii, AMNH 20064, photograph and drawing of the elements of the neurocranium, the branchial skeleton and the Weberian apparatus.
Fig. 5. Santanichthys diasii, AMNH 20052 in Redescription of Santanichthys diasii (Otophysi, Characiformes) from the Albian of the Santana Formation and Comments on Its Implications for Otophysan Relationships
Fig. 5. Santanichthys diasii, AMNH 20052, photograph and drawing of the Weberian apparatus and some details of the skull.
Fig. 4 in Redescription of Santanichthys diasii (Otophysi, Characiformes) from the Albian of the Santana Formation and Comments on Its Implications for Otophysan Relationships
Fig. 4. Santanichthys diasii, photograph and drawing of the Weberian apparatus and posterior part of the skull in AMNH 20068. The lagenar capsules are indicated by the white arrow.
Fig. 3 in Previously undescribed dental arrangement among electric knifefishes, with comments on the taxonomic and conservation status of Tembeassu marauna Triques (Otophysi: Gymnotiformes: Apteronotidae)
Fig. 3. Radiograph (inverted) showing the left side of the anterior region of head of the male paratype of Tembeassu marauna (MZUSP 23090), also exhibiting the conspicuous forward extension of the fleshy ("boneless") portions of the upper and lower jaws, in front of the premaxillary (PM) and dentary bones (DE), respectively. Additional abbreviations as in Figure 2. Arrow at left indicates the patch of extra teeth loosely attached to soft tissue at the roof of oral cavity, in front of the premaxillary bones, at the anteriorly extended portion of the upper jaw. Scale bar ~ 5 mm.
Fig. 4 in Previously undescribed dental arrangement among electric knifefishes, with comments on the taxonomic and conservation status of Tembeassu marauna Triques (Otophysi: Gymnotiformes: Apteronotidae)
Fig. 4. Radiograph (inverted) showing a detail of the left side of the upper jaw region of the female paratype of Tembeassu marauna (MZUSP 23090). Arrow at left indicates the patch of extra teeth at the anteriorly extended "boneless" portion of snout, loosely attached to soft tissue in front of the premaxillary bones (PM). Additional abbreviations as in Figure 2 (above; both maxillary bones noticed). Scale bar ~ 5 mm.
Fig. 2 in Previously undescribed dental arrangement among electric knifefishes, with comments on the taxonomic and conservation status of Tembeassu marauna Triques (Otophysi: Gymnotiformes: Apteronotidae)
Fig. 2. Radiograph (inverted) showing skeletal structures at the anterior portion of head of the holotype of Tembeassu marauna (MZUSP 48510). Arrow at left indicates the patch of extra teeth inside the mouth (roof of the oral cavity), loosely attached to soft tissue in front of the premaxillary bones (PM). Additional abbreviations are as follows: AN = anguloarticular; DE = dentary; EN = endopterygoid; FR = frontal; LE = lateral ethmoid; ME = mesethmoid; MX = maxilla; PS = pterosphenoid; VO = vomer (ventral ethmoid). Scale bar ~ 5 mm.
Fig. 7 in Redescription of Santanichthys diasii (Otophysi, Characiformes) from the Albian of the Santana Formation and Comments on Its Implications for Otophysan Relationships
Fig. 7. Santanichthys diasii, restoration of what is known of the Weberian apparatus.
Fig. 10. Santanichthys diasii, AMNH 12826 in Redescription of Santanichthys diasii (Otophysi, Characiformes) from the Albian of the Santana Formation and Comments on Its Implications for Otophysan Relationships
Fig. 10. Santanichthys diasii, AMNH 12826, caudal skeleton.
Fig. 9. Santanichthys diasii, AMNH 20068 in Redescription of Santanichthys diasii (Otophysi, Characiformes) from the Albian of the Santana Formation and Comments on Its Implications for Otophysan Relationships
Fig. 9. Santanichthys diasii, AMNH 20068, caudal skeleton.
Fig. 1 in Previously undescribed dental arrangement among electric knifefishes, with comments on the taxonomic and conservation status of Tembeassu marauna Triques (Otophysi: Gymnotiformes: Apteronotidae)
Fig. 1. Holotype of Tembeassu marauna (MZUSP 48510), left side of head. Scale bar ~ 5 mm.
Early biogeography of Otophysi points to the Neotropics as the cradle of Characiphysan fishes
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The role of abiotic and biotic factors in the unequal body shape diversification of a Gondwanan fish radiation (Otophysi:Characiformes)
<p>Understanding why some clades diversify greatly, while others do not, is a major goal of evolutionary biology. Both abiotic and biotic factors are important in driving unequal morphological diversity across the tree of life. However, few studies have quantified how differences in abiotic habitat and community composition influence unequal morphological diversification in spatiotemporally diffuse radiations. Here we use geometric morphometrics, abiotic habitat data generated by Geographic Information Systems (GIS) analyses, evolutionary simulations, and phylogenetic comparative methods to determine whether random evolution, habitat variation, competition for niches or a combination of factors influenced the unequal body shape diversity of a Gondwanan freshwater fish radiation. We find that neotropical characiform lineages, which exhibit substantially more body shape diversity than their African counterparts, occupy significantly more slope and elevation habitats than African lineages. Differences in habitat occupation between the continental radiations occur by a combination of competition with cypriniform fishes in Africa restricting access to higher slope and elevation habitats and significantly more low elevation and slope habitat available in the neotropics. Our findings suggest that spatiotemporally widespread radiations, like the Characiformes, do not diversify across homogenized habitats and biotic assemblages, with differences in community structure and physical habitat important in driving unequal morphological diversification. </p>
The role of abiotic and biotic factors in the unequal body shape diversification of a Gondwanan fish radiation (Otophysi:Characiformes)
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Fig. 4 in Diet and body shape among populations of Bryconamericus iheringii (Otophysi: Characidae) across the Campos Sulinos ecosystem
Fig. 4. Partial least squares canonical analysis depicting the covariation between: a. dietary (blue) and environmental (brown) variables; b. morphological (orange) and environmental (brown) variables; c. dietary (blue) and morphological variables (orange). Variables near the edge of the circle are better represented by the model. Variables near one another are positively correlated, whereas variables opposite one another are negatively correlated. Uncorrelated variables are orthogonal.
Fig. 3 in Diet and body shape among populations of Bryconamericus iheringii (Otophysi: Characidae) across the Campos Sulinos ecosystem
Fig. 3. Relative warps (RW) of body shapes among 22 populations of Bryconamericus iheringii: Alegrete (AL), Jaguarão (JG), Santo Antônio das Missões (SM), São Gabriel (SG), Santiago (ST), São Pedro do Sul (SS), Soledade (SL), Quaraí (QR), Santana da Boa Vista (SV) and Lavras do Sul (LV). Warp transformation grids depict the body shapes associated with the extremes of each axis.
Fig. 2 in Diet and body shape among populations of Bryconamericus iheringii (Otophysi: Characidae) across the Campos Sulinos ecosystem
Fig. 2. Individual of Bryconamericus iheringii (UFRGS 21339) with the landmarks used for geometric morphometric. 1 = Tip of snout; 2 = Top of head (at the supraoccipital bone); 3 = Anterior insertion of dorsal fin; 4 = Posterior insertion of dorsal fin; 5 = Posterior insertion of adipose fin; 6 = Dorsal end of caudal peduncle; 7 = Ventral end of caudal peduncle; 8 = Posterior insertion of anal fin; 9 = Anterior insertion of anal fin; 10 = Origin of pelvic fin; 11 = Origin of pectoral fin; 12 = Ventral end of head; 13 = Tip of the upper jaw (maxillary bone); 14 = Anterior margin of eye; 15 = Posterior margin of eye; 16 = Anterior margin of opercule.
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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
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.