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96 results for “Sternopygidae”
FIGURE 4 in Description of a new species of glass knifefish genus Eigenmannia (Gymnotiformes: Sternopygidae) from the upper rio Paraná basin, based on anatomical, karyotypic, and molecular evidences
FIGURE 4 | Infraorbitals of Eigenmannia catira, paratype, MZUSP 121047, left side, lateral view, anterior on left.
FIGURE 10 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 10 | Sternopygus sarae neurocranium 3D rendering from micro-CT scan of holotype, ANSP 209718. A. Dorsal view; B. Lateral view; C. Ventral view. The enlarged canal bones fused to the frontal and parietal bones of the neurocranium were included in those segments. Scale bar = 1 cm.
FIGURE 7 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 7 | Histogram of specimen sizes, reported in LEA, of all 46 specimens comprising the type series of Sternopygus sarae.
FIGURE 5 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 5 | Micro-CT renderings of the ventral surface of the neurocrania of three species of Sternopygus with the endopterygoid highlighted in red. A. Sternopygus astrabes, INHS 61503; B. Sternopygus obtusirostris, INPA 6430; C. Sternopygus sarae, ANSP 209718. Arrows indicate ridges along ventral surface of endopterygoid in S. astrabes and S. obtusirostris, which are not present in S. sarae. Note: the presence of the ridges is not a function of body size. Scale bars = 5 mm.
FIGURE 4 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 4 | Ridgeline plots of relative head length (HL%) and relative body depth (BD%) as a percentage of LEA for three sympatric Sternopygus species in the Guiana Shield region. Dark red regions indicate values outside 95% confidence interval from the mean; light red indicates overlapping values outside the 95% confidence interval.
FIGURE 13 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 13 | Sternopygus sarae Weberian apparatus 3D rendering from micro-CT scan of holotype, ANSP 209718. A. Dorsal view; B. Lateral view; C. Ventral view. Scale bar = 5 mm.
FIGURE 15 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 15 | Body-shape variation and diversity in 91 specimens representing three sympatric species of Sternopygus from the Guiana Shield. A. PC1 transformation grid of all 91 specimens. Ball-and-stick icons indicate direction of variance with balls indicating lower PC1 values. B. Morphospace of the first two PCs accounting for 71.3% of total body shape variance. Note: Relatively little overlap in the morphospace occupied by each taxon, indicating that each of these named species possesses a distinct body shape. The species do not separate on PC2. PC2 is not interpreted to be biologically relevant.
FIGURE 9 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 9 | A. Line drawing of five paratype specimens of Sternopygus sarae (ANSP 160357). Top two drawings depict typical coloration pattern, lower three drawings depict uncommon variations of pigmentation seen in preserved specimens. Scale bar = 1 cm. Bars (B1–B3) are composed of less densely arranged chromatophores that have larger diameters. Interbars (I1, I2) are composed of more densely arranged chromatophores that have smaller diameters. Homologous chromatophore fields with barred and interbarred regions are labeled for all four of the barred Sternopygus species. B. Close-up of specimen showing differences of size and density of chromatophores making up the bar and interbar regions. Note: bar appearance differs when viewed at whole body vs close-up such that pigment patches with large chromatophores and large inter-chromatophore spaces appear darker when specimen is viewed as a whole (e.g., at arms distance, panel A as compared to lighter when viewed close up panel B).
FIGURE 6 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 6 | Diagram of cephalic sensory canal pore configuration of the head in left lateral view of Sternopygus sarae, ANSP 160357, paratype, 274 mm TL. Lateral sensory pores indicated by circles. Centerline of canals estimated by dashed lines. Anterior and posterior nares shaded gray. Supraorbital (so), infraorbital (io), posterior (pl), preopercular-mandibular (pm), and supratemporal (st) laterosensory canals. so0 indicates the otic canal. Scale bar = 1 cm.
FIGURE 12 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 12 | Sternopygus sarae pectoral girdle 3D rendering from micro-CT scan of holotype, ANSP 209718. A. Lateral view of left side; B. Medial view of same side. Scale bar = 5 mm.
FIGURE 3 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 3 | Sternopygus sarae, holotype, ANSP 209718, male, 407 mm TL. A. Full body; B. Closeup of head. Scale bar = 1 cm.
FIGURE 11 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 11 | Sternopygus sarae suspensorium and opercular series 3D rendering from micro-CT scan of holotype, ANSP 209718. A. Lateral view of left side; B. Medial view of same side (reversed). Scale bar = 5 mm.
FIGURE 8 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 8 | Full body photographs of three valid and sympatric species of Sternopygus from the Orinoco River drainage A. Sternopygus macrurus, ANSP 209719 (192 mm TL); B. Sternopygus sarae, ANSP 160357 (216 mm TL); C. Sternopygus astrabes, INHS 61503 (228 mm TL). Scale bars = 1 cm.
FIGURE 14 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 14 | Locality collection map of all known lots of Sternopygus sarae (red) and selected S. astrabes (blue) lots from the Orinoco River drainage. Holotypes indicated by a star. Symbols may represent more than one collection.
FIGURE 2 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 2 | Landmark scheme used in geometric morphometric analyses. Landmarks indicated by small red circles, pseudolandmarks by small blue circles. Landmarks described in Tab. 2. Body depth (BD) measured at 25% and 75% LEA to calculate Taper Ratio (TR). Photograph of S. macrurus, ANSP 209719.
FIGURE 1 in A new species of barred Sternopygus (Gymnotiformes: Sternopygidae) from the Orinoco River
FIGURE 1 | Four species of barred Sternopygus. A. Sternopygus astrabes, ANSP 162663 (189 mm TL); B. Sternopygus n. sp., ANSP 160357 (284 mm TL, paratype); C. Juvenile Sternopygus sabaji, ANSP 189018 (146 mm TL); D. Juvenile Sternopygus obtusirostris, INPA 15787 (180 mm TL), photo taken at night from Crampton et al. (2004b). Dark outlines added to bars/saddles in all photos for emphasis. Scale bars = 1 cm.
Figure 4. - Distocyclus goajira. Holotype USNM 121596. X in Distocyclus guchereauae a new species of Neotropical electric fish, (Gymnotiformes: Sternopygidae), from French Guiana
Figure 4. - Distocyclus goajira. Holotype USNM 121596. X-ray. The anal fin ends (arrow) at the level of the "last caudal vertebra/caudal bony rod" (arrowhead) indication of the a regenerated tail. Scale bar = 50 mm.
Figure 3. - Distocyclus guchereauae. Paratypes X in Distocyclus guchereauae a new species of Neotropical electric fish, (Gymnotiformes: Sternopygidae), from French Guiana
Figure 3. - Distocyclus guchereauae. Paratypes X-ray (MNHN 2003-0018). Upper specimen normal (331 mm TL); lower specimen regenerated (322 mm TL). In the regenerated tail, an ossified rod developed from the 65th vertebra and replaced caudal vertebrae; the regenerated anal rays stopped at the anterior part of the rod. Arrows point to the end of the anal fin; arrowheads point to the articulation of the bony rod with the last true vertebrae.
Figure 1. - Distocyclus guchereauae. Holotype MNHN 2000-5927, 271 in Distocyclus guchereauae a new species of Neotropical electric fish, (Gymnotiformes: Sternopygidae), from French Guiana
Figure 1. - Distocyclus guchereauae. Holotype MNHN 2000-5927, 271 mm TL, Maroni, French Guiana; A: Photograph (C. Ferrara); B: X-ray.
Figure 2. - Distocyclus guchereauae. Paratypes X-ray. A in Distocyclus guchereauae a new species of Neotropical electric fish, (Gymnotiformes: Sternopygidae), from French Guiana
Figure 2. - Distocyclus guchereauae. Paratypes X-ray. A: MNHN 2003- 0014; B: MNHN 2003-0013. Detail of the posterior abdominal region showing respectively three and four rib-like bones (arrowheads). The arrow points to the first hemal spine. Scale bars = 10 mm.
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