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FIGURE 7 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 7 | Branchial arches of Eigenmannia catira, paratype, MZUSP 121047. A. Dorsal view, anterior on top; B. Ventral view anterior on top.

FIGURE 6 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 6 | Hyoid apparatus of Eigenmannia catira, paratype, MZUSP 121047. A. Urohyal, ventral view, anterior on top; B. Hyoid arch, inverted image, right side, lateral view anterior on left.

FIGURE 2 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 2 | Jaws of Eigenmannia catira, paratype, MZUSP 121047. A. Premaxilla, right side, ventral view, anterior on top; B. Lower jaw, inverted image, left side, medial view, anterior on left.

FIGURE 1 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 1 | Eigenmannia catira, holotype, MZUSP 129263, 132.7 mm LEA, São Paulo, Córrego do Schmidt, a tributary of the rio Grande, upper rio Paraná basin. A. Left lateral view of the head; B. Left lateral view of the body.

FIGURE 9 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 9 | Map of southeastern South America shows the distribution of Eigenmannia catira (black star for type-locality) in the upper rio Paraná basin, Brazil.

FIGURE 5 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 5 | Microcomputed tomography of head and body cavity of Eigenmannia catira, MZUSP 129263, holotype, left side, lateral view, anterior on left. Colors represent major subdivisions of bone complexes: jaws (purple), nasal, infrorbitals and extraexcapular (orange), suspensorium and opercular series (green), branchial and hyoid arches (red); neurocranium (garnet), Weberian apparatus (yellow), and pectoral girdle (blue).

FIGURE 8 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 8 | Pectoral girdle and fin of Eigenmannia catira, paratype, MZUSP 121047, inverted image, right side, medial view, anterior on left.

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.

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FIGURE 2 in Feeding ecology of electric eel Electrophorus varii (Gymnotiformes: Gymnotidae) in the Curiaú River Basin, Eastern Amazon

FIGURE 2 | Variation in Stomach Repletion Index (RI) values (black spots) of Electrophorus varii in Curiaú River EPA Amapá, Brazil. A. Size class; and B. Season. The lower and upper bars of the boxplot represent 25 and 75 quartiles, respectively. The horizontal bar within each boxplot represents the mean RI value. The lower and upper vertical line represent the RI values amplitude.

FIGURE 14 in A redescription of deep-channel ghost knifefish, Sternarchogiton preto (Gymnotiformes: Apteronotidae), with assignment to a new genus

FIGURE 14 | Sample of diversity of maxilla shape in Apteronotidae, emphasizing the Navajini. Maxillae are illustrated in lateral view and are not drawn to scale.

FIGURE 12 in A redescription of deep-channel ghost knifefish, Sternarchogiton preto (Gymnotiformes: Apteronotidae), with assignment to a new genus

FIGURE 12 | Collection localities of Tenebrosternarchus preto, star indicating type locality. Some points indicate multiple collections or lots from proximate locations.

FIGURE 4 in A redescription of deep-channel ghost knifefish, Sternarchogiton preto (Gymnotiformes: Apteronotidae), with assignment to a new genus

FIGURE 4 | Suspensorium, opercular series, and lower jaw of Tenebrosternarchus preto, MUSM 54617 (198 mm TL) in A. lateral and B. medial view (image reflected). Thin, unstained hard tissue associated with opercular bones shown in light gray. Abbreviations: ang, anguloarticular; ap, autopalatine cartilage; cm, coronomeckelian; d, dentary; enp, endopterygoid; h, hyomandibula; iop, interopercle; m, Meckel's cartilage; mpt, metapterygoid; op, opercle; pop, preopercle; q, quadrate; rar, retroarticular; sym, symplectic.

FIGURE 3 in A redescription of deep-channel ghost knifefish, Sternarchogiton preto (Gymnotiformes: Apteronotidae), with assignment to a new genus

FIGURE 3 | Illustrations of the neurocranium of Tenebrosternarchus preto MUSM 54617 (198 mm TL) in dorsal A., ventral B., and lateral C. views. Cartilage shown in black. Abbreviations: bao, basioccipital; epo, epioccipital; fro, frontal; let, lateral ethmoid; met, mesethmoid; obs, orbitosphenoid; par, parietal; pas, parasphenoid; pro, prootic; pto, pterotic; pts, pterosphenoid; soc, supraoccipital; spo, sphenotic; vet, ventral ethmoid; vom, vomer.

FIGURE 1 in A redescription of deep-channel ghost knifefish, Sternarchogiton preto (Gymnotiformes: Apteronotidae), with assignment to a new genus

FIGURE 1 | Lateral view of live Tenebrosternarchus preto. A. MUSM 54656 (243 mm TL) from the río Amazonas at Iquitos, Peru; B. ANSP 207797 (232 mm TL) from the rio Negro downstream from Barcelos, Brazil; and C. Detail of the head of ANSP 207797 (232 mm TL).

Fig. 6 in Population density and habitat of an endangered cave fish Eigenmannia vicentespelaea Triques, 1996 (Ostariophysi: Gymnotiformes) from a karst area in central Brazil

Fig. 6. Population densities of Eigenmannia trilineata from rio da Lapa, São Domingos karst area, central Brazil, observed from dusk until night phase during two nights (April and August 2001). Asterisk indicates that no sample was recorded in this period at April 2001.

Fig. 4 in Population density and habitat of an endangered cave fish Eigenmannia vicentespelaea Triques, 1996 (Ostariophysi: Gymnotiformes) from a karst area in central Brazil

Fig. 4. Box-plots showing the means and standard deviations (Sd) of population densities data for Eigenmannia vicentespelaea along the years 1999, 2000 and 2001 (a) and between the dry seasons, independent of the years (b) BDS, beginning of dry season; MDS, middle of dry season; EDS, end of dry season.

Fig. 7 in Population density and habitat of an endangered cave fish Eigenmannia vicentespelaea Triques, 1996 (Ostariophysi: Gymnotiformes) from a karst area in central Brazil

Fig. 7. Box-plots showing means and standard deviations of pH (a) conductivity (b) and temperature (c) from the São Vicente II cave stream in the dry seasons of 1999, 2000 and 2001 (circle and asterisk represent outliers).

Fig. 3 in Population density and habitat of an endangered cave fish Eigenmannia vicentespelaea Triques, 1996 (Ostariophysi: Gymnotiformes) from a karst area in central Brazil

Fig. 3. Monthly rainfall recorded in the years of 1999, 2000 and 2001. Source: INMET, Posse municipality, Goiás State, central Brazil.

Fig. 5 in Population density and habitat of an endangered cave fish Eigenmannia vicentespelaea Triques, 1996 (Ostariophysi: Gymnotiformes) from a karst area in central Brazil

Fig. 5. Biplot resulting from Principal Component Analysis with seven variables. Dark circles represent sampling units.