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18 results for “Melanosternarchus”
FIGURE 16 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 16. Cephalic lateral line bones of Apteronotus bonapartii, ANSP 20045, 137 mm TL (A) and Compsaraia samueli, MUSM 54620, 161 mm TL (B). Abbreviations: ant, antorbital; io, infraorbital; na, nasal; otc, otic canal; mco, mandibular canal ossicles; pa, parietal canal; prc, preopercular canal; soc, supraorbital canal; stc, supratemporal canal.
FIGURE 18 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 18. Dorsal view of Melanosternarchus amaru, ANSP 200459 (A), Apteronotus bonapartii, MUSM 54641 (B), Pariosternarchus amazonensis, FMNH 128402 (C), Compsaraia samueli, MUSM 59454 (D), and Sternarchogiton labiatus MUSM 59452 (E). Scale bar equals 1 cm.
FIGURE 17 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 17. Medial view of the lower jaw in Melanosternarchus amaru, MUSM 59453 (A), Apteronotus bonapartii, MUSM 54641 (B), Pariosternarchus amazonensis, ANSP 192996 (C), Compsaraia samueli, MUSM 54620 (D). Scale bar equals 5 mm.
FIGURE 15 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 15. Phylogenetic position of Melanosternarchus (shaded) within Apteronotidae. Topology from maximum likelihood analysis of four concatenated loci (2946 bp). Bootstrap values shown only on nodes with support below 90 with 1000 replicates.
FIGURE 14 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 14. Photograph of type locality of Melanosternarchus amaru, the Rio Nanay upstream from Iquitos during low water (September, 2016). Photo by A. Orfinger.
FIGURE 11 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 11. Variation in displaced-hemal spines of Melanosternarchus amaru, MUSM 56870, 163 mm TL (A), FMNH 128388, 210 mm TL (B), and MUSM 59453, 214 mm TL (C). Abbreviations: adhs, anterior displaced hemal spine; hs, hemal spine; pp, parapophysis; pdhs, posteror displaced hemal spine.
FIGURE 13 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 13. Collection localities of Melanosternarchus amaru, star indicating type locality at Iquitos, Peru. Some points indicate multiple collections or lots from proximate locations.
FIGURE 12 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 12. Head-to-tail electric organ discharge (ht-EOD) waveform (A) and corresponding power spectral density (PSD) (B) for Melanosternarchus amaru, ZUEC 14195, specimen 1999-01-28-23, female, 272 mm TL; Paraná Maiana, rio Solimões- Japurá confluence, near Alvarães, Amazonas, Brazil. The ht-EOD waveform is plotted head-positive with relative voltage on the ordinate and absolute time on the abscissa. Horizontal dashed line denotes 0V. The PSDs is computed by 65536-point Fast Fourier Transform and is scaled to report the peak power frequency (PPF) at 0 decibels. The PPF at 1.884 kHz corresponds to the first harmonic. The dominant ht-EOD frequency is at 0.942 kHz.
FIGURE 10 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 10. Pectoral girdle of Melanosternarchus amaru (ANSP 20045) in lateral (A), and medial (B) views. Abbreviations: cl, cleithrum; co, coracoid; pcl, postcleithrum; pt, posttemporal; ptg, propterygium; ra, radial; sc, scapula; scl, supracleithrum.
FIGURE 9 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 9. Gill arches of Melanosternarchus amaru (ANSP 20045). Ventral arches (A) shown in dorsal view and dorsal arches (B) in ventral view. Abbreviations: bb, basibranchial; bh, basihyal, cb, ceratobranchial; eb, epibranchial; gr, gill raker; hb, hypobranchial; iph, infrapharyngobranchial; uptp, upper pharyngeal toothplate.
FIGURE 8 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 8. Ventral hyoid arch in lateral view (A) with branchiostegal 4 removed from normal position in order to show branchiostegal 3, and urohyal (B) in dorsal (left) and ventral views. Abbreviations: br, branchiostegal; cha, anterior ceratohyal; chp, posterior ceratohyal; hhd, dorsal hypohyal; hhv, ventral hypohyal.
FIGURE 7 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 7. Premaxillae of three specimens of Melanosternarchus amaru, ANSP 200459, 187 mm TL—shown in dorsal and ventral views and bearing a single tooth (A) and MUSM 59453, 214 mm TL, and C) MUSM 59453, 147 mm TL (B). Scale bar = 2.5 mm.
FIGURE 6 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 6. Suspensorium, opercular series, and maxilla of Melanosternarchus amaru (ANSP200459) in lateral (A) and medial (B, image reflected) view. 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; mx, maxilla; mco, mandibular canal ossicles; m, Meckel's cartilage; mpt, metapterygoid; op, opercle; pop, preopercle; q, quadrate; rar, retroarticular; sop, subopercle; sym, symplectic.
FIGURE 5 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 5. Illustrations of the neurocranium of Melanosternarchus amaru (ANSP 200459, 187 mm TL, male) in dorsal (A), ventral (B), and lateral (C) view. Cartilages shown in black. Abbreviations: bao, basioccipital; epo, epioccipital; exo, exoccipital; 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 3 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 3. Detail of the head of living Melanosternarchus amaru, ANSP 200459 (A) and cephalic lateral line bones of Melanosternarchus amaru, LSUMZ 20734, 237 mm TL (B). Abbreviations: ant, antorbital; io, infraorbital; na, nasal; otc, otic canal; mco, mandibular canal ossicles; pa, parietal canal; prc, preopercular canal; soc, supraorbital canal; stc, supratemporal canal.
FIGURE 4 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 4. CT scan of Melanosternarchus amaru, FMNH 128388, 210 mm TL in dorsal (A), ventral (B), and lateral (C) views.
FIGURE 1 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 1. Lateral view of Melanosternarchus amaru, holotype MUSM 59405, 230 mm TL.
FIGURE 2 in Melanosternarchus amaru, a new genus and species of electric ghost knifefish (Gymnotiformes: Apteronotidae) from the Amazon Basin
FIGURE 2. Lateral view of two living specimens of Melanosternarchus amaru, ANSP 200459.
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