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901 results for “Amazon Basin”
FIGURE 4. a in Moenkhausia restricta, a new species from the upper Rio Negro, Amazon basin, northwestern Brazil (Characiformes: Characidae)
FIGURE 4. a) Jupiaba zonata, LBP 16924, 38.1 mm SL; and b) Moenkhausia restricta LBP 7066, 40.2 mm SL.
FIGURE 3 in Moenkhausia restricta, a new species from the upper Rio Negro, Amazon basin, northwestern Brazil (Characiformes: Characidae)
FIGURE 3. Map of northwestern Amazon basin showing the type locality of Moenkhausia restricta (yellow star).
FIG. 10 in Description of a New Blind and Rare Species of Xyliphius (Siluriformes: Aspredinidae) from the Amazon Basin Using High-Resolution Computed Tomography
FIG. 10. Distributions of valid species of Xyliphius based on museum specimens and literature accounts (Alonso de Arámburu and Arámburu, 1962; Orcés, 1962; Taphorn and Marrero, 1993; Maldonado-Ocampo et al., 2005; Figueiredo and Britto, 2010; Ohara and Zuanon, 2013). Black triangles ¼ X. kryptos; white triangles ¼ X. magdalenae; white circles ¼ X. melanopterus; black circles ¼ X. lepturus; star ¼ X. sofiae; black squares ¼ X. barbatus; white diamonds ¼ X. anachoretes; circles half black, half white mark localities where X. melanopterus and X. lepturus were collected together.
FIG. 7 in Description of a New Blind and Rare Species of Xyliphius (Siluriformes: Aspredinidae) from the Amazon Basin Using High-Resolution Computed Tomography
FIG. 7. HRXCT model of suspensorium plus lower jaw (A) and hyoid arch (B–C) of Xyliphius sofiae, ANSP 182322, 44.1 mm SL. ach: anterior ceratohyal; ang: anguloarticular; br: branchiostegal rays; den: dentary; en: endopterygoid; hyo: hyomandibula; ih: interhyal; iop: interopercle; mc: mandibular canal tubules; met: metapterygoid; op: opercle; pch: posterior ceratohyal; pop: preopercle; qu: quadrate; ret: retroarticular; sup: suprapreopercle; uh: urohyal; vh: ventral hypohyal. Scale bar ¼ 2 mm.
FIG. 4 in Description of a New Blind and Rare Species of Xyliphius (Siluriformes: Aspredinidae) from the Amazon Basin Using High-Resolution Computed Tomography
FIG. 4. HRXCT model of skull and anterior body of Xyliphius sofiae, ANSP 182322, holotype, 44.1 mm SL. (A) Dorsal view. (B) Lateral view of left side. ang: anguloarticular; at: antorbital tubule; br: branchiostegal rays; cl: cleithrum; co: scapulocoracoid; cv: complex vertebrae; den: dentary; en: endopterygoid; epo: epioccipital; ex: extrascapular; fr: frontal; hyo: hyomandibula; ih: interhyal; io1: infraorbital 1; iop: interopercle; iot: infraorbital tubules; lal: lateral line tubules; let: lateral ethmoid; mc: mandibular canal tubules; mes: mesethmoid; met: metapterygoid; mnp: middle nuchal plate; mx: maxilla; na: nasal; op: opercle; pal: autopalatine; pch: posterior ceratohyal; pfr: pectoral-fin rays; pmx: premaxilla; po: preopercle; ps: pectoral-fin spine; pto: pterotic; pv5: parapophysis of vertebra five; qu: quadrate; rad: pectoral-fin radial; rb6: rib six; ret: retroarticular; sc: posttemporal-supracleithrum; soc: supraoccipital; spo: sphenotic; sup: suprapreopercle; v6: vertebrae six. Scale bar ¼ 2 mm.
FIG. 3 in Description of a New Blind and Rare Species of Xyliphius (Siluriformes: Aspredinidae) from the Amazon Basin Using High-Resolution Computed Tomography
FIG. 3. Ventral view of head. (A) Xyliphius sofiae, ANSP 182322, holotype, 44.1 mm SL. (B) X. melanopterus, FMNH 99495, 120.4 mm SL. (C) X. lepturus, ANSP 128941, 94.5 mm SL. (D) X. barbatus, MLP 6798, 92.0 mm SL. Photos by M. Sabaj.
FIG. 8 in Description of a New Blind and Rare Species of Xyliphius (Siluriformes: Aspredinidae) from the Amazon Basin Using High-Resolution Computed Tomography
FIG. 8. HRXCT model of branchial arches (A–B, left side, dorsal view, anterior up), and 5th ceratobranchial of cleared and stained specimens (left side, dorsal view, anterior up). (A) Xyliphius sofiae, ANSP 182322, holotype, 44.1 mm SL (scale bar ¼ 2 mm). (B) Unobscured dorsal view of 5th ceratobranchial in ANSP 182322 (scale bar ¼ 1 mm). (C) Xyliphius lepturus, FMNH 99488, 72.1 mm SL (scale bar ¼ 1 mm). (D) Xyliphius melanopterus, FMNH 99493, 81.9 mm SL (scale bar ¼ 1 mm). bb: basibranchial; cb: ceratobranchial; cb5: ceratobranchial five; eb: epibranchial; hb: hypobranchial; pb: pharyngobranchial; tp: tooth patch.
FIG. 2 in Description of a New Blind and Rare Species of Xyliphius (Siluriformes: Aspredinidae) from the Amazon Basin Using High-Resolution Computed Tomography
FIG. 2. Lateral view of select species of Xyliphius. (A) X. barbatus, MLP 6798, holotype, 92.0 mm SL. (B) X. lepturus, ANSP 128941, 94.5 mm SL. (C) X. magdalenae, CZUT-IC 1288, 75 mm SL. (D) X. melanopterus, FMNH 99495, 120.4 mm SL. (E) X. kryptos, MCNG 27310, 112.0 mm SL. Photos by M. Sabaj (A), T. Carvalho (B, E), J. Garcia-Melo (C), and A. Thomaz (D).
FIG. 6 in Description of a New Blind and Rare Species of Xyliphius (Siluriformes: Aspredinidae) from the Amazon Basin Using High-Resolution Computed Tomography
FIG. 6. HRXCT model of select bones in Xyliphius sofiae, ANSP 182322, holotype, 44.1 mm SL. Bones associated with the anterior cephalic canals of the lateral line system (anterior is left) in dorsal (A) and lateral (B) views. Entire lateral ethmoid (anterior is left) in ventral (C) and frontal (D) view. (E) Partial lateral ethmoid in dorsal view cut to about half of its depth (anterior is left). (F) Partial lateral ethmoid in frontal view cut to about vertical through origin of lateral process. at: antorbital tubule; i1–i6: infraorbital branches one to six; io1: infraorbital one; iot: infraorbital tubules; lp: lateral process of lateral ethmoid; na: nasal; obc: olfactory bulb chamber; s1–s3: supraorbital branches one to three. Scale bar ¼ 2 mm.
FIG. 1 in Description of a New Blind and Rare Species of Xyliphius (Siluriformes: Aspredinidae) from the Amazon Basin Using High-Resolution Computed Tomography
FIG. 1. Holotype of Xyliphius sofiae, ANSP 182322, 44.1 mm SL, Río Amazonas in vicinity of Iquitos, Loreto, Peru. (A–C) Alcohol preserved (scale bar ¼ 5 mm). (D) Live. Photos by M. Sabaj.
FIG. 9 in Description of a New Blind and Rare Species of Xyliphius (Siluriformes: Aspredinidae) from the Amazon Basin Using High-Resolution Computed Tomography
FIG. 9. Ventral view of Weberian complex in select species of Xyliphius (anterior is top). (A) X. lepturus, FMNH 99488, 72.1 mm SL. (B) X. melanopterus, FMNH 99493, 81.9 mm SL. (C) Xyliphius sofiae, ANSP 182322, 44.1 mm SL. cv: complex vertebra; gbc: gas bladder chamber (line points to portion encapsulated by bone in B); hc: hemal canal; in: intercalarium; lal: lateral line tubules; pcv: parapophysis complex vertebra; pv5: parapophysis vertebra five; r6: rib 6; sc: scaphium; tr: tripus; v6: vertebra six. Scale bar ¼ 2 mm.
FIGURE 4 in A new subterranean species of PHREATOBIUS Goeldi, 1905 (Siluriformes, INCERTAE SEDIS) from the Southwestern Amazon basin
FIGURE 4: A. Well at type locality where specimens of Phreatobius dracunculus were collected on Sep 2005 and Oct 2006, 5 m depth, settlement of Rio Pardo, Porto Velho, State of Rondônia, Brazil. Arrow indicates area shown at close range in B; B. Details of ferruginous lateritic in contact with water. Photos J. Zuanon and J.M. Cunha.
FIGURE 5 in A new subterranean species of PHREATOBIUS Goeldi, 1905 (Siluriformes, INCERTAE SEDIS) from the Southwestern Amazon basin
FIGURE 5: Phreatobius dracunculus, MZUSP 91680, paratype 38.1 mm SL. Radiograph of head and anterior portion of trunk, dorsoventral view.
FIGURE 3 in A new subterranean species of PHREATOBIUS Goeldi, 1905 (Siluriformes, INCERTAE SEDIS) from the Southwestern Amazon basin
FIGURE 3: A. Phreatobius dracunculus, MZUSP 93955, Holotype 36.0 mm SL eating live earthworm; B. MZUSP 93958, Paratype 31.2 mm SL in vertical position. Photos: E. Baena and J.M. Cunha.
FIGURE 1 in A new subterranean species of PHREATOBIUS Goeldi, 1905 (Siluriformes, INCERTAE SEDIS) from the Southwestern Amazon basin
FIGURE 1: Phreatobius dracunculus, Holotype, 36.0 mm SL; lateral view; dorsal view of body; and ventral view of live sedated specimen. Photo: L.M. Sousa.
FIGURE 25 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 25: Dorsal (A, C) and ventral (B, D) views of Plesiotrygon cf. iwamae (Río Amazonas, near Tamshiyacu, Loreto Department, Peru). A, B) MUSM 39977 (juvenile male, 221 mm DL, 211 mm DW). C, D) MUSM 39977 (juvenile male, 206 mm DL, 195 mm DW).
FIGURE 27 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 27: Anterior disc and head region depicting relative proportions of eyes and spiracles in (A) subadult male paratype of Plesiotrygon nana sp. nov. (MUSM 40243, 174 mm DL, 170 mm DW), and (B) juvenile male Plesiotrygon cf. iwamae (MUSM 39977, 221 mm DL, 211 mm DW). Scale bar in A = 1 cm; B = 2 cm.
FIGURE 26 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 26: Morphological details of Plesiotrygon cf. iwamae. A, B) Dorsal view of anterior disc and head region. C, D) Nasoral region. E) Ventral view of pelvic fins and claspers. A, C and E based on MUSM 39977 (juvenile male, 206 mm DL, 195 mm DW); B and D from MUSM 39977 (juvenile male, 221 mm DL, 211 mm DW). Scale bar = 2 cm.
FIGURE 22 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 22: Dermal denticles in Plesiotrygon iwamae from central disc region. A) MZUSP 108706 (350 mm DL, 355 mm DW). B) MZUSP 108776 (396 mm DL, 398 mm DW).
FIGURE 24 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 24: Skeleton and dermal covering in paratype of Plesiotrygon iwamae (FMNH 94500, adult female, 565 mm DL). A) Splanchnocranium and scapular region. B) Close-up of angular cartilage. C) Base of tail region showing arrangement of dorsal spines and denticles. Abbreviations: AC, angular cartilage; AOC, antorbital cartilage; HYO, hyomandibula; MC, Meckel's cartilage; MES, mesopterygium; NA, nasal aperture; POP, postorbital process; PQ, palatoquadrate; PRO, propterygium; SC, spiraclular cartilage (anterior); SCP, scapulocoracoid.
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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
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OpenNeuro
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