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FIGURE 15 in A new long-snouted Corydoras (Siluriformes: Callichthyidae) from the rio Xingu and rio Tapajós basins, Brazilian Amazon

FIGURE 15 | Collecting sites of Corydoras caramater, showing (A) the rio Bacajaí, (B) a small stream tributary of the rio Bacajá, both draining to the rio Xingu, and (C) the igarapé Sonrisal, a tributary of the rio Tapajós basin, all in Pará State, Brazil.

FIGURE 11 in A new long-snouted Corydoras (Siluriformes: Callichthyidae) from the rio Xingu and rio Tapajós basins, Brazilian Amazon

FIGURE 11 | General morphology of caudal skeleton in a c&s paratype of Corydoras caramater (LIA 1073, 41.6 mm SL), showing the small cartilage (black dotted line) between upper principal and procurrent caudal-fin rays. Abbreviations: ccc: compound caudal centrum, cfr: caudal-fin principal rays, dpcr: dorsal procurrent rays, epu: epural, has: haemal spine, hyp 1–5: hypurals 1 to 5, nes: neural spine, par: parhypural, pu 2–4: preural centra 2 to 4, un: uroneural, vpcr: ventral procurrent rays. Area where the illustrated bones are located in fish's body marked in red in the miniature drawing of the new species. Scale bar = 1 mm.

FIGURE 14 in A new long-snouted Corydoras (Siluriformes: Callichthyidae) from the rio Xingu and rio Tapajós basins, Brazilian Amazon

FIGURE 14 | Map showing the geographical distribution of Corydoras caramater in the rio Xingu basin (purple star: type-locality; white diamonds additional records), and in the rio Tapajós basin (yellow dot). Each symbol may represent more than one locality.

FIGURE 4 in A new long-snouted Corydoras (Siluriformes: Callichthyidae) from the rio Xingu and rio Tapajós basins, Brazilian Amazon

FIGURE 4 | Details on cranium osteological pattern in a c&s paratype of Corydoras caramater (LIA 1073, 35.9 mm SL), showing general morphology of (A) lateral ethmoid in lateral view, and of (B) mesethmoid in dorsal view. Abbreviations: f: frontal, le: lateral ethmoid, n: nasal, pes: pterotic-extrascapular, pso: parieto-supraoccipital, sph: sphenotic. Additional pore of the temporal sensory canal at sphenotic outlined in yellow. Area where the illustrated bones are located in fish's body marked in red in the miniature drawing of the new species. Scale bars = 1 mm.

Figs. 68-75 in O gênero Pinnularia Ehrenberg (Bacillariophyceae) em um lago de inundação do rio Tapajós (Lago Verde, Santarém, Pará, Brasil)

Figs. 68-75. Imagens em MEV. 68, 69. Pinnularia divergens var. mesoleptiformis.68. vista geral interna da valva; 69. vista interna da extremidade distal da rafe; 70- 72. P. instabilis. 70. vista externa das extremidades proximais da rafe na área central; 71. vista externa da extremidade distal da rafe; 72. vista geral externa da valva; 73 - 75. Imagens em MEV. 73. vista geral interna da valva; 74. vista interna da rafe na área central; 75. vista interna da extremidade distal da rafe. Barras: Figs. 68, 72 = 10μm; Figs. 69, 70, 71 = 2μm; Fig. 73 = 20μm; Fig. 74 = 5μm; Fig. 75 = 1μm.

Figs. 2-10 in O gênero Pinnularia Ehrenberg (Bacillariophyceae) em um lago de inundação do rio Tapajós (Lago Verde, Santarém, Pará, Brasil)

Figs. 2-10. Imagens em MO. 2, 3. Pinnularia acuminata var. novaezealandica; 4, 5. P. amazônica; 6. P. amoena; 7. P. aquaenigrae; 8. P. boyeriformis; 9. P. confirma; 10. P. discrepantia. Barra = 10 μm.

Figs. 23-30 in O gênero Pinnularia Ehrenberg (Bacillariophyceae) em um lago de inundação do rio Tapajós (Lago Verde, Santarém, Pará, Brasil)

Figs. 23-30. Imagens em MO. 23, 24. Pinnularia graciloides var. rumrichae; 25. P. hemipteriformis; 26. P. hyalina; 27. P. instabiliformis; 28. P. instabilis; 29. P. liyanlingae; 30. P. manausensis. Barra = 10 μm.

Figs. 86-90 in O gênero Pinnularia Ehrenberg (Bacillariophyceae) em um lago de inundação do rio Tapajós (Lago Verde, Santarém, Pará, Brasil)

Figs. 86-90. Imagens em MEV. 86 - 88. Pinnularia tumescens.86. vista interna da extremidade distal da rafe; 87. vista externa da extremidade distal da rafe; 88. vista externa das extremidades distais da rafe na área central; 89, 90. P. tupensis. 89. vista interna da extremidade distal da rafe; 90. vista geral interna da valva. Barras: Figs. 86, 90 = 10μm; Fig. 87 = 2μm; Figs. 88, 89 = 5μm.

Fig. 2 in New species of the catfish genus Tatia (Siluriformes:Auchenipteridae) from the rio Teles Pires, upper rio Tapajós basin, Brazil

Fig. 2. Life coloration of specimen of Tatia melanoleuca collected in rio Jamanxim, tributary to upper rio Tapajós basin. Photograph courtesy of Heriberto Gimenes Junior.

Fig. 1 in New species of the catfish genus Tatia (Siluriformes:Auchenipteridae) from the rio Teles Pires, upper rio Tapajós basin, Brazil

Fig. 1. Tatia melanoleuca, new species, MZUSP 114670, holotype, female, 32.4 mm SL, Brazil, along border between Pará and Mato Grosso states, Jacareacanga, rio Teles Pires, close to Sete Quedas, upper rio Tapajós basin; dorsal, lateral and ventral views. Scale bar = 0.5 cm.

Fig. 3 in Miniature catfishes of the genus Gelanoglanis (Siluriformes: Auchenipteridae): monophyly and the description of a new species from the upper rio Tapajós basin, Brazil

Fig. 3. Map of southeastern Amazon basin showing location of type locality of Gelanoglanis pan, 1 = rio Tapajós, 2 = rio Teles Pires, 3 = rio Juruena.

Fig. 2 in Miniature catfishes of the genus Gelanoglanis (Siluriformes: Auchenipteridae): monophyly and the description of a new species from the upper rio Tapajós basin, Brazil

Fig. 2. Gonopodium and osteology of the anal fin of an adult male of Gelanoglanis pan, holotype, 24.7 mm SL, MZUSP 114669, showing fusion of the proximal radials. DR = distal radials, G = gonopodium, PR = fused proximal radials, i-iii= anterior unbranched and unsegmented anal-fin rays. Scale bar = 1 mm.

Fig. 1. Gelanoglanis pan, MZUSP 114669 in Miniature catfishes of the genus Gelanoglanis (Siluriformes: Auchenipteridae): monophyly and the description of a new species from the upper rio Tapajós basin, Brazil

Fig. 1. Gelanoglanis pan, MZUSP 114669, holotype, male, 24.7 mm SL; Brazil, Mato Grosso State, Itaúba, rio Teles Pires, tributary to upper rio Tapajós basin; lateral views. Scale bar = 0.5 cm.

Fig. 4 in Miniature catfishes of the genus Gelanoglanis (Siluriformes: Auchenipteridae): monophyly and the description of a new species from the upper rio Tapajós basin, Brazil

Fig. 4. Lateral view of the mandibular arch of Gelanoglanis pan, MZUSP 96032, paratype, 20.2 mm SL. AA = anguloarticular, D = dentary, PM = premaxilla, LC = subdivided autogenous laterosensory canal. Scale bar = 0.5 mm.

Fig. 6 in A new miniature of Xenurobryconini (Characiformes: Characidae) from the rio Tapajós basin, Brazil

Fig. 6. ANCOVA plot showing the difference between pelvic-fin length of mature males and females of Xenurobrycon varii.

Fig. 7 in A new miniature of Xenurobryconini (Characiformes: Characidae) from the rio Tapajós basin, Brazil

Fig. 7. ANCOVA plot showing relation between snout to pelvic-fin length and SL of mature males and females of Xerunobrycon varii.

Fig. 8 in A new miniature of Xenurobryconini (Characiformes: Characidae) from the rio Tapajós basin, Brazil

Fig. 8. Map of portion of rio Tapajós basin, and adjoining areas, showing collecting sites (dark circles) and the type locality (white circle) of Xenurobrycon varii.

Fig. 4 in A new miniature of Xenurobryconini (Characiformes: Characidae) from the rio Tapajós basin, Brazil

Fig. 4. Xenurobrycon varii, anal-fin rays: (a) left side, MPEG 26591, male, 15.0 mm SL, with bilateral, antrorse hooks; (b) right side (inverted), MPEG 26592, male, 13.5 mm SL, with well-developed lamellar process on pterygiophores. Scale bars = 1 mm and 0.25 mm respectively.

Fig. 3. Xenurobrycon varii, MPEG 26591 in A new miniature of Xenurobryconini (Characiformes: Characidae) from the rio Tapajós basin, Brazil

Fig. 3. Xenurobrycon varii, MPEG 26591, male, 15.0 mm SL, left side of caudal-fin rays (pouch-scale removed): (a) bilateral, antrorse hooks, usually one pair per lepidotrichium segment (rectangle indicates magnified area represented in b); (b) set of lamellar processes on eighth principal caudal-fin ray of lower lobe, dashed lines represent the delimitation of left elements of paired ventral processes and dorsal unpaired process along ray segments 3 to 5 and 4 to 5, respectively. Scale bars = 1 mm and 0.25 mm respectively.

Fig. 1 in A new miniature of Xenurobryconini (Characiformes: Characidae) from the rio Tapajós basin, Brazil

Fig. 1. Xenurobrycon varii, new species, Brazil, Pará, Jacareacanga, Vila de Mamãe Anã, tributary of rio Tapajós. (a) MPEG 32825 holotype, male, 14.2 mm SL; (b) MPEG 26592, paratype, female, 13.2 mm SL.