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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.

Fig. 5. Xenurobrycon varii, MPEG 25239, 13.4 in A new miniature of Xenurobryconini (Characiformes: Characidae) from the rio Tapajós basin, Brazil

Fig. 5. Xenurobrycon varii, MPEG 25239, 13.4 mm SL, left side of maxilla and premaxilla and right side (inverted) of dentary, Scale bars = 0.2 mm.

Fig. 2. Xenurobrycon varii, MPEG 26592, 12.5 in A new miniature of Xenurobryconini (Characiformes: Characidae) from the rio Tapajós basin, Brazil

Fig. 2. Xenurobrycon varii, MPEG 26592, 12.5 mm SL, right side (inverted) of infraorbital (io) series. Antorbital not depicted. Scale bar = 500 µm.

FIGURE 1 in Science and hobby joining forces for the discovery of three new Corydoras (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with comments on Corydoras sp. CW111

FIGURE 1 | Corydoras thanatos, holotype, MNRJ 53287, 33.2 mm SL, Novo Progresso Municipality, Pará State, Brazil, stream with unknown name tributary to the rio Jamanxim, rio Tapajós basin.

FIGURE 14 in Science and hobby joining forces for the discovery of three new Corydoras (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with comments on Corydoras sp. CW111

FIGURE 14 | Uncatalogued aquarium specimen of Corydoras psamathos photographed alive. Photo by Takayuki Shimizu.

FIGURE 5 in Science and hobby joining forces for the discovery of three new Corydoras (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with comments on Corydoras sp. CW111

FIGURE 5 | Map of the rio Tapajós and adjoining areas, showing the geographical distribution of Corydoras thanatos (black circle), C. hypnos (white star), and C. psamathos (red squares). Each symbol may represent more than one locality.

FIGURE 9 in Science and hobby joining forces for the discovery of three new Corydoras (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with comments on Corydoras sp. CW111

FIGURE 9 | Paratypes of Corydoras hypnos photographed alive, showing general color pattern and morphology in lateral view in (A) INPA 59775, 26.2 mm SL, (B) INPA 59775, 27.2 mm SL, (C) INPA 59775, 22.2 mm SL, (D) INPA 59774, 28.2 mm SL, and (E) INPA 59774, 22.6 mm SL, all from the rio Jamanxim, rio Tapajós basin, Pará State, Brazil.

FIGURE 13 in Science and hobby joining forces for the discovery of three new Corydoras (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with comments on Corydoras sp. CW111

FIGURE 13 | Paratypes of Corydoras psamathos photographed alive, showing general color pattern and morphology in lateral view in (A) INPA 59772, 23.7 mm SL, (B) INPA 59773, 30.2 mm SL, and (C) INPA 59773, 29.3 mm SL. Specimen (A) is from the rio Jamanxim, and specimens (B–C) are from the igarapé Santa Júlia, rio Tapajós basin.

FIGURE 4 in Science and hobby joining forces for the discovery of three new Corydoras (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with comments on Corydoras sp. CW111

FIGURE 4 | Uncatalogued aquarium specimens of Corydoras thanatos photographed alive, showing general color pattern and morphology of (A) a female specimen, and (B) a dimorphic male specimen. Photos by Hans Evers.

FIGURE 15 in Science and hobby joining forces for the discovery of three new Corydoras (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with comments on Corydoras sp. CW111

FIGURE 15 | Type locality of Corydoras psamathos, the igarapé Santa Júlia, a tributary to the rio Jamanxim, rio Tapajós basin in Pará State, Brazil.