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FIG. 2 in The Fishes Of The Amazon: Distribution And Biogeographical Patterns, With A Comprehensive List Of Species

FIG. 2. Richest lineages of Amazonian fishes in number of species: A, All orders; B, families; C, genera.

FIG. 19. Brazilian Shield. A. Yellow area delimits the distribution pattern. B in The Fishes Of The Amazon: Distribution And Biogeographical Patterns, With A Comprehensive List Of Species

FIG. 19. Brazilian Shield. A. Yellow area delimits the distribution pattern. B. Caiapobrycon spp. (records from MZUSP). C. Jupiaba apenima (records from MZUSP). D. Moenkhausia gr. pankilopteryx/pirauba (records from MZUSP).

FIG. 9. Amazon-only Lowland. A. Yellow area delimits the distribution pattern. B in The Fishes Of The Amazon: Distribution And Biogeographical Patterns, With A Comprehensive List Of Species

FIG. 9. Amazon-only Lowland. A. Yellow area delimits the distribution pattern. B. Adontosternarchus balaenops (data from Mago-Leccia et al., 1985). C. Cetopsis candiru (data from Vari et al., 2005). D. Curimatella meyeri (data from Vari, 1992a).

FIG. 21. Cis-Andean foothills. A. Yellow area delimits the distribution pattern. B in The Fishes Of The Amazon: Distribution And Biogeographical Patterns, With A Comprehensive List Of Species

FIG. 21. Cis-Andean foothills. A. Yellow area delimits the distribution pattern. B. Astyanacinus spp. (data from Dagosta, 2011). C. Leporinus striatus (data from Birindelli and Britski, 2013). D. Steindachnerina dobula (data from Vari, 1991).

FIG. 7. Amazon and Orinoco Lowlands. A. Yellow area delimits the distribution pattern. B in The Fishes Of The Amazon: Distribution And Biogeographical Patterns, With A Comprehensive List Of Species

FIG. 7. Amazon and Orinoco Lowlands. A. Yellow area delimits the distribution pattern. B. Moenkhausia lepidura (data from Marinho and Langeani, 2016). C. Potamorhina altamazonica (data from Vari, 1984). D. Vandellia cirrhosa (M.P., unpublished data).

FIG. 13. Guiana Mangrove Province. A. Yellow area delimits the distribution pattern. B in The Fishes Of The Amazon: Distribution And Biogeographical Patterns, With A Comprehensive List Of Species

FIG. 13. Guiana Mangrove Province. A. Yellow area delimits the distribution pattern. B. Curimata cyprinoides (data from Vari, 1989a). C. Cyphocharax helleri (data from Vari, 1992b) with additional records from MZUSP). D. Polycentrus schomburgkii (see data from Coutinho and Wosiacki, 2014).

FIG. 18. Longitudinal correspondence among Amazonian Shield versants. A in The Fishes Of The Amazon: Distribution And Biogeographical Patterns, With A Comprehensive List Of Species

FIG. 18. Longitudinal correspondence among Amazonian Shield versants. A. Red area delimits the distribution pattern of western basins (Trombetas and Tapajós); yellow area the western basins pattern (Jari, Xingu, and Tocantins). B. Sartor gr. elongatus (records from MZUSP). C. Bryconexodon spp. (records from MZUSP). D. Bivibranchia velox (records from MZUSP).

FIG. 6. Amazon Core. A. Yellow area delimits the distribution pattern. B in The Fishes Of The Amazon: Distribution And Biogeographical Patterns, With A Comprehensive List Of Species

FIG. 6. Amazon Core. A. Yellow area delimits the distribution pattern. B. Boullengerella spp. (data from Vari (1995) with additional records from MZUSP). C. Moenkhausia collettii (records from MZUSP). D. Moenkhausia oligolepis (records from MZUSP).

FIG. 17 in The Fishes Of The Amazon: Distribution And Biogeographical Patterns, With A Comprehensive List Of Species

FIG. 17. Guiana Shield (Atlantic and Amazonian versants). A. Yellow area delimits the distribution pattern. B. Pseudancistrus brevispinis (data fom Cardoso and Montoya-Burgos, 2009).

FIG. 14. Eastern Amazon. A in The Fishes Of The Amazon: Distribution And Biogeographical Patterns, With A Comprehensive List Of Species

FIG. 14. Eastern Amazon. A. Yellow area delimits the distribution pattern (wavy line represents position of Purus Arch). B. Aphanothorolus emarginatus (data from Ray and Armbruster, 2016). C. Pachyurus junki (records from MZUSP). D. Synaptolaemus latofasciatus (data from Britski et al., 2011).

Fig. 3 in Description of a new species of Tetranematichthys (Siluriformes: Auchenipteridae) from the lower Amazon basin, Brazil

Fig. 3. Mandibular barbel of Tetranematichthys barthemi, MPEG 14565, 175.7mm SL, showing the fleshy serrated distal portion. Scale bar = 1mm.

Fig. 5 in Description of a new species of Tetranematichthys (Siluriformes: Auchenipteridae) from the lower Amazon basin, Brazil

Fig. 5. Ventral view of head and anterior portion of (a) Tetranematichthys barthemi, holotype, male, MPEG 11081, 154.2 mm SL; and (b) Tetranematichthys quadrifilis, MPEG 6535, 127.2 mm SL, showing the difference between the alignments of the postorbital portion of head.

Fig. 1 in Description of a new species of Tetranematichthys (Siluriformes: Auchenipteridae) from the lower Amazon basin, Brazil

Fig. 1. Tetranematichthys barthemi, holotype, male, MPEG 11081, 154.2 mm SL. (a) lateral, (b) dorsal, and (c) ventral views.

Fig. 2 in Morphology of lateral line canals in Neotropical freshwater stingrays (Chondrichthyes: Potamotrygonidae) from Negro River, Brazilian Amazon

Fig. 2. Lateral line canals on the dorsal (D) and ventral (V) surfaces, divided in three sections to quantify neuromasts in Potamotrygon motoro and P. orbignyi. A) anterior; C) central, and P) posterior. HYO) hyomandibular canal; IO) infraorbital canal; MAN) mandibular canal; NS) nasal canal; PLL) posterior lateral line canal; SO) supraorbital canal.

Fig. 3 in Morphology of lateral line canals in Neotropical freshwater stingrays (Chondrichthyes: Potamotrygonidae) from Negro River, Brazilian Amazon

Fig. 3. Distribution of the lateral line canals in Potamotrygon motoro (a), P. orbignyi (b), Potamotrygon sp. "cururu" (c), and Paratrygon aiereba (d) and their connections between the dorsal (D) and ventral (V) surfaces. BS) branchial slits; E) eye; HYO) hyomandibular canal; IO) infraorbital canal; M) mouth; MAN) mandibular canal; NS) nasal canal; PLL) posterior lateral line canal; S) spiracle; SL) scapular loop; SO) supraorbital canal; VS) vesicles of Savi; square) connection of the hyomandibular canal; triangle) connection of the infraorbital canal. Potamotrygon motoro: DW = 18.5 cm; P. orbignyi: DW = 26.7 cm; Potamotrygon sp. "cururu": DW = 18.7 cm; and Paratrygon aiereba: DW = 18.9 cm. DW = disc width.

Fig. 1 in Morphology of lateral line canals in Neotropical freshwater stingrays (Chondrichthyes: Potamotrygonidae) from Negro River, Brazilian Amazon

Fig. 1. Sampling sites of Potamotrygon motoro, P. orbignyi, Potamotrygon sp. "cururu" and Paratrygon aiereba, in the middle Negro River, Barcelos, Amazonas State, Brazil. 1) Arirahá River; 2) Cuiuni River; 3) Daraquá stream; 4) Demeni River; 5) Itu River; 6) Maqui Lake; 7) Zamula stream.

Fig. 4 in Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil

Fig. 4. Mean values of ∆RGS (a) and ∆K (b) and frequency of bi-monthly percentage of the maturational stages for the females (c) of Plagioscion magdalenae in the bay of Marajo.

Fig. 3 in Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil

Fig. 3. Photomicrographs of Plagioscion magdalenae ovarian tissue at various maturity stages. a) Immature, HE, 100x. b) Maturing, HE, 100x. c) Mature, HE, 40x. d) Spawned/spent, HE, 40x. I. chromatin nucleolus (stage I); II. perinucleolar stage (stage II); III. cortical alveoli oocytes (stage III); IV. full vitellogenic (stage IV); pf. postovulatory follicles; at. atretic follicles.

Fig. 4 in Ageneiosus uranophthalmus, a new species of auchenipterid catfish (Osteichthyes: Siluriformes) from river channels of the central Amazon basin, Brazil

Fig. 4. Drainage map of northern South America illustrating the geographic distribution of Ageneiosus uranophthalmus. Type locality represented by triangle. Some symbols represent more than one locality or lot of specimens. Base map by Marilyn Weitzman.

Fig. 1 in Ageneiosus uranophthalmus, a new species of auchenipterid catfish (Osteichthyes: Siluriformes) from river channels of the central Amazon basin, Brazil

Fig. 1. Ageneiosus uranophthalmus, holotype, INPA 8945, 92.1 mm SL, Brazil, Amazonas State, Itacoatiara, rio Amazonas below Paraná da Eva, in lateral (a), dorsal (b), and ventral (c) views.