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FIGURE 8 in Review of the armoured catfish genus Hypostomus (Siluriformes: Loricariidae) from the Parnaíba River basin, Northeastern Brazil, with description of a new species

FIGURE 8 | Hypostomus johnii, UFPB 9268, 107.7 mm SL. Poti River, tributary of the Parnaíba River basin, Crateús, Ceará, Brazil.

FIGURE 3 in Review of the armoured catfish genus Hypostomus (Siluriformes: Loricariidae) from the Parnaíba River basin, Northeastern Brazil, with description of a new species

FIGURE 3 | Hypostomus velhomonge, UFPB 9565, holotype, 118.0 mm SL, rio Balsas, tributary of Parnaíba River, Maranhão State, Brazil.

FIGURE 6 in Review of the armoured catfish genus Hypostomus (Siluriformes: Loricariidae) from the Parnaíba River basin, Northeastern Brazil, with description of a new species

FIGURE 6 | Geographic distribution of Hypostomus velhomonge in the Parnaíba River basin, Northeast Brazil.

FIGURE 2 in Review of the armoured catfish genus Hypostomus (Siluriformes: Loricariidae) from the Parnaíba River basin, Northeastern Brazil, with description of a new species

FIGURE 2 | Phylogenetic tree with Bayesian inference for the mitochondrial cox1 gene, including species of Hypostomus that occur in the Parnaíba River (in bold), and other comparative species of the surrounding ecoregions: (H. pusarum and H. sertanejo from the Mid-Northeastern Caatinga) and H. velhochico from São Francisco ecoregion. The numbers above the branches are later probability values. H: Holocene.

FIGURE 1 in Review of the armoured catfish genus Hypostomus (Siluriformes: Loricariidae) from the Parnaíba River basin, Northeastern Brazil, with description of a new species

FIGURE 1 | Canonical Variable Analysis (CVA) with morphological data of Hypostomus species from the Parnaíba River basin.

FIGURE 34 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 34 | Rhinotocinclus hardmani, holotype, CSBD F3618, 22.7 mm SL, female, Kuribrong River at Grass Shoals Rapids, Potaro-Siparuni, Guyana.

FIGURE 32 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 32 | Geographical distribution of Rhinotocinclus species of the R. collinsae group in southeastern Guiana Shield. Rhinotocinclus collinsae (yellow dots); R. halbothi (red dots); R. hardmani (blue dots). T = Type-locality

FIGURE 31 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 31 | Rhinotocinclus collinsae, holotype, AMNH 55433, 23.9 mm SL, female, creek tributary to Little Takutu River, Cuyuni-Mazaruni, Guyana.

FIGURE 29 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 29 | Rhinotocinclus isabelae, holotype, MUSM 69737, 17.6 mm SL, female, Río Nanay, between Puerto Almendra and Tarapoto, Iquitos, Loreto, Peru.

FIGURE 28 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 28 | Live specimen of Rhinotocinclus pilosus from lot MCP 35878, rio Maicimirim, ca. 45 km E of rio Madeira on Transamazon road, Humaitá, Amazonas, Brazil.

FIGURE 33 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 33 | Rhinotocinclus halbothi, holotype, MCP 48029, 19.4 mm SL, female, creek tributary to igarapé do Moura at Platô Monte Branco, rio Trombetas drainage, Oriximiná, Pará, Brazil.

FIGURE 27 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 27 | Rhinotocinclus pilosus, holotype, UFRO 27700, 22.6 mm SL, female, igarapé Traíra, ca. 35 km E of rio Madeira on Transamazon road, Humaitá, Amazonas, Brazil.

FIGURE 26 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 26 | Rhinotocinclus discolor, holotype, MHNLS 26183, 24.4 mm SL, male, Caño Pasa, tributary of Río Sipapo, 98 km from Puerto Ayacucho airport, Amazonas, Venezuela.

FIGURE 25 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 25 | Rhinotocinclus kwarup, holotype, MZUSP 125830, 21.6 mm SL, female, rio Couto de Magalhães near Vila São José do Couto, Campinápolis, Mato Grosso, Brazil.

FIGURE 24 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 24 | Rhinotocinclus yaka, holotype, MZUSP 123655, 29.4 mm SL, female, igarapé Açaí near São Pedro Village, rio Tiquié basin, Amazonas, Brazil.

FIGURE 22 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 22 | Rhinotocinclus variola, paratype, MCP 48245, 24.3 mm SL, male, Quebrada Tacana, tributary to Río Amazonas at km 6.5 of road from Leticia to Tarapacá, Leticia, Departamento Amazonas, Colombia.

FIGURE 23 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 23 | Rhinotocinclus variola, MPEG 12341, 20.2 mm SL, female, rio Coari, Coari, Amazonas, Brazil.

FIGURE 21 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 21 | Live specimen of Rhinotocinclus eppleyi from lot ROM 88301, Caño Parhueña, Puerto Ayacucho, upstream of Route 12 bridge, ca. 35 km NE of Puerto Ayacucho, Amazonas, Venezuela. Photo by Nathan Lujan.

FIGURE 20 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 20 | Rhinotocinclus eppley, MCP 54750, 21.7 mm SL, female, Caño Parhueña, Puerto Ayacucho, upstream of Route 12 bridge, ca. 35 km NE of Puerto Ayacucho, Amazonas, Venezuela.

FIGURE 19 in A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species

FIGURE 19 | Rhinotocinclus polyochrus, holotype, AMNH 74482, 27.6 mm SL, female, creek tributary to Río Mawarinuma at Neblina base camp, Amazonas, Venezuela.