-51.956112, -3.4222224: 10 Treatments

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Spectracanthicus zuanoni   new species  Chamon, Carine C. & Rapp Py-Daniel, Lúcia H., 2014, Taxonomic revision of Spectracanthicus Nijssen & Isbrücker (Loricariidae: Hypostominae: Ancistrini), with description of three new species, Neotropical Ichthyology 12 (1), pp. 1-25: 19-22 19-22
Baryancistrus xanthellus   new species  Py-Daniel, Lúcia Rapp, Zuanon, Jansen & Oliveira, Renildo Ribeiro de, 2011, Two new ornamental loricariid catfishes of Baryancistrus from rio Xingu drainage (Siluriformes: Hypostominae), Neotropical Ichthyology 9 (2), pp. 241-252: 242-247 242-247
Anostomoides passionis   new species  Santos, Geraldo Mendes Dos & Zuanon, Jansen, 2006, Anostomoides passionis, a new fish species from rio Xingu, Brasil (Characiformes: Anostomidae), Zootaxa 1168 (1), pp. 59-68: 60-66 60-66
Anostomoides nattereri     Assega, Fernando Massayuki & Birindelli, José Luís Olivan, 2019, Taxonomic revision of the genus Anostomoides (Characiformes: Anostomidae), Zootaxa 4646 (1), pp. 124-144: 136-139 136-139
Parancistrus nudiventris   new species  Rapp Py-Daniel, Lúcia H. & Zuanon, Jansen, 2005, Description of a new species of Parancistrus (Siluriformes: Loricariidae) from the rio Xingu, Brazil, Neotropical Ichthyology 3 (4), pp. 571-577: 573-576 573-576
Uchuca amacayaca     Tavares, Gustavo Costa, Sovano, Rafael Segtowick Da Silva & Gutjahr, Ana Lúcia Nunes, 2016, Clarification of the katydid genus Uchuca Giglio-tos, 1898 (Orthoptera: Tettigoniidae): A new species in the Brazilian Amazon Rainforest, Zootaxa 4139 (4), pp. 542-550: 549 549
Hymenoptera   sp. nov.  Santos, Alvaro Doria Dos, Onody, Helena Carolina & Brandão, Carlos Roberto Ferreira, 2019, Taxonomic contributions to the genus Charops Holmgren, 1859 (Hymenoptera: Ichneumonidae), with description of seven new species from Brazil, Zootaxa 4619 (1), pp. 45-76: 49-52 49-52
Tetragonopterus argenteus     Silva, Gabriel S. C., Melo, Bruno F., Oliveira, Claudio & Benine, Ricardo C., 2016, Revision of the South American genus Tetragonopterus Cuvier, 1816 (Teleostei: Characidae) with description of four new species, Zootaxa 4200 (1), pp. 1-46: 11-14 11-14
Tetragonopterus chalceus     Silva, Gabriel S. C., Melo, Bruno F., Oliveira, Claudio & Benine, Ricardo C., 2016, Revision of the South American genus Tetragonopterus Cuvier, 1816 (Teleostei: Characidae) with description of four new species, Zootaxa 4200 (1), pp. 1-46: 15-18 15-18
Pyrrhulina capim   new species  Vieira, Lorena S. & Netto-Ferreira, André L., 2019, New species of Pyrrhulina (Teleostei: Characiformes: Lebiasinidae) from the eastern Amazon, Pará, Brazil, Neotropical Ichthyology 17 (2), pp. 1-8: 2-7 2-7