Notes on some type specimens of the Natural History Museum of Pirassununga São Paulo, Brazil Author Azevedo-Santos, Valter M. 0000-0001-8986-6406 Faculdade Eduvale de Avaré, Avaré, São Paulo, Brazil. & Programa de Pós-Graduação em Biodiversidade, Ecologia e Conservação, Universidade Federal do Tocantins, Porto Nacional, Tocantins, Brazil. & valter. ecologia @ gmail. com; https: // orcid. org / 0000 - 0001 - 8986 - 6406 valter.ecologia@gmail.com Author Katz, Axel M. 0000-0002-2933-7163 Laboratório de Sistemática e Evolução de Peixes Teleósteos, Departamento de Zoologia, Instituto de Biologia, Programa de Pós-Graduação em Biodiversidade e Biologia Evolutiva, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil. & axelmk @ gmail. com; https: // orcid. org / 0000 - 0002 - 2933 - 7163 axelmk@gmail.com Author Zawadzki, Cláudio H. 0000-0002-5642-4908 Universidade Estadual de Maringá. Departamento de Biologia. Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Maringá, Paraná, Brazil. & chzawadzki @ hotmail. com; https: // orcid. org / 0000 - 0002 - 5642 - 4908 chzawadzki@hotmail.com Author Deprá, Gabriel De Carvalho 0000-0002-5520-9763 Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Departamento de Biologia (DBI), Centro de Ciências Biológicas (CCB), Universidade Estadual de Maringá. Av. Colombo, Maringá, Paraná, Brazil. & gabrieldepra @ gmail. com; https: // orcid. org / 0000 - 0002 - 5520 - 9763 gabrieldepra@gmail.com text Zootaxa 2023 2023-05-12 5284 3 540 552 http://dx.doi.org/10.11646/zootaxa.5284.3.5 journal article 10.11646/zootaxa.5284.3.5 1175-5326 7929660 45127EF8-9509-4954-8B61-064780FC5D90 Plecostomus fluviatilis Schubart 1964a: 7 , figs. 1 and 4. Syntypes : EEBP 282 , 3 (1 measured), 160.0 mm SL ( Figure 4 ): Brazil , Minas Gerais , Ouro Fino , Mogi-Guaçu River at Espraiado waterfall, tributary of Grande River , tributary of the Paraná River , 24 Oct 1948 . Remarks. Currently, the species is valid as Hypostomus fluviatilis (Schubart 1964) (see Isbŗcker 1980). Three lots were employed by Schubart (1964a: 8) in the original description of Plecostomus fluviatilis , viz . EEBP 282 and 658 ( 2 specimens ) and MNRJ uncatalogued ( 1 specimen ). In the terms of Articles 72 and 73 of the Code (ICZN 1999), all those specimens constitute the type series and are syntypes , remaining as such until a lectotype is designated. The lot we found has the right catalog number (EEBP 282) and locality as provided by Schubart (1964a: 8) . This led us to recognize the individuals as part of the syntypes of P. fluviatilis .