Type specimens of Elasmobranchii in the Museu de Zoologia da Universidade de São Paulo (MZUSP) Author Lima, Arthur De Museu de Zoologia da Universidade de São Paulo, Av. Nazaré 481, São Paulo, SP 04263 - 000, Brazil. Author Loboda, Thiago Silva Departamento Acadêmico de Ensino (DAENS), Universidade Tecnológica Federal do Paraná, Avenida Monteiro Lobato, s / n Jardim Carvalho, Ponta Grossa, PR 84016 - 210, Brazil. Author Gianeti, Michel Donato Museu de Zoologia da Universidade de São Paulo, Av. Nazaré 481, São Paulo, SP 04263 - 000, Brazil. Author Silva, João Paulo Capretz Batista Da Departamento de Sistemática e Ecologia, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, Castelo Branco, João Pessoa, PB 58051 - 900, Brazil. Author Pinna, Mario De Museu de Zoologia da Universidade de São Paulo, Av. Nazaré 481, São Paulo, SP 04263 - 000, Brazil. text Zootaxa 2023 2023-05-29 5296 3 301 332 http://dx.doi.org/10.11646/zootaxa.5296.3.1 journal article 10.11646/zootaxa.5296.3.1 1175-5326 7983829 4B889879-03B7-4373-A5AF-D3B807AAEF72 Potamotrygon tatianae Silva & Carvalho, 2011 Holotype : MZUSP 107673 ; adult male , 343 mm DW (approximately the same DW as cited in Silva & Carvalho, 2011 ) ( Fig. 17 ); Rio Madre de Díos , municipal district of Boca Manu , upper Amazon basin, Madre de Dios State , Peru , 12°40’S , 71°04’06”W ; depth not listed; F. B. Reyda ; 15 Jan 2002 . Notes: Field no. PU-23. FIGURE 17. Holotype of Potamotrygon tatianae (MZUSP 107673, male, 343 mm DW) in dorsal (left) and ventral (right) views. Paratypes : MZUSP 107667 : PU-07; one adult male, 362 mm DW; Rio Madre de Díos , municipal district of Boca Manu , upper Amazon basin, Madre de Dios State , Peru , 12°40’S , 71°04’06”W ; depth not listed; F. B. Reyda ; 27 May 2001 . Notes: Specimen donated to MUSM . DW provided here cited on Silva & Carvalho, 2011 . MZUSP 107668: PU-13; one preadult female, 262 mm DW (approximately the same DW as cited in Silva & Carvalho, 2011); Rio Madre de Díos , municipal district of Boca Manu, upper Amazon basin, Madre de Dios State , Peru , 12°40’S , 71°04’06”W ; depth not listed; F. B. Reyda ; 30 May 2001 . Notes: Digestive tract removed.