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 pantanensis Loboda & Carvalho, 2013 Holotype : MZUSP 110890 ; adult female , 318 mm DW (approximately the same DW as cited in Loboda & Carvalho, 2013 ) ( Fig. 15 ); Baia Sinhá Mariana , tributary of Rio Cuiabá , Barão de Melgaço , Mato Grosso State , Brazil ; depth not listed; W. J. da Graça ; 24 Apr 2000 . FIGURE 15. Holotype of Potamotrygon pantanensis (MZUSP 110890, female, 318 mm DW) in dorsal (left) and ventral (right) views. Notes: Digestive tract removed. Puboischiadic bar sectioned medially and right ventral disc border with mild skin damage (still attached to specimen). Paratypes : MZUSP 110874 ; one adult female, 302 mm DW (approximately the same DW as cited in Loboda & Carvalho, 2013 ); Rio Cuiabá , Rosário Oeste, Mato Grosso State , Brazil ; depth not listed; W. J. da Graça ; 24 Apr 2000 . Notes: Digestive tract removed. Lower jaw sectioned on lateral edges. Specimen dissected on the neurocranium region. MZUSP 110888 ; one adult female , 349 mm DW (cited as 336 mm DW in Loboda & Carvalho, 2013 ); Baia Sinhá Mariana, tributary of Rio Cuiabá , Bar ã o de Melgaço , Mato Grosso State , Brazil ; depth not listed; W. J. da Graça ; 24 Apr 2000 . Notes: Digestive tract removed. Puboischiadic bar sectioned medially. Tail broken. Skin patch removed for SEM. Caudal stinger removed. MZUSP 110889 ; one adult female , 326 mm DW (approximately the same DW as cited in Loboda & Carvalho, 2013 ); Baia Sinhá Mariana, tributary of Rio Cuiabá , Bar ã o de Melgaço , Mato Grosso State , Brazil ; depth not listed; W. J. da Graça ; Collection date: 24 Apr 2000 . Notes: Digestive tract removed. Caudal stinger removed. MZUSP 110891 ; one adult male , 270 mm DW (approximately the same DW as cited in Loboda & Carvalho, 2013 ); Baia Sinhá Mariana, tributary of Rio Cuiabá , Bar ã o de Melgaço , Mato Grosso State , Brazil ; depth not listed; W. J. da Graça ; 24 Apr 2000 . Notes: Tail removed. MZUSP 110892 ; one adult female , 298 mm DW (approximately the same DW as cited in Loboda & Carvalho, 2013 ); Baia Sinhá Mariana, tributary of Rio Cuiabá , Bar ã o de Melgaço , Mato Grosso State , Brazil ; depth not listed; W. J. da Graça ; 24 Apr 2000 . Notes: Digestive tract removed. Skin patch removed for SEM. Caudal sting removed. MZUSP 110894 ; one adult female , 317 mm DW; Baia Sinhá Mariana, tributary of Rio Cuiabá , Bar ã o de Melgaço , Mato Grosso State , Brazil ; depth not listed; W. J. da Graça ; 24 Apr 2000 . Notes: Specimen not located. MZUSP 110901 ; one adult female , 303 mm DW (approximately the same DW as cited in Loboda & Carvalho, 2013 ); Rio Cuiabá , Rosário Oeste, Mato Grosso State , Brazil ; depth not listed; W. J. da Graça ; 24 Apr 2000 . Notes: Digestive tract removed. Tip of tail damaged.