Potamotrygon rex Carvalho, 2016

Lima, Arthur De, Loboda, Thiago Silva, Gianeti, Michel Donato, Silva, João Paulo Capretz Batista Da & Pinna, Mario De, 2023, Type specimens of Elasmobranchii in the Museu de Zoologia da Universidade de São Paulo (MZUSP), Zootaxa 5296 (3), pp. 301-332 : 320-321

Potamotrygon rex Carvalho, 2016

Holotype: MZUSP 120371 ; adult female, 636 mm DW (cited as 690 mm DW in Carvalho, 2016b) ( Fig. 16 ); Rio Tocantins near the mouth of the right bank tributary Rio Manoel Alves , Tocantins State, Brazil, 11°18'55"S, 48°27'28"W; depth not listed; NEAMB team; 10 Jul 2003.

Notes: Formerly UNT 7139.

Paratypes: MZUSP 120354 ; adult female, 341 mm DW (approximately the same DW as cited in Carvalho, 2016b); Rio Tocantins, next to Rio Santa Tereza , Tocantins State, Brazil, 11˚47’27”S, 48˚37’2”W; depth not listed; NEAMB team 08 Sep 2003;

Notes: Digestive tract removed. Formerly UNT 2198 .

MZUSP 120355 ; adult male, 352 mm DW (cited as 380 mm DW in Carvalho, 2016b); Rio Tocantins, at Rio Manoel Alves , Tocantins State, Brazil, 11˚18’55”S, 48˚27’28”W; depth not listed; NEAMB team; 13 Jun 2003;

Notes: Digestive tract removed. Formerly UNT 2199 .

MZUSP 120356 ; adult male, 363 mm DW (cited as 378 mm DW in Carvalho, 2016b); Rio Areias at confluence with Rio Tocantins, Tocantins State, Brazil, 10°52'05''S, 48°21'39"W; depth not listed; NEAMB team; 08 Jun 2003.

Notes: Digestive tract removed. Branchial openings medially sectioned, but not dissected. Formerly UNT 2200 .

MZUSP 120358 ; adult male, 432 mm DW; Rio Areias at confluence with Rio Tocantins, Tocantins State, Brazil, 10°52'05''S, 48°21'39"W; depth not listed; NEAMB team; 12 Sep 2002 .

Notes: Digestive tract removed. DW not included in Carvalho (2016b). Formerly UNT 7097.

MZUSP 120360 ; adult male 392 mm DW; Rio Maranhão at Traçadal farm, Tocantins State, Brazil, 12˚31’21”S, 48˚13’41”W; depth not listed; NEAMB team; 03 Mar 2000 .

Notes: DW not provided in Carvalho (2016b). Formerly UNT 7116

MZUSP 120362 ; adult male, 422 mm DW; Rio Paranã at Traçadal Farm, Tocantins State, Brazil, 12˚30’35”S, 48˚12’57”W; depth not listed; NEAMB team; 09 Aug 2000 .

Notes: Digestive tract removed. DW not included in Carvalho (2016b). Formerly UNT 7117.

MZUSP 120363 ; adult male, 391 mm DW; Rio Tocantins at confluence with Rio Santa Tereza, Tocantins state, Brazil, 11°47'26"S, 48°27'28"W; depth not listed; NEAMB team; 14 Oct 2003 .

Notes: Digestive tract removed. DW not included in Carvalho, 2016b. Formerly UNT 7118.

MZUSP 120364 ; adult male, 449 mm DW; Rio Tocantins , Rio Manoel Alves, Tocantins State, Brazil, 11˚18’55”S, 48˚27’28”W; depth: not listed; NEAMB team; 20 Dec 2001 .

Notes: Digestive tract removed. DW not included in Carvalho (2016b). Formerly UNT 7123.

MZUSP 120365 ; one adult male; 421 mm DW; Rio Tocantins , at confluence with Rio Santa Tereza, Tocantins State, Brazil, 11°47'26"S, 48°37'01"W; depth not listed; NEAMB team; 20 Dec 2001 .

Notes: Digestive tract removed. Puboischiadic medially bar sectioned. DW not included in Carvalho (2016b). UNT 7125.

MZUSP 120366 ; one adult male, 413 mm DW; Rio Tocantins at Traçadal farm, Tocantins state, Brazil, 12˚28’1”S, 48˚14’47”W; depth not listed; NEAMB team; 25 Aug 1998 .

Notes: Digestive tract removed. Round bite scar on posteromedian margin of disc. DW not included in original description. Formerly UNT 7128.

MZUSP 120367 ; one adult female, 649 mm DW; Rio Maranhão at Traçadal farm, Tocantins State, Brazil, 12˚31’21”S, 48˚13’41”W; depth not listed; NEAMB team; 27 May 1998 .

Notes: DW not included in original description. Formerly UNT 7131.

MZUSP 120368 ; one adult female, 472 mm DW; Rio Paranã at Traçadal Farm, Tocantins State, Brazil, 12˚30’35”S, 48˚12’57”W; depth not listed; NEAMB team; 03 Jun 2000 .

Notes: Digestive tract removed. DW not included in original description. Formerly UNT 7133.

MZUSP 120369 ; one adult male, 354 mm DW (approximately the same DW as cited in Carvalho, 2016b); Rio Crixás , Brejinho de Nazaré, Tocantins State, Brazil, 11°08'15"S, 48°45'06"W; depth not listed; NEAMB team; 22 Jul 2000 .

Notes: Digestive tract removed. Formerly UNT 7136.

MZUSP 120370 ; one adult female, 636 mm DW; Rio São Valério at confluence with Rio Tocantins, Tocantins State, Brazil, 11˚21’51”S, 48˚28’16”W; depth: not listed; NEAMB team; 06 Oct 2003 .

Notes: Right disc margins damaged. Digestive tract removed and puboischiadic bar medially sectioned. DW not included in Carvalho (2016b). Formerly UNT 7138.

MZUSP 120372 ; one adult female, 618 mm DW (approximately the same DW as cited in Carvalho, 2016b); Rio Tocantins , at Rio Manoel Alves, Tocantins State, Brazil, 11˚18’55”S, 48˚27’28”W; depth not listed; NEAMB team; 08 Aug 2002 .

Notes: Skin patch on midportion head removed for SEM. Digestive tract removed. Right gill openings damaged. Right mouth corner damaged. Formerly UNT 7142.

MZUSP 120373 ; one adult male, 479 mm DW (approximately the same DW as cited in Carvalho, 2016b); Rio Tocantins , at Rio Manoel Alves, Tocantins State, Brazil, 11˚18’55”S, 48˚27’28”W); depth not listed; NEAMB team; 14 Sep 2001 .

Notes: Digestive tract removed. Puboischiadic bar sectioned. Formerly UNT 7147.

Figures

FIGURE 16. Holotype of Potamotrygon rex (MZUSP 120371, female, 636 mm DW) in dorsal (left) and ventral (right) views.