Table 1.

Identification, voucher number and locality of the specimens used for the isolation of the Rex1 fragments

Species	Specimen voucher	Locality
Physalaemus albifrons (P. cuvieri group)	ZUEC 12361	Vassouras, Barreirinhas-MA, Brazil
Physalaemus albonotatus (P. cuvieri group)	ZUEC 16419	Lambari do Oeste-MT, Brazil
Physalaemus ephippifer (P. cuvieri group)	ZUEC 13705	Belém-PA, Brazil
Physalaemus aff. cuvieri (P. cuvieri group)	ZUEC 18191	Alenquer-PA, Brazil
Physalaemus henselii (P. henselii group)	MHNM 9512	Ruta 5, km 492, Pueblo Madera, Rivera, Uruguay
Physalaemus spiniger (P. signifer Clade)	ZUEC 14516	Reserva Salto Morato-Curitiba-PR, Brazil

ZUEC: Museu de Zoologia “Prof. Adão José Cardoso”, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo, Brasil. MNHN: Museo Nacional de Historia Natural de Montevideo. Uruguay. PA: State of Pará; MT: State of Mato Grosso; MA: State of Maranhão; PR: State of Paraná