What is "pseudis"

Pseudis is a genus of frogs (swimming frogs) in the Hylidae family, and are found in the Guianas, Colombia, Venezuela, Trinidad, Brazil, Paraguay, southeastern Peru, eastern Bolivia, northeastern Argentina, and Uruguay.

Pseudis species are distributed throughout tropical and subtropical South America, almost entirely east of the Andes (P. paradoxa is the only species with population west of the Andes). They are commonly found in ponds associated with river floodplains, from Trinidad to northern Argentina, being absent only in Ecuador and Chile, highland regions, and the southernmost part of South America. Most species occur in Brazil, and P. fusca, P. tocantins, P. cardosoi, and P. bolbodactyla are endemic to this country.