(Sphaenorhynchus surdus)
Sphaenorhynchus surdus, or Cochran's lime treefrog, is a species of frog in the family Hylidae. It is endemic to southern Brazil and is known from the eastern Paraná, Santa Catarina, and northeastern Rio Grande do Sul states. Before Sphaenorhynchus caramaschii was described in 2007, all Sphaenorhynchus from the south of the state of São Paulo state all way south to Rio Grande do Sul were identified as S. surdus.