What is "euparkerella"

Euparkerella is a genus of craugastorid frogs. The common name coined for them is Guanabara frogs. They are endemic to Atlantic coastal forests in the southeastern Brazilian states Espírito Santo and Rio de Janeiro. The name Euparkerella honours H. W. Parker, a herpetologist who named the type species, with the Greek prefix eu meaning true and suffix ella, a diminutive form.