An identification key was produced for caprellid species recorded from the coast of Paraná and Santa Catarina states, Southern Brazil. Analyzed specimens are part of scientific collections or were obtained from nature, within these states. Nine caprellid belonging to the family Caprellidae, from which eight of Caprellinae - Caprella danilevskii, Caprella dilatata, Caprella equilibra, Caprella penantis, Caprella scaura, Mayerella sp., Paracaprella pusilla e Pseudaeginella montoucheti - and one Phtisicinae - Phtisica marina - were treated in the present study.
identification key; Caprellidae; Caprellinae; Phtisicinae; southern of Brazil
