Twenty-two species of amphipods distributed in 12 families are recorded from samples of the sponge Dysidea fragilis Johnston from Arraial do Cabo, Rio de Janeiro, Brazil. One new species in the genus Autonoe is described with new records for Gammaropsis palmata
and Perioculodes cf. aequimanus from the Brazilian coast. A diagnosis and distribution of each species is provided and a few remarks are given.
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