Redescription of Caprella dilatata Krøyer, 1843 (Caprellidae: Amphipoda: Crustacea) from Brazil, with note on its biogeographical distribution in South America

Caprella dilatata Kroyer, 1843 (Caprellidae: Amphipoda: Crustacea) is redescribed based on specimens collected in mussel longlines from the Experimental Mussel Farming of Itajai Valley University (UNIVALI), Itapocoroi Bay, Santa Catarina State, Brazil. The distribution of C. dilatata was confirmed in Mar del Plata, Argentina, about 3,000 km from the previous records suggesting a wide distribution of the species along the Atlantic coast of South America.