Two new species of Benthana Budde-Lund, 1908 are described from material collected in the states of Rio de Janeiro and Paraná, Brazil. Benthana schmalfussi n. sp. is distinguished by the shape of the male pleopod 1 exopod, whereas Benthana guayanas n. sp. is distinguished by the noduli laterales d/c coordinates and shape of the male pleopod 1 exopod. A new method is given for defining the shape of the outer distal margin of the male pleopod 1 exopod.http://zoobank.org/urn:lsid:zoobank.org:pub:A79EDB3B-F7AC-47A3-ADD8-DA00FFAD69CB

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