A new species of cirolanid isopod has been collected on the inner Brazilian continental shelf, from sandy bottoms at depths of 15 m to 48 m. P. tricarinata n.sp. occurs sympatrically with P. eximia, the only other Politolana species recorded from the

Three new species of isopod crustaceans of the family Cirolanidae-Dolicholana ivanyae spec. nov., Natatolana hadassae spec. nov. and Politolana cleoniceae spec. nov.-are described from the shallow waters of the Brazilian bathyal. The specimens were

A taxonomic revision of Politolana based on an inferred phylogeny of the genus is presented. Included are revised descriptions and diagnoses of the genus and species, and a key to all the known species. Six of the 10 previously described species are redescribed: