Three new interstitial species of Remaneicaris Jakobi, 1972 (Copepoda: Harpacticoida: Parastenocarididae) from Southern and Southeastern Brazil

Three new species of the genus Remaneicaris from Southern and Southeastern Brazil are described. The new species are closely related to R. analuizae, R. euniceae, R. tageae and R. divae, sharing the presence of a hyaline margin on the 9th segment of male antennule. Remaneicaris itacambirucui sp.n., R. insolitus sp.n. and R. ivoneae sp.n. differ by: number of integumental windows on the 2nd and 5th urosomites; ornamentation of the telson, with postopercular ornamentation shared by R. insolitus sp.n. and R. itacambirucui sp.n.; shape of the swimming leg 3 exopod and armature of the swimming leg 3 endopod, with straight exopod and unarmed endopod shared by R. insolitus sp.n. and R. ivoneae sp. n.; and morphology of the swimming leg 4 endopod with a similar condition shared by R. insolitus sp.n. and R. itacambirucui sp.n. Remaneicaris itacambirucui sp.n. seems to be closely related to R. ivoneae sp.n. with which it shares the presence of a hyaline inner margin on the outer spine of males swimming leg 3. Remaneicaris insolitus sp.n. seems to be closely related to R. divae, sharing a continuous transversal row of spinules on the anteroventral margin of the telson. In the absence of more informative characters, the exact phylogenetic position of R. itacambirucui sp.n. and R. ivoneae sp.n. within a monophyletic group of species closely related to R. analuizae is difficult to determine.