Pteriacartia, A new genus of Acartiidae (Calanoida, Diaptomoidea) for Acartia josephinae Crisafi, 1974

Acartia josephinae is currently not ascribed to any of the existing Acartia subgenera. In the original description, morphological affinities with A. (Paracartia) latisetosa were suggested. No holotype or paratypes were deposited. The adult female has a fin-like, asymmetrical, prominence on the right side of the genital segment. Asymmetry of the genital segment is present in some representatives of the superfamily Diaptomoidea, but it is unique to the family Acartiidae. The adult male has a typical Acartia morphology. The distinctive morphological features of the species Acartia josephinae allow its inclusion in a new genus, Pteriacartia. Pteriacartia josephinae is here described. A neotype and paratypes have been deposited.