The genus Jaton (Muricidae, Ocenebrinae), with the description of a new species from Angola, West Africa

The ocenebrine muricid genus Jaton Pusch, 1837, comprises a distinctive group of Late Oligocene to Recent species from the eastern warm-temperate Atlantic. The three living species, all from West Africa, are J. decussatus (Gmelin, 1791) from Mauritania and Senegal (type of the genus), J. flavidus (Jousseaume, 1874) from Senegal, and J. sinespina n. sp. from Angola. Of the fossil and living species, J. decussatus is the only one with a labral spine, which is formed at the edge of the outer lip as an extension of a spiral cord.