First record of the genus Atlantistylis Reyss, 1975 (Crustacea: Cumacea) from the North Atlantic, with the description of a new species

A new species of the genus Atlantistylis Reyss, 1975 (Diastylidae) is described from the Atlantic Frontier Margin (North-East Atlantic). This is the first record of the genus Atlantistylis from the North Atlantic. The new species Atlantistylis borealis can be recognized by the presence of spines on the frontal and lateral lobes of the carapace combined with their absence on the pereon and pleon; the first pereopods are very long. The small telson with two small apical acuminate setae and the absence of pleopods in the male are characteristic of the genus.