Antarcturus bovinus n. sp., a new Weddell-Sea Isopod of the family arcturidae (Isopoda: Valvifera)

Summary Antarcturus bovinus n. sp. (Isopoda, Valvifera) is described from the Antarctic Peninsula and the western and southern Weddell-Sea. This species can easily be recognized by the absence of large spines, the spine armature of the dorsal surface characteristic of other species is lacking. Only A. antarcticus Bouvier, 1910, A. coppingeri Miers, 1881, A. granulosus Nordenstam, 1933 and A. lillei Tattersall, 1921 are similar, but A. bovinus n. sp. can be discerned from these by the presence of blunt supraocular spines.Abbreviations used in text and figures A 1,2 antenna 1,2 - Hy hypopharynx - Md mandible - Md left mandible - Mx 1,2 maxilla 1,2 - Mxp maxilliped - P 1-7 pereopods 1-7 - Plp 1-5 pleopods 1-5 - rMd right mandible - Urp uropod