Polychaeta Orbiniidae from Antarctica, the Southern Ocean, the Abyssal Pacific Ocean, and off South America Author Blake, James A. text Zootaxa 2017 4218 1 1 145 journal article 37318 10.5281/zenodo.245827 69cf893c-7b35-48e8-ad78-d9775626f287 1175-5326 245827 9345C596-8656-4B5C-AD8C-2FACF4E9240C “ Orbiniella ” branchiata ( Hartman, 1967 ) Orbiniella branchiata Hartman, 1967 : 165 –166, pl. 33; Rozbaczylo 1985 :130 . Material examined. Drake Passage, Eltanin Sta. 9-740, 18 Sep 1963 , 56.10°S, 66.32°W, 384–494 m , holotype (USNM 55533). Description. Holotype incomplete, small, 4 mm long, 0.8 mm wide for 22 setigerous segments. Prostomium much wider than long, tapering anteriorly, rounded on anterior margin, Eyespots absent. Peristomium with three narrow asetigerous rings; separation of thorax and abdomen gradual, indistinct, occurring from setiger 14; branchiae from setiger 4, long at first, broad basally, tapering apically, continuing to posterior segments; noto- and neuropodial postsetal lobes simple, fingerlike; subpodial lobes or fringe lacking; notosetae including crenulated capillaries and furcate setae; neurosetae including thoracic and abdominal capillaries and abdominal aciculae. Remarks. The holotype was well described by Hartman (1967) . As a species of Orbiniella , O. branchiata is unusual in the presence of three achaetous peristomial rings, which should serve to readily differentiate the species from other orbiniids. However, given the small size of the holotype , the presence of branchiae, elongate postsetal lobes, and furcate setae, the species most likely represents a juvenile of another species in another genus. Distribution. Drake Passage, 384– 494 m .