New species and records of deep-water Orbiniidae (Annelida, Polychaeta) from the Eastern Pacific continental slope, abyssal Pacific Ocean, and the South China Sea Author Blake, James A. text Zootaxa 2020 2020-02-03 4730 1 1 61 journal article 24204 10.11646/zootaxa.4730.1.1 bcc0e0fc-b6a5-4d5a-8008-7b714c106a7c 1175-5326 3634270 7F4CD129-9FF9-4593-A8A4-DB999B3E402F Genus Berkeleyia Hartman, 1971 . Emended Blake 2017 Type-species: Berkeleyia profunda Hartman, 1971 , Mozambique Basin, 4886–5069 m . Diagnosis. (Emended) Prostomium pointed, conical; peristomium with one or two achaetous rings. Branchiae from posterior thoracic or abdominal segments. Thoracic noto- and neuropodia with one postsetal lobe, sometimes absent or inconspicuous on anteriormost setigers; subpodial lobes absent; abdominal setigers with simple noto- and neuropodia; neuropodia with or without ventral cirrus; interramal cirri absent. Thoracic noto- and neurosetae all capillaries. Abdominal notosetae include capillaries; pointed spines present or absent; furcate setae present or absent; neuropodia with capillaries and protruding acicular spines; or only spines. Remarks . The genus Berkeleyia is similar to Leitoscoloplos in lacking spines or uncini in thoracic neuropodia. Species of Berkeleyia , however, have elongate neuropodial spines in abdominal setigers and sometimes abdominal notopodial spines. Until recently, Berkeleyia was known for a single deep-water species, B. profunda Hartman, 1971 , from the Indian Ocean. Blake (2017) described four additional species from off South America and Antarctica , three of which were from deep water, with B. hadala Blake, 2017 from the Peru-Chile trench in 6143 m representing the deepest known occurrence for an orbiniid polychaete. Another deep-water species has been discovered at the Juan de Fuca Ridge associated with hydrothermal vents and is described here.