Berkeleyia Hartman, 1971

Genus Berkeleyia Hartman, 1971 View in CoL . Emended by Blake 2017.

Type species. Berkeleyia profunda Hartman, 1971 View in CoL , Mozambique Basin , 4886–5069 m .

Diagnosis. (after Blake 2020) Prostomium pointed, conical; peristomium with one or two asetigerous 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 Day, 1977 in lacking spines or uncini in thoracic neuropodia. Species of Berkeleyia differ in having neuropodial spines in abdominal setigers and abdominal notopodial spines present or absent. Until recently, Berkeleyia was known for a single deep-water species, B. profunda Hartman, 1971 , from the Indian Ocean. Blake (2017) subsequently 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, B. lelievrei Blake, 2020 , was recently described from hydrothermal vents on the Juan de Fuca Ridge. Another deep-water species from the Condor Seamount off the Azores is described herein as new to science and is the first species of the genus to be reported in the North Atlantic Ocean. A comparison of the now seven known species of Berkeleyia is presented in Table 1.