Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Amphinomidae and Euphrosinidae (Annelida, Amphinomida) Author Neal, Lenka Life Sciences Department, Natural History Museum, London SW 7 5 BD, UK Author Wiklund, Helena https://orcid.org/0000-0002-8252-3504 Life Sciences Department, Natural History Museum, London SW 7 5 BD, UK & Department of Marine Sciences, University of Gothenburg, Box 463, 40530 Gothenburg, Sweden & Gothenburg Global Biodiversity Centre, Box 463, 40530 Gothenburg, Sweden Author Gunton, Laetitia M. Australian Museum Research Institute, 1 William Street, Sydney NSW 2010, Australia Author Rabone, Muriel https://orcid.org/0000-0002-8351-2313 Life Sciences Department, Natural History Museum, London SW 7 5 BD, UK Author Bribiesca-Contreras, Guadalupe https://orcid.org/0000-0001-8163-8724 Life Sciences Department, Natural History Museum, London SW 7 5 BD, UK Author Dahlgren, Thomas G. https://orcid.org/0000-0001-6854-2031 Department of Marine Sciences, University of Gothenburg, Box 463, 40530 Gothenburg, Sweden & Gothenburg Global Biodiversity Centre, Box 463, 40530 Gothenburg, Sweden & NORCE Norwegian Research Centre, Bergen, Norway Author Glover, Adrian G. https://orcid.org/0000-0002-9489-074X Life Sciences Department, Natural History Museum, London SW 7 5 BD, UK a.glover@nhm.ac.uk text ZooKeys 2022 2022-12-22 1137 33 74 http://dx.doi.org/10.3897/zookeys.1137.86150 journal article http://dx.doi.org/10.3897/zookeys.1137.86150 1313-2970-1137-33 9407DC6EB6B046AFA9C7F8DDCF542457 038180F7C47A5FCBBD907481025DF21B Euphrosinella Detinova, 1985 Type species. Euphrosine cirratoformis Averincev, 1972. Diagnosis (modified from Kudenov (1993) ). Prostomium with five appendages, including median antenna, two lateral antennae and two palps. Eyes present or absent. Caruncle free from the body wall for most of its length. Ringent chaetae absent. Remarks. Genus Euphrosinella was established by Detinova (1985) to accommodate species originally described by Averincev (1972) as Euphrosine cirratoformis . She distinguished Euphrosinella from Euphrosine mainly on the bases of the presence of five (instead of three) prostomial appendages. Characters such as the extent of fusion of caruncle to body wall and the absence of ringent chaetae were also suggested by Detinova (1985) but questioned by Kudenov (1993) . The genus currently contains only two valid species, both from the deep waters and/or Antarctic habitats. Euphrosinella cirratoformis is widely distributed in the Antarctic waters and was considered circumpolar ( Kudenov 1993 ), although recent molecular data suggest the presence of at least two distinct species ( Brasier et al. 2016 ). The second species, Euphrosinella paucibranchiata ( Hartman 1960 ) has been described from deep waters off California (Santa Cruz Basin, 1737 m depth) and has not been widely reported since.