Annelids of the eastern Australian abyss collected by the 2017 RV ' Investigator' voyage Author Gunton, Laetitia M. Australian Museum Research Institute, Sydney, Australia laetitia.gunton@austmus.gov.au Author Kupriyanova, Elena K. Australian Museum Research Institute, Sydney, Australia & Macquarie University, Sydney, Australia Author Alvestad, Tom Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway Author Avery, Lynda Museums Victoria, Melbourne, Australia Author Blake, James A. https://orcid.org/0000-0001-8217-9769 Aquatic Research & Consulting, Duxbury, Massachusetts, USA Author Biriukova, Olga Museum and Art Gallery of the Northern Territory, Darwin, Australia Author Boeggemann, Markus University of Vechta, Vechta, Germany Author Borisova, Polina P. P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia Author Budaeva, Nataliya Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway & P. P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia Author Burghardt, Ingo Australian Museum Research Institute, Sydney, Australia Author Capa, Maria https://orcid.org/0000-0002-5063-7961 Department of Biology, University of the Balearic Islands, Palma, Spain Author Georgieva, Magdalena N. Natural History Museum, London, UK Author Glasby, Christopher J. https://orcid.org/0000-0002-9464-1938 Museum and Art Gallery of the Northern Territory, Darwin, Australia Author Hsueh, Pan-Wen Department of Life Sciences, National Chung Hsing University, Taichung City, China Author Hutchings, Pat Australian Museum Research Institute, Sydney, Australia & Macquarie University, Sydney, Australia Author Jimi, Naoto https://orcid.org/0000-0001-8586-3320 National Institute of Polar Research, Tachikawa, Tokyo, Japan Author Kongsrud, Jon A. Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway Author Langeneck, Joachim https://orcid.org/0000-0003-3665-8683 Department of Biology, University of Pisa, Pisa, Italy Author Meissner, Karin Forschungsinstitut Senckenberg, DZMB, Hamburg, Germany Author Murray, Anna https://orcid.org/0000-0002-1765-1286 Australian Museum Research Institute, Sydney, Australia Author Nikolic, Mark Museums Victoria, Melbourne, Australia Author Paxton, Hannelore https://orcid.org/0000-0001-7086-5219 Australian Museum Research Institute, Sydney, Australia & Macquarie University, Sydney, Australia Author Ramos, Dino https://orcid.org/0000-0002-4069-5383 Natural History Museum, London, UK Author Schulze, Anja Texas A & M University at Galveston, Galveston, TX, USA Author Sobczyk, Robert Department of Zoology of Invertebrates and Hydrobiology, University of Lodz, Lodz, Poland Author Watson, Charlotte Museum and Art Gallery of the Northern Territory, Darwin, Australia Author Wiklund, Helena Natural History Museum, London, UK & Gothenburg Global Biodiversity Centre and University of Gothenburg, Gothenburg, Sweden Author Wilson, Robin S. https://orcid.org/0000-0002-9441-2131 Museums Victoria, Melbourne, Australia Author Zhadan, Anna Biological Faculty, Lomonosov Moscow State University, Moscow, Russia Author Zhang, Jinghuai South China Sea Environmental Monitoring Centre, State Oceanic Administration, Guangzhou, China text ZooKeys 2021 2021-02-24 1020 1 198 http://dx.doi.org/10.3897/zookeys.1020.57921 journal article http://dx.doi.org/10.3897/zookeys.1020.57921 1313-2970-1020-1 CC23B8CE8C8E473CBD8C44E74252A33D F6561609F0F15EE8907C94528CA44E4F Bathypolaria magnicirrata (Neal, Barnich, Wiklund & Glover, 2012) Diagnosis. Specimens with short bodies, 18-19 segments, nine pairs of small, reduced elytrophores (all elytra missing). Everted pharynx light brown, with seven pairs of similar-sized terminal papillae, two pairs of smooth amber-coloured jaws. Prostomium wider than long, bilobed, eyes absent, median antenna present on small cylindrical ceratophore, style long, tapering. Lateral antennae and frontal filaments absent. Long smooth palps present, inserted ventrolaterally. Tentacular segment fused to prostomium, tentaculophores achaetous, styles filiform, long, ventral style longer than dorsal style. Cirrophores on non-elytrigerous segments more prominent than elytrophores, large, cylindrical anteriorly. Parapodia biramous, elongate with notopodia almost as long as neuropodia, aciculae penetrating epidermis. Ventral cirri inserted subdistally from segment 3. Notopodia with long flattened, wide chaetae with fine serrations along one side, tips pointed, unidentate. Neurochaetae slenderer than notochaetae, flattened and with fine serrations along both sides of each chaeta. Posterior ventral keel present. Remarks. Austropolaria was originally described as a monotypic genus, based on A. magnicirrata described by Neal et al. (2012) from 1000-1500 m in the Amundsen Sea of the Antarctic region. These specimens agree closely with this species diagnosis including that the pharynx has seven pairs of terminal papillae, nine pairs of reduced elytrophores, large dorsal tubercles, and a posterior ventral keel. Kolbasova et al. (2020) showed that the monotypic genus Austropolaria is a junior synonym of Bathypolaria Levenstein, 1981 so the combination of the type species Bathypolaria magnicirrata (Neal, Barnich, Wiklund & Glover, 2012) was implicit. Records. 8 specimens. Suppl. material 1: ops. 23, 45, 110 (AM).