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 Eranno sp. nov. Fig. 13D, E Diagnosis. Prostomium conical, as long as wide, shorter than peristomium. Nuchal antenna absent. All parapodia well developed, first four to five pairs of parapodia smaller than remaining parapodia. Prechaetal lobes inconspicuous in all parapodia, postchaetal lobes auricular in anterior parapodia (1-40), becoming small and rounded posteriorly, always longer than prechaetal lobes. Anterior parapodia with limbate chaetae and limbate simple hooded hooks. Clear simple multidentate hooded hooks present after chaetiger 25, with seven to eight teeth and long blades, all of similar size. In median chaetigers (27-40) part of limbate chaetae exceedingly longer than in the remaining chaetigers and ~ twice as long as hooded hooks. Maxillary apparatus dark, with five pairs of maxillae, elongated. Maxillary carriers shorter than MI. MI forceps-like with attachment lamellae, with narrow connecting plates. MII shorter than MI, with five teeth. MIII unidentate, completely pigmented, dark in colour. MIV unidentate, large, completely pigmented. MV reduced to attachment lamella, partly fused with MIV. Remarks. Limbate simple hooded hooks are not typical for Eranno and similar to those reported for Abyssoninoe , however, maxillary apparatus is of typical Eranno shape with narrow connecting plates and MII significantly shorter than MI. There is not enough information to consider this a new genus, but we suggest it is a new species. Records. 1 specimen. Suppl. material 1: op. 56 (AM).