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 Laonice cf. blakei Sikorski & Jirkov in Sikorski, Jirkov and Tzetlin 1988 Fig. 31F Diagnosis. Specimens all anterior fragments, almost all in very poor condition, usually very short, only two specimens with> 20 chaetigers. Prostomium bell-shaped, anteriorly broadly rounded; small cirriform occipital tentacle present at posterior end; eyes absent. Nuchal organ if discernible with yellow pigment, extending to ~ chaetiger 8 in best preserved specimens. Peristomium moderately developed and not fused to prostomium. Branchiae from chaetiger 2, cirriform, separate from dorsal lamellae (mostly lost in present material). Interparapodial pouches present from between chaetigers 3 and 4. Parapodial lamellae broad, particularly foliaceous in notopodia of the anterior mid-body. Capillaries arranged in two or three rows in anterior notopodia, in neuropodia in two rows. Sabre chaetae first present from chaetigers 10-13, appearing first as up to five capillaries in inferiormost position, in hook-bearing chaetigers usually as one or two stout granulated chaetae. Hooded hooks first observed in neuropodia of chaetigers 17-19, numerous (numbering 15), with four apical teeth above main fang; in notopodia hooks absent. Dorsal crests not observed. Pygidium unknown. Remarks. The morphology of specimens examined is in accordance with diagnostic characters for L. blakei . Important characters are the start of interparapodial pouches between chaetigers 3 and 4, prostomium not fused to the peristomium, the start of sabre chaetae not before chaetigers 10, and of neuropodial multidentate hooded hooks from about chaetigers 20. However, most of the specimens from IN2017_V03 were in very poor condition and not all diagnostic characters could be observed in each specimen. Laonice blakei is known from deep waters of the Atlantic Ocean and Nordic Seas but has not been reported before from Australian waters or the Pacific Ocean in general. Considering this we refer to our specimens as L. cf. blakei . Records. 11 specimens. Suppl. material 1: ops. 9, 31, 33, 42, 55, 76, 79 (AM).