Molecular phylogenetic analysis of a known and a new hydrothermal vent octopod: their relationships with the genus Benthoctopus (Cephalopoda: Octopodidae) Author Strugnell, Jan Department of Zoology, University of Cambridge, Downing Street, Cambridge CB 2 3 EJ, UK School of Biological Sciences, Queen's University Belfast, 97 Lisburn Road, Belfast BT 9 7 BL, UK Department of Zoology, Field Museum of Natural History, 1400 S. Lake Shore Dr, Chicago, IL 60605 - 2496, USA Duke Marine Laboratory, 135 Duke Marine Lab Road, Beaufort, NC 28516, USA The Martin Ryan Marine Science Institute, National University of Ireland, Galway, University Road, Galway, Ireland Corresponding author: jan. strugnell @ gmail. com Author Voight, Janet R. Author Collins, Patrick C. Author Allcock, A. Louise text Zootaxa 2009 2009-05-11 2096 1 442 459 https://biotaxa.org/Zootaxa/article/view/zootaxa.2096.1.27 journal article 10.11646/zootaxa.2096.1.27 1175-5326 5321990 Benthoctopus Grimpe Emended diagnosis. Deepwater incirrate octopodids. Arms 1.5–4 times ML. Suckers biserial. Ligula slightly to moderately excavated with indistinct midrib, smooth or bearing low, often indistinct rugae, never laminate. Crop present, usually with diverticulum. Ink sac absent, anal flaps absent. Radula with multicuspid rachidian. Type species: Octopus piscatorum Verrill, 1879 . By original designation. Remarks . Octopus piscatorum was designated a junior synonym of Bathypolypus bairdii by Muus (2002) and the genus Benthoctopus is currently invalid. We continue to use the name as an interim measure because this large group of rarely acquired and potentially highly diverse species requires further attention before nomenclatural acts are made, to ensure that such acts provide nomenclatural stability rather than create additional uncertainty.