European Journal of Taxonomy 604: 1–35 ISSN 2118-9773 https://doi.org/10.5852/ejt.2020.604 www.europeanjournaloftaxonomy.eu 2020 · Marin I. This work is licensed under a Creative Commons Attribution Licence (CC BY 4.0). Research article urn:lsid:zoobank.org:pub:7F2F71AA-4282-477C-9D6A-4C5FB417259D Thoridae (Crustacea: Decapoda) can penetrate the Abyss: a new species of Lebbeus from the Sea of Okhotsk, representing the deepest record of the family Ivan MARIN A.N. Severtzov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, Russia. Email:
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[email protected] urn:lsid:zoobank.org:author:B26ADAA5-5DBE-42B3-9784-3BC362540034 Abstract. Lebbeus sokhobio sp. nov. is described from abyssal depths (3303−3366 m) in the Kuril Basin of the Sea of Okhotsk. The related congeners are deep-water dwellers with a very distant distribution and very similar morphology. The new species is separated by minor morphological features, such as the armature of the rostrum and telson, meral spinulation of ambulatory pereiopods and the shape of the pleonal pleurae. This species is the deepest dwelling representative of the genus Lebbeus and the family Thoridae. A list of records of caridean shrimps recorded from abyssal depths below 3000 m is given. Keywords. Diversity, Caridea, barcoding, SokhoBio 2015, NW Pacifi c. Marin I. 2020. Thoridae (Crustacea: Decapoda) can penetrate the Abyss: a new species of Lebbeus from the Sea of Okhotsk, representing the deepest record of the family. European Journal of Taxonomy 604: 1–35. https://doi.org/10.5852/ejt.2020.604 Introduction The fauna of benthic caridean shrimps (Crustacea: Decapoda: Caridea) living at depths of more than 3000 m is poorly known due to the technical diffi culties of sampling.