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Zookeys. 2019 Dec 9;897:1-18. doi: 10.3897/zookeys.897.37061. eCollection 2019.

A new species of Nebalia (Crustacea, Leptostraca) from a hydrothermal field in Kagoshima Bay, Japan.

Author information

1
Graduate School of Environment and Information Sciences, Yokohama National University, 79-2 Tokiwadai, Hodogaya, Yokohama, Kanagawa 240-8501, Japan Yokohama National University Yokohama Japan.
2
Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima-cho, Yokohama, Kanagawa 237-0061, Japan Japan Agency for Marine-Earth Science and Technology Yokohama Japan.

Abstract

A new species of Leptostraca, Nebalia tagiri sp. nov. is described and illustrated. This species was sampled from 200 m depth at a hydrothermal field in Wakamiko Caldera of Kagoshima Bay, Japan. Nebalia tagiri sp. nov. is different from known Nebalia species as follows: rostral length 2.4 times as long as width; article 4 of antennule with 3-5 robust distal spines; antennular scale approximately twice as long as wide; article 3 of antenna with eight spines and nine spine-like setae along proximal half, two thin setae and six spine-like setae on external lateral face, six spines and four simple setae on distal margin; article 1 of second maxilla longer than article 2; article 2 of mandibular palp with two thin setae; exopod of pleopod 1 with 21 spines along lateral margin; furcal rami longer than combined length of pleonite 7 and telson; rounded denticles of pleonite 6 and 7; anal-plates 'shoulder' not distinct. Furthermore, this specimen is the first genus Nebalia found in the hydrothermal vent. The distribution and ecology of this new species is also discussed and a key to all species of Nebalia is provided.

KEYWORDS:

Leptostraca ; Malacostraca ; Nebalia ; Hydrothermal vent; key; new species

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