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Type: Articles
Published: 2010-04-19
Page range: 43–51
Abstract views: 34
PDF downloaded: 1

Dinonemertes shinkaii sp. nov., (Nemertea: Hoplonemertea: Polystilifera: Pelagica) a new species of bathypelagic nemertean

Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
Japan Agency for Marine-Earth Science and Technology, Natsushima-cho 2-15, Yokosuka 237-0061, Japan
Nemertea Pacific Japan Trench plankton manned submersible Shinkai 6500 taxonomy striated muscle

Abstract

A new species of bathypelagic polystiliferous nemertean Dinonemertes shinkaii is described based on the holotype obtained by the manned submersible Shinkai 6500 from a depth of 2343 m in Japan Trench, Northwest Pacific. Dinonemertes shinkaii can be distinguished from its congeners in having a translucent body, 24 proboscis nerves, two pairs of intestinal caecal diverticula, and about 25 pairs of intestinal lateral diverticula. This species represents the first dinonemertid to have pseudostriated muscle fibres in the rhynchocoel circular muscle layers.

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