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First record of the poorly known pelagic nemertean Protopelagonemertes beebei (Nemertea: Hoplonemertea: Polystilifera: Pelagica) from Japanese waters, with discussion of the species identity

Published online by Cambridge University Press:  03 March 2011

Hiroshi Kajihara ,
Toru Katoh  and
Dhugal J. Lindsay
Hiroshi Kajihara*
Affiliation:
Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
Toru Katoh
Affiliation:
Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
Dhugal J. Lindsay
Affiliation:
Japan Agency for Marine–Earth Science and Technology, Natsushima-cho 2-15, Yokosuka 237-0061, Japan
*
Correspondence should be addressed to:H. Kajihara, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan email: kazi@mail.sci.hokudai.ac.jp
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Abstract

Two specimens of the pelagic nemertean Protopelagonemertes beebei Coe, 1936 were collected in Sagami Bay, Japan. Kimura-2-parameter distance based on the partial sequences (616 base pairs) of cytochrome c oxidase gene between the present material and that previously reported as an unidentified specimen of the genus Protopelagonemertes collected from off California, USA was 5.6%, implying that these are closely related, and may belong to the same species. A description of the internal morphology based on serial transverse sections of the body is provided. The material showed an intermediate character state in the number of proboscis nerves between what had formerly been reported as P. beebei and P. hubrechti (Brinkmann, 1917), posing a question on the species delimitation.

Keywords

RV ‘Tanseimaru’new recordtaxonomyProtopelagonemertes beebei
Type
Research Article
Information
Marine Biodiversity Records , Volume 4 , December 2011 , e13
Copyright
Copyright © Marine Biological Association of the United Kingdom 2011

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