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ID 28911
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title alternative
有明海産カラヌス目カイアシ類Tortanus derjuginiおよび東アジアにおける汽水性カイアシ類の地理分布
creator
Lian, Guang-shan
subject
Tortanus (Eutortanus) derjugini
Ariake Sea
East Asia
brackish-water
continental relict
NDC
Zoology
abstract
Tortanus (Eutortanus) derjugini Smirnov is redescribed from brackish regions of the Ariake Sea, western Japan. The copepod is presumed to be an Asian continental relict because of its exclusive occurrence in Asian continental waters and the Ariake Sea in Japan. A comparison between specimens from Japanese, Korean and Chinese waters is made, and some differences were detected in the anal somite and caudal rami of females between Japanese and Korean specimens; the length/width ratio of the anal somite and the ratio of the right caudal ramus to the left one are significantly lower in the former. These differences indicate that the isolation of the Ariake Sea population from the Asian continental populations since the last transgression (ca. 6,000-10,000 years ago) has caused no great morphological variation. Zoogeography of brackish-water calanoid copepods including this species in East Asia is discussed. There are three types of distribution patterns that are supposed to be related to geological events occurring during the Cenozoic era.
journal title
日本プランクトン学会報
volume
Volume 42
issue
Issue 2
start page
147
end page
162
date of issued
1995-12-25
publisher
日本プランクトン学会
issn
0387-8961
ncid
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 1995 The Plankton Society of Japan
department
Graduate School of Biosphere Science