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ID 33921
file
creator
Boxshall, Geoffrey A.
Srinui, Khwanruan
subject
copepod
rhizostome medusa
Paramacrochiron
phylogeny
Rhopilema hispidum
symbiont
NDC
Biology
abstract
Paramacrochiron thailandicum n. sp. (Copepoda: Cyclopoida: Macrochironidae) is described from the rhizostome medusa Rhopilema hispidum occurring in the Gulf of Thailand. The new species is distinguishable from other congeners mainly by detailed features of the fourth legs and the urosome in both sexes. Copepodid and adult stages of the genus Paramacrochiron seem to be host-specific to rhizostome medusae, but may spend periods free in the plankton or benthos during the absence of the host. A cladistic analysis shows that the Macrochironidae comprises two main lineages. Paramacrochiron is recovered as a monophyletic group, located on one lineage together with Pseudomacrochiron, which appears as a paraphyletic taxon with the limited character set used. The other main lineage comprises the genera Macrochiron and Sewellochiron, but the sole species of the latter genus, Sewellochiron fidens, is nested within Macrochiron. This analysis provides little support for maintaining Sewellochiron as a separate genus.
journal title
Zoological Science
volume
Volume 29
issue
Issue 2
start page
127
end page
133
date of issued
2012
publisher
公益社団法人日本動物学会
issn
0289-0003
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
(c) 2012 Zoological Society of Japan
relation url
department
Graduate School of Biosphere Science