Copepoda source details
Tung, C.H., Y.R. Cheng, C.Y. Lin, J.S. Ho, C.H. Kuo, J.K. Yu & Y.H. Su. (2014). A new copepod with transformed body plan and unique phylogenetic position parasitic in the acorn worm Ptychodera flava. Biological Bulletin. 226(1): 69-80.
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Tung, C.H., Y.R. Cheng, C.Y. Lin, J.S. Ho, C.H. Kuo, J.K. Yu & Y.H. Su
2014
A new copepod with transformed body plan and unique phylogenetic position parasitic in the acorn worm <i>Ptychodera flava</i>.
Biological Bulletin
226(1): 69-80.
Publication
Available for editors [request]
Symbiotic copepods compose one-third of the
known copepod species and are associated with a wide
range of animal groups. Two parasitic copepods endoparasitic
in acorn worms (Hemichordata), Ive balanoglossi and
Ubius hilli, collected in the Mediterranean Sea and Australian
waters, respectively, were described a century ago.
Here we report a new parasitic copepod species, Ive ptychoderae
sp. nov., found in Ptychodera flava, a widespread
acorn worm in the Indo-Pacific Ocean and an emerging
organism for developmental and evolutionary studies. The
female of I. ptychoderae is characterized by having a reduced
maxilliped and five pairs of annular swellings along
the body that are morphologically similar but distinguishable
from those in the two previously described parasitic
copepods in acorn worms. Phylogenetic analysis based on
the 18S rDNA sequence shows that I. ptychoderae may
belong to Poecilostomatoida but represent a new family,
which we name Iveidae fam. nov. Ive ptychoderae is commonly
found in the acorn worm population with an average
prevalence of 42% during the collecting period. The infection
of the parasite induces the formation of cysts and
causes localized lesions of the host tissues, suggesting that
it may have negative effects on its host. Interestingly, most
cysts contain a single female with one or multiple male
copepods, suggesting that their sex determination may be
controlled by environmental conditions. The relationships
between the parasitic copepods and acorn worms thus provide
a platform for understanding physiological and ecological
influences and coevolution between parasites and hosts.
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Ive ptychoderae Tung, Cheng, Lin, Ho, Kuo, Yu & Su, 2014 (original description)
Iveidae Tung, Cheng, Lin, Ho, Kuo, Yu & Su, 2014 (original description)
Ubius Kesteven, 1913 (taxonomy source)
Iveidae Tung, Cheng, Lin, Ho, Kuo, Yu & Su, 2014 (original description)
Ubius Kesteven, 1913 (taxonomy source)