Comparative Parasitology 67(1) 2000 - Peru State College

64 COMPARATIVE PARASITOLOGY, 67(1), JANUARY 2000
scribed as Polystoma dendriticum by Ozaki
(1948) from individuals taken from the urinary
bladder of O. japonicus. Yamaguti (1963) revised
the taxonomy. Uchida and Itagaki (1979)
reported it from the same host. This is the third
report of P. dendriticum; the only known host is
O. japonicus.
In addition to these trematodes, 111 females
and 13 males of Parapharyngodon japonicus
were harbored by 26 (38%) O. japonicus, the
only known host. To our knowledge, there are no
other reports of Parapharyngodon from Japanese
salamanders; however, Hasegawa (1988) reported
an unidentified but different species of Parapharyngodon
from a lizard, the Japanese ateuchosaurus,
Ateuchosaurus pellopleurus (Hallowell,
1860), from Okinawa, Japan.
The single acanthocephalan was too immature
to identify. Van Cleave (1925) described Acanthocephalus
nanus from the intestine of Triturus
(=Diemictylus) pyrrhogaster and Rana rugosa
from Japan and Pearse (1932) reported A. nanus
as well as unidentified encysted acanthocephalans
from T. pyrrhogaster and the giant salamander,
Megalobatrachus japonicus (Temminck,
1837), collected near Tokyo. This is the
first report of acanthocephalan cystacanths in O.
japonicus.
All helminths were deposited in the United
States National Parasite Collection, Beltsville,
Maryland: Cephalouterina leoi, USNPC 88648;
Mesocoelium brevicaecum, USNPC 88649;
Pseudopolystoma dendriticum, USNPC 88650;
Parapharyngodon japonicus, USNPC 88651;
acanthocephalan cystacanth, USNPC 88652. A
list of the known parasites of O. japonicus is
given in Table 2. More work will be required to
determine the distribution patterns and the variety
of hosts of the helminths found in this
study.
Acknowledgments
We thank Tatsuo Ishihara (Hakone Woodland
Museum, Hakone, Japan) for the sample of Onychodactylus
japonicus, Peggy Firth for the illustrations
constituting Figures 1—9, and Hay
Cheam for assistance with dissections.
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Copyright © 2011, The Helminthological Society of Washington
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