Vol. 51 No. 7, 2012
First Records of Peltogastrid Rhizocephalans (Crustacea: Cirripedia:
Rhizocephala) on Hermit Crabs (Paguroidea) in Taiwan and Differences in
Prevalences among Collection Sites
Ryuta Yoshida1,*, Mamiko Hirose1, Hin-Kiu Mok2, and Euichi Hirose1
1Faculty of Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan
2Institute of Marine Biology, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
Ryuta Yoshida, Mamiko Hirose, Hin-Kiu Mok, and Euichi Hirose (2012) From
collections of 3073 individual hermit crabs in Taiwan, representing 56
species, 53 individuals of 3 different species were found to be
infested by 3 species of rhizocephalans: Peltogaster postica on Pagurus angustus, Septosaccus cf. snelliusi on Diogenes tumidus, and Dipterosaccus indicus on Calcinus morgani.
Rhizocephalans were identified based on histological sections, and
species identifications were consistent with partial sequences of the
cytochrome c oxidase subunit
I (COI) gene. This is the 1st record of peltogastrid
rhizocephalans (Crustacea, Cirripedia) from Taiwan. The
prevalence of peltogastrid species greatly differed among the
collection sites, and hosts for Pel. postica and Dip. indicus
differed from previously known hosts in the Ryukyus and other
sites. The microhabitat of the host species may be crucial to
rhizocephalan parasitism success.
Key words: Parasitic crustacean, Peltogastridae, Hermit crab, Prevalence, Taiwan.
*Correspondence: Tel: 81-98-895-8880. Fax: 81-98-895-8576. E-mail:firstname.lastname@example.org