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タイトル: A new species of hermit crab, Diogenes heteropsammicola (Crustacea, Decapoda, Anomura, Diogenidae), replaces a mutualistic sipunculan in a walking coral symbiosis
著者: Igawa, Momoko
Kato, Makoto
著者名の別形: 井川, 桃子
加藤, 眞
発行日: 20-Sep-2017
出版者: Public Library of Science
誌名: PLoS ONE
巻: 12
号: 9
論文番号: e0184311
抄録: Symbiont shift is rare in obligate mutualisms because both the partners are reciprocally dependent on and specialized to each other. In the obligate accommodation–transportation mutualism between walking corals and sipunculans, however, an unusual saltatory symbiont shift was discovered. In shallow waters of southern Japan, an undescribed hermit crab species was found living in corallums of solitary scleractinian corals of the genera Heterocyathus and Heteropsammia, replacing the usual sipunculan symbiont. We described the hermit crab as a new species Diogenes heteropsammicola (Decapoda, Anomura, Diogenidae), and explored its association with the walking corals. This hermit crab species obligately inhabits the coiled cavity of the corals, and was easily distinguished from other congeneric species by the exceedingly slender chelipeds and ambulatory legs, and the symmetrical telson. Observations of behavior in aquaria showed that the new hermit crab, like the sipunculan, carries the host coral and prevents the coral from being buried. This is an interesting case in which an organism phylogenetically distant from Sipuncula takes over the symbiotic role in association with a walking coral. The hermit crab species is unique in that its lodging is a living solitary coral that grows with the hermit crab in an accommodation–transportation mutualism.
記述: 「生きている家」を持ち運ぶ新種ヤドカリ. 京都大学プレスリリース. 2017-10-06.
著作権等: © 2017 Igawa, Kato. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
URI: http://hdl.handle.net/2433/227462
DOI(出版社版): 10.1371/journal.pone.0184311
関連リンク: http://www.kyoto-u.ac.jp/ja/research/research_results/2017/170920_1.html
出現コレクション:学術雑誌掲載論文等

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