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New sea spider species (Pycnogonida : Austrodecidae) from a submarine cave in Japan
| Title: | New sea spider species (Pycnogonida : Austrodecidae) from a submarine cave in Japan |
| Authors: | Kakui, Keiichi Browse this author →KAKEN DB | | Fujita, Yoshihisa Browse this author →KAKEN DB |
| Keywords: | Akuma-no-Yakata | | anchialine | | Chelicerata | | palp | | Pantopipetta | | Pantopoda | | Stiripasterida |
| Issue Date: | 2023 |
| Publisher: | Cambridge University Press |
| Journal Title: | Journal of the Marine Biological Association of the United Kingdom |
| Volume: | 103 |
| Publisher DOI: | 10.1017/S0025315423000322 |
| Abstract: | We describe a new sea spider species, Pantopipetta hosodai sp. nov., based on one juvenile female collected from a submarine cave ('Akumanoyakata' Cave) in Shimojijima Island, Miyako Island Group, Ryukyu Islands, southwestern Japan. It was collected from the second slope zone of the cave, 80-100 m from the entrance, no light, low salinity and with rocky substrate. This is the first record globally of a Pantopipetta species from a submarine cave and anchialine environment. Pantopipetta hosodai sp. nov. resembles Pantopipetta auxiliata, Pantopipetta lenis and Pantopipetta oculata in having auxiliary claws, but differs from them in having a palp with three short distal articles, lateral processes without dorsodistal tubercles, coxae 1 and 3 of legs 1-3 each with one long dorsal tubercle and one dorsodistal tubercle bearing a seta on each femur. Features of the palp appear to delineate two species groups in Pantopipetta, i.e. (1) those having four small distal articles, and a small, basal palp article between the lateral cephalon process and longest palp article (eight-articulate palp) and (2) those having three small distal articles, and lacking the small basal article (six-articulate palp), but further detail examination of the described species is needed. We discuss the diagnostic characters separating Pantopipetta and Austrodecus and the generic affiliation of Austrodecus aconae. Few pycnogonids from marine or anchialine caves have been identified to species, and it is generally unknown whether cave-dwelling pycnogonids tend to be troglobites. |
| Rights: | This article has been published in a revised form in Journal of the Marine Biological Association of the United Kingdom [https://doi.org/10.1017/S0025315423000322]. This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works. © The Author(s). |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/91021 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 角井 敬知
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