{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,17]],"date-time":"2026-06-17T15:51:33Z","timestamp":1781711493565,"version":"3.54.5"},"reference-count":48,"publisher":"Pensoft Publishers","license":[{"start":{"date-parts":[[2026,6,17]],"date-time":"2026-06-17T00:00:00Z","timestamp":1781654400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["ZK"],"abstract":"<jats:p>\n                    A new species of\n                    <jats:italic>Phalacrostemma<\/jats:italic>\n                    (Annelida, Sabellariidae) is described based on the specimens collected at a depth of 675 m on the Ritto Seamount of the West Mariana Ridge, northwestern Pacific. This record represents both the deepest occurrence of Sabellariidae in Japan and the first record of the genus\n                    <jats:italic>Phalacrostemma<\/jats:italic>\n                    from the region.\n                    <jats:italic>Phalacrostemma ritto<\/jats:italic>\n                    <jats:bold>sp. nov<\/jats:bold>\n                    . dwells in a tube made of small sand particles and foraminiferans, which is attached to the spines of a cidarid sea urchin. The new species is characterized by having 22\u201330 pairs of outer paleae arranged in a spiral, outer paleae with acute tips and compact thecae, one or two inner paleae in each row, 8\u201313 opercular papillae on each side, five pairs of nuchal hooks with curved tips, a pair of slender ventral lobes on the first chaetiger, a single pair of conical papillae on the second chaetiger, bilobed notopodia in the middle to posterior abdomen, and abdominal uncini bearing three rows of teeth. A phylogenetic analysis, which included the new species and the newly sequenced\n                    <jats:italic>Idanthyrsus okudai<\/jats:italic>\n                    and\n                    <jats:italic>Sabellaria isumiensis<\/jats:italic>\n                    and was based on sequences of four gene fragments (COI, 16S, 18S, and 28S), was conducted. The new species was nested within the fully supported\n                    <jats:italic>Phalacrostemma<\/jats:italic>\n                    clade and recovered as the sister taxon to\n                    <jats:italic>Gesaia csiro<\/jats:italic>\n                    , whereas support values for phylogenetic relationships among sabellariid species were generally low.\n                  <\/jats:p>","DOI":"10.3897\/zookeys.1282.191792","type":"journal-article","created":{"date-parts":[[2026,6,17]],"date-time":"2026-06-17T14:53:02Z","timestamp":1781707982000},"page":"305-321","source":"Crossref","is-referenced-by-count":0,"title":["A new species of Phalacrostemma (Annelida, Sabellariidae) from the West Mariana Ridge, northwestern Pacific"],"prefix":"10.3897","volume":"1282","author":[{"given":"Eijiroh","family":"Nishi","sequence":"first","affiliation":[{"name":"College of Education, Yokohama National University, Yokohama, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Genki","family":"Kobayashi","sequence":"additional","affiliation":[{"name":"The Center for Molecular Biodiversity Research, National Museum of Nature and Science, Tsukuba, Japan"},{"name":"Environment and Safety Sciences Course, Department of Educational Collaboration, Osaka Kyoiku University, Kashiwara, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Naoto","family":"Jimi","sequence":"additional","affiliation":[{"name":"Sugashima Marine Biological Laboratory, Graduate School of Science, Nagoya University, Sugashima, Japan"},{"name":"Centre for Marine and Coastal Studies, Universiti Sains Malaysia, Penang, Malaysia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshihiro","family":"Fujiwara","sequence":"additional","affiliation":[{"name":"Research Institute for Marine Technology and Engineering, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elena K.","family":"Kupriyanova","sequence":"additional","affiliation":[{"name":"Australian Museum Research Institute, Australian Museum, Sydney, Australia"},{"name":"Department of Biological Sciences, Macquarie University, North Ryde, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2258","published-online":{"date-parts":[[2026,6,17]]},"reference":[{"key":"191792_B1","doi-asserted-by":"publisher","DOI":"10.1093\/sysbio\/syr041"},{"key":"191792_B2","doi-asserted-by":"publisher","DOI":"10.1089\/cmb.2012.0021"},{"key":"191792_B3","doi-asserted-by":"publisher","DOI":"10.1016\/j.ympev.2012.08.023"},{"key":"191792_B4","doi-asserted-by":"publisher","DOI":"10.1071\/ZO99026"},{"key":"191792_B5","unstructured":"Capa M, Hutchings P (2014) Sabellariidae Johnston, 1865. 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