{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T09:08:19Z","timestamp":1789117699177,"version":"build-2803163510"},"reference-count":35,"publisher":"PeerJ","license":[{"start":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T00:00:00Z","timestamp":1789084800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Khon Kaen University International College","award":["KKUIC-01RF26"],"award-info":[{"award-number":["KKUIC-01RF26"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>\n                    The genus\n                    <jats:italic>Mongolodiaptomus<\/jats:italic>\n                    Kiefer currently contains 17 species, distributed across Asia, predominantly occurring in countries in the lower Mekong River Basin. Herein,\n                    <jats:italic>Mongolodiaptomus rarus<\/jats:italic>\n                    (Ranga Reddy, Sanoamuang &amp; Dumont, 1998), an incompletely described species, is redescribed based on specimens from Thailand. Morphologically, it belongs to the\n                    <jats:italic>M. gladiolus<\/jats:italic>\n                    species group, closely similar to\n                    <jats:italic>M.\u00a0calcarus<\/jats:italic>\n                    (Shen &amp; Tai, 1965),\n                    <jats:italic>M. dumonti<\/jats:italic>\n                    Sanoamuang, 2001, and\n                    <jats:italic>M. gladiolus<\/jats:italic>\n                    (Shen &amp; Lee, 1963).\n                    <jats:italic>M<\/jats:italic>\n                    .\n                    <jats:italic>rarus<\/jats:italic>\n                    is, however, distinctly different from its congeners, in particular the prolonged oval shape of the male right leg 5-second exopod and the position and shape of the principal lateral spine on this segment.\n                    <jats:italic>Mongolodiaptomus rarus<\/jats:italic>\n                    occurs mostly in temporary-water habitats, although it also inhabits swamps, which are permanent-water habitats. It appears to be rare, restricted to a few localities, and has to date been recorded from 20 sites in five provinces. Currently,\n                    <jats:italic>M. rarus<\/jats:italic>\n                    is endemic to northeast Thailand. It was found during May and September, over a temperature range of 25\u201338\u00a0\u00b0C, pH 6.6\u20138.5, and conductivity of 2\u2013299 \u00b5S cm\n                    <jats:sup>\u22121<\/jats:sup>\n                    . The recent development of modern highway construction and the introduction of many agricultural crops have resulted in the disappearance of their habitats, so conservation of this rare taxon is proposed.\n                  <\/jats:p>","DOI":"10.7717\/peerj.21683","type":"journal-article","created":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T08:40:20Z","timestamp":1789116020000},"page":"e21683","source":"Crossref","is-referenced-by-count":0,"title":["Redescription of the rare, incompletely described\n                    <i>Mongolodiaptomus rarus<\/i>\n                    (Ranga Reddy, Sanoamuang &amp; Dumont, 1998) (Copepoda, Calanoida, Diaptomidae), from freshwater habitats in northeast Thailand, with comments on conservation status"],"prefix":"10.7717","volume":"14","author":[{"given":"Laorsri","family":"Sanoamuang","sequence":"first","affiliation":[{"name":"Laboratory of Biodiversity and Environmental Management, International College, Khon Kaen University, Khon Kaen, Thailand"},{"name":"Applied Taxonomic Research Center, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Prapatsorn","family":"Dabseepai","sequence":"additional","affiliation":[{"name":"Applied Taxonomic Research Center, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kamonwan","family":"Koompoot","sequence":"additional","affiliation":[{"name":"Applied Taxonomic Research Center, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"4443","published-online":{"date-parts":[[2026,9,11]]},"reference":[{"key":"10.7717\/peerj.21683\/ref-1","doi-asserted-by":"publisher","first-page":"245","DOI":"10.4081\/jlimnol.2013.s2.e12","article-title":"Cyclopoid and calanoid copepod biodiversity in 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