{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,30]],"date-time":"2026-03-30T16:12:00Z","timestamp":1774887120967,"version":"3.50.1"},"reference-count":35,"publisher":"Pensoft Publishers","license":[{"start":{"date-parts":[[2026,3,30]],"date-time":"2026-03-30T00:00:00Z","timestamp":1774828800000},"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                    We describe two new species of the genera\n                    <jats:italic>Cryptophallus<\/jats:italic>\n                    Bock, 1913 and\n                    <jats:italic>Limnoplana<\/jats:italic>\n                    Faubel, 1983, which have not been reported for nearly a century. Herein, the genus\n                    <jats:italic>Limnoplana<\/jats:italic>\n                    represents a rare group of polyclads inhabiting brackish waters.\n                    <jats:italic>Cryptophallus sinensis<\/jats:italic>\n                    <jats:bold>sp. nov<\/jats:bold>\n                    . is characterized by: i) a grayish-brown dorsal surface with a slightly darker median region, ii) numerous cerebral eyespots forming two scarcely separate clusters, and iii) an ejaculatory duct joining the prostatic duct at the distal end of the penis.\n                    <jats:italic>Limnoplana obscuriviridis<\/jats:italic>\n                    <jats:bold>sp. nov<\/jats:bold>\n                    . is distinguished from its congeners by: i) the presence of a true seminal vesicle, ii) a heart-shaped brain, iii) gonopores positioned closer to the posterior end of the body, and iv) a U-shaped Lang\u2019s vesicle with two swollen ends. We provide the first partial DNA maker sequences for these two new species and employ them to analyze the phylogenetic relationships of their corresponding genera. Our molecular phylogenetic analyses show that\n                    <jats:italic>Cryptophallus<\/jats:italic>\n                    and\n                    <jats:italic>Limnoplana<\/jats:italic>\n                    are nested within the Stylochoidea clade. In addition, we have revised the genus\n                    <jats:italic>Cryptophallus<\/jats:italic>\n                    ; its familial affiliation remains unresolved, and additional species are required to clarify its phylogenetic position.\n                  <\/jats:p>","DOI":"10.3897\/zookeys.1275.180665","type":"journal-article","created":{"date-parts":[[2026,3,30]],"date-time":"2026-03-30T15:26:58Z","timestamp":1774884418000},"page":"211-227","source":"Crossref","is-referenced-by-count":0,"title":["Morphology and phylogeny of two acotylean flatworms (Platyhelminthes, Polycladida) from the genera Cryptophallus and Limnoplana in the South China Sea"],"prefix":"10.3897","volume":"1275","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-4677-0568","authenticated-orcid":true,"given":"Hai-Long","family":"Liu","sequence":"first","affiliation":[{"name":"College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China"},{"name":"College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-9323-6050","authenticated-orcid":true,"given":"Bing-Bing","family":"He","sequence":"additional","affiliation":[{"name":"College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5045-9165","authenticated-orcid":true,"given":"Shuang-Fei","family":"Li","sequence":"additional","affiliation":[{"name":"College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4222-9535","authenticated-orcid":true,"given":"An-Tai","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2596-8515","authenticated-orcid":true,"given":"Zhang-Li","family":"Hu","sequence":"additional","affiliation":[{"name":"College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7378-6946","authenticated-orcid":true,"given":"Yu","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"2258","published-online":{"date-parts":[[2026,3,30]]},"reference":[{"key":"180665_B1","doi-asserted-by":"publisher","DOI":"10.1007\/s13127-017-0344-4"},{"key":"180665_B2","doi-asserted-by":"publisher","DOI":"10.11646\/zootaxa.3170.1.3"},{"key":"180665_B3","doi-asserted-by":"publisher","DOI":"10.1007\/s13127-017-0327-5"},{"key":"180665_B4","unstructured":"Bock S (1913) Studien \u00fcber Polycladen. Zoologiska Bidrag fr\u00e5n Uppsala 2: 31\u2013344."},{"key":"180665_B5","unstructured":"Bock S (1925) Papers from Dr. Th. Mortensen\u2019s Pacific Expedition 1914\u20131916. XXVII. Planarians, Pt. IV. New stylochids. Videnskabelige Meddelelser fra Dansk naturhistorisk Forening i Kj\u00f8benhavn 79: 97\u2013184."},{"key":"180665_B6","doi-asserted-by":"publisher","DOI":"10.1007\/s13127-019-00415-1"},{"key":"180665_B7","doi-asserted-by":"publisher","DOI":"10.26107\/RBZ-2025-0025"},{"key":"180665_B8","unstructured":"Faubel A (1983) The Polycladida, Turbellaria Proposal and establishment of a new system Part I. The Acotylea. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut 80: 17\u2013121."},{"key":"180665_B9","unstructured":"Faubel A (1984) The Polycladida, Turbellaria; Proposal and establishment of a new system. Part II. The Cotylea. 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