{"title":"Four广东淡水蟹属（Megapleonum Huang, Shih & Ahyong, 2018）新种（甲壳纲，十足目，蟹科）。","authors":"Chao Huang, Hsi-Te Shih, Shane T Ahyong","doi":"10.3897/zookeys.1244.148112","DOIUrl":null,"url":null,"abstract":"<p><p>Four new species of the poorly known genus <i>Megapleonum</i> Huang, Shih & Ahyong, 2018, are described from Guangdong Province, China: <i>Megapleonumfalx</i> <b>sp. nov.</b> from Huizhou City, <i>M.yangdongense</i> <b>sp. nov.</b> from Yangjiang City, and both <i>M.ferrumequinum</i> <b>sp. nov.</b> and <i>M.wangjiani</i> <b>sp. nov.</b> from Maoming City. These four new species are all morphologically and genetically distinct from each other and the two known congeners <i>Megapleonumehuangzhang</i> Huang, Shih & Ahyong, 2018 and <i>Megapleonumshenzhen</i> Huang & Mao, 2021. The extremely divergent morphology of the gonopod 1 of these species alone immediately sets them apart, but there are also distinct differences in other characters, including the carapace, ambulatory leg, and maxilliped 3 exopod flagellum. A phylogeny constructed using the mitochondrial 16S rDNA reveals that all species of <i>Megapleonum</i> form a deep-rooted monophyletic group with significant interspecific genetic distances, supporting the generic placement and specific treatments of these new taxa. A key to the species of <i>Megapleonum</i> is also provided.</p>","PeriodicalId":24051,"journal":{"name":"ZooKeys","volume":"1244 ","pages":"1-27"},"PeriodicalIF":1.3000,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12242232/pdf/","citationCount":"0","resultStr":"{\"title\":\"Four new freshwater crab species of the genus <i>Megapleonum</i> Huang, Shih & Ahyong, 2018 (Crustacea, Decapoda, Potamidae) from Guangdong, China.\",\"authors\":\"Chao Huang, Hsi-Te Shih, Shane T Ahyong\",\"doi\":\"10.3897/zookeys.1244.148112\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Four new species of the poorly known genus <i>Megapleonum</i> Huang, Shih & Ahyong, 2018, are described from Guangdong Province, China: <i>Megapleonumfalx</i> <b>sp. nov.</b> from Huizhou City, <i>M.yangdongense</i> <b>sp. nov.</b> from Yangjiang City, and both <i>M.ferrumequinum</i> <b>sp. nov.</b> and <i>M.wangjiani</i> <b>sp. nov.</b> from Maoming City. These four new species are all morphologically and genetically distinct from each other and the two known congeners <i>Megapleonumehuangzhang</i> Huang, Shih & Ahyong, 2018 and <i>Megapleonumshenzhen</i> Huang & Mao, 2021. The extremely divergent morphology of the gonopod 1 of these species alone immediately sets them apart, but there are also distinct differences in other characters, including the carapace, ambulatory leg, and maxilliped 3 exopod flagellum. A phylogeny constructed using the mitochondrial 16S rDNA reveals that all species of <i>Megapleonum</i> form a deep-rooted monophyletic group with significant interspecific genetic distances, supporting the generic placement and specific treatments of these new taxa. A key to the species of <i>Megapleonum</i> is also provided.</p>\",\"PeriodicalId\":24051,\"journal\":{\"name\":\"ZooKeys\",\"volume\":\"1244 \",\"pages\":\"1-27\"},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2025-07-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12242232/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ZooKeys\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.3897/zookeys.1244.148112\",\"RegionNum\":3,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/1/1 0:00:00\",\"PubModel\":\"eCollection\",\"JCR\":\"Q2\",\"JCRName\":\"ZOOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ZooKeys","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.3897/zookeys.1244.148112","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/1 0:00:00","PubModel":"eCollection","JCR":"Q2","JCRName":"ZOOLOGY","Score":null,"Total":0}
Four new freshwater crab species of the genus Megapleonum Huang, Shih & Ahyong, 2018 (Crustacea, Decapoda, Potamidae) from Guangdong, China.
Four new species of the poorly known genus Megapleonum Huang, Shih & Ahyong, 2018, are described from Guangdong Province, China: Megapleonumfalxsp. nov. from Huizhou City, M.yangdongensesp. nov. from Yangjiang City, and both M.ferrumequinumsp. nov. and M.wangjianisp. nov. from Maoming City. These four new species are all morphologically and genetically distinct from each other and the two known congeners Megapleonumehuangzhang Huang, Shih & Ahyong, 2018 and Megapleonumshenzhen Huang & Mao, 2021. The extremely divergent morphology of the gonopod 1 of these species alone immediately sets them apart, but there are also distinct differences in other characters, including the carapace, ambulatory leg, and maxilliped 3 exopod flagellum. A phylogeny constructed using the mitochondrial 16S rDNA reveals that all species of Megapleonum form a deep-rooted monophyletic group with significant interspecific genetic distances, supporting the generic placement and specific treatments of these new taxa. A key to the species of Megapleonum is also provided.
期刊介绍：
ZooKeys is a peer-reviewed, open-access, online and print, rapidly produced journal launched to support free exchange of ideas and information in systematic zoology, phylogeny and biogeography.
All papers can be freely copied, downloaded, printed and distributed at no charge. Authors and readers are thus encouraged to post the pdf files of published papers on homepages or elsewhere to expedite distribution. There is no charge for color.
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