{"title":"分子系统进化揭示印度支那新的淡水蛏属 Cenonovaculina gen.","authors":"Ekgachai Jeratthitikul, Chirasak Sutcharit","doi":"10.1071/is24024","DOIUrl":null,"url":null,"abstract":"<p>The razor clam genus <i>Novaculina</i> is a secondary marine-derived freshwater taxa within the otherwise exclusively marine family Pharidae. <i>Novaculina</i> currently comprises four valid species that are distributed allopatrically across several drainages in Asia. We employed an integrated approach, combining morphology and molecular phylogenetic analyses to elucidate the taxonomic placement of members within this genus. The multi-locus phylogenetic trees based on cytochrome <i>c</i> oxidase subunit <i>I</i> (<i>COI</i>), <i>16S</i> rRNA and <i>28S</i> rRNA gene sequences demonstrate that <i>Novaculina</i> is polyphyletic. Specimens identified as <i>N. siamensis</i> form a distinct clade that is not sister group to other currently recognised congeners. Furthermore, morphological examination reveals distinct characteristics in ‘<i>N. siamensis</i>’, namely a fused, fringed siphon, in contrast to the separated, smooth siphons observed in other species. Based on these findings, we propose the establishment of a new genus, <i>Cenonovaculina</i> gen. nov., to accommodate ‘<i>N. siamensis</i>’. The new genus is distinguished from other genera in having a short shell, deep pallial sinus, elongate, oval to bean-shaped anterior adductor scar and long fused siphons surrounded by conical tentacles.</p><p>ZooBank: urn:lsid:zoobank.org:pub:6E16FC43-5BBA-4791-A805-1C84859877A3</p>","PeriodicalId":54927,"journal":{"name":"Invertebrate Systematics","volume":"14 1","pages":""},"PeriodicalIF":1.8000,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Molecular phylogeny reveals Cenonovaculina gen. nov. (Adapedonta: Pharidae), a new freshwater razor clam genus from Indochina\",\"authors\":\"Ekgachai Jeratthitikul, Chirasak Sutcharit\",\"doi\":\"10.1071/is24024\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The razor clam genus <i>Novaculina</i> is a secondary marine-derived freshwater taxa within the otherwise exclusively marine family Pharidae. <i>Novaculina</i> currently comprises four valid species that are distributed allopatrically across several drainages in Asia. We employed an integrated approach, combining morphology and molecular phylogenetic analyses to elucidate the taxonomic placement of members within this genus. The multi-locus phylogenetic trees based on cytochrome <i>c</i> oxidase subunit <i>I</i> (<i>COI</i>), <i>16S</i> rRNA and <i>28S</i> rRNA gene sequences demonstrate that <i>Novaculina</i> is polyphyletic. Specimens identified as <i>N. siamensis</i> form a distinct clade that is not sister group to other currently recognised congeners. Furthermore, morphological examination reveals distinct characteristics in ‘<i>N. siamensis</i>’, namely a fused, fringed siphon, in contrast to the separated, smooth siphons observed in other species. Based on these findings, we propose the establishment of a new genus, <i>Cenonovaculina</i> gen. nov., to accommodate ‘<i>N. siamensis</i>’. The new genus is distinguished from other genera in having a short shell, deep pallial sinus, elongate, oval to bean-shaped anterior adductor scar and long fused siphons surrounded by conical tentacles.</p><p>ZooBank: urn:lsid:zoobank.org:pub:6E16FC43-5BBA-4791-A805-1C84859877A3</p>\",\"PeriodicalId\":54927,\"journal\":{\"name\":\"Invertebrate Systematics\",\"volume\":\"14 1\",\"pages\":\"\"},\"PeriodicalIF\":1.8000,\"publicationDate\":\"2024-04-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Invertebrate Systematics\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1071/is24024\",\"RegionNum\":2,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"EVOLUTIONARY BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Invertebrate Systematics","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1071/is24024","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"EVOLUTIONARY BIOLOGY","Score":null,"Total":0}
Molecular phylogeny reveals Cenonovaculina gen. nov. (Adapedonta: Pharidae), a new freshwater razor clam genus from Indochina
The razor clam genus Novaculina is a secondary marine-derived freshwater taxa within the otherwise exclusively marine family Pharidae. Novaculina currently comprises four valid species that are distributed allopatrically across several drainages in Asia. We employed an integrated approach, combining morphology and molecular phylogenetic analyses to elucidate the taxonomic placement of members within this genus. The multi-locus phylogenetic trees based on cytochrome c oxidase subunit I (COI), 16S rRNA and 28S rRNA gene sequences demonstrate that Novaculina is polyphyletic. Specimens identified as N. siamensis form a distinct clade that is not sister group to other currently recognised congeners. Furthermore, morphological examination reveals distinct characteristics in ‘N. siamensis’, namely a fused, fringed siphon, in contrast to the separated, smooth siphons observed in other species. Based on these findings, we propose the establishment of a new genus, Cenonovaculina gen. nov., to accommodate ‘N. siamensis’. The new genus is distinguished from other genera in having a short shell, deep pallial sinus, elongate, oval to bean-shaped anterior adductor scar and long fused siphons surrounded by conical tentacles.
期刊介绍：
Invertebrate Systematics (formerly known as Invertebrate Taxonomy) is an international journal publishing original and significant contributions on the systematics, phylogeny and biogeography of all invertebrate taxa. Articles in the journal provide comprehensive treatments of clearly defined taxonomic groups, often emphasising their biodiversity patterns and/or biological aspects. The journal also includes contributions on the systematics of selected species that are of particular conservation, economic, medical or veterinary importance.
Invertebrate Systematics is a vital resource globally for scientists, students, conservation biologists, environmental consultants and government policy advisors who are interested in terrestrial, freshwater and marine systems.
Invertebrate Systematics is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
