{"title":"A New Species of Free-living Marine Nematode (<i>Ptycholaimellus</i>: Chromadoridae: Chromadorida: Nematoda) from Mangrove Wetlands in China.","authors":"Yi-Jia Shih, Yu-Zhen Chen, Yu-Qing Guo","doi":"10.6620/ZS.2022.61-20","DOIUrl":null,"url":null,"abstract":"<p><p>This study presents a new species of free-living marine nematode, <i>Ptycholaimellus luoyang</i> sp. nov., from mangrove wetlands in China. The identification was confirmed by analyzing morphological characteristics and three genes: <i>COI</i>, 18S rDNA, and 28S rDNA. This species is distinguished from allied species by its short cephalic setae, cylindrical pharynx with anterior swelling, sclerotized transverse ridges occurring near the dorsal tooth, rod-like gubernaculum and proximal, arch-like, slightly waved, middle curved, and distally pointed spicules. The Bayesian topology was regarded as morphological evidence of <i>P. luoyang</i> sp. nov. being a distinct species. Interspecific and intrageneric thresholds of the K2P distance divergence have been presented here for the first time.</p>","PeriodicalId":49331,"journal":{"name":"Zoological Studies","volume":" ","pages":"e20"},"PeriodicalIF":1.4000,"publicationDate":"2022-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9579946/pdf/zoolstud-61-020.pdf","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Zoological Studies","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.6620/ZS.2022.61-20","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2022/1/1 0:00:00","PubModel":"eCollection","JCR":"Q2","JCRName":"ZOOLOGY","Score":null,"Total":0}
引用次数: 1
Abstract
This study presents a new species of free-living marine nematode, Ptycholaimellus luoyang sp. nov., from mangrove wetlands in China. The identification was confirmed by analyzing morphological characteristics and three genes: COI, 18S rDNA, and 28S rDNA. This species is distinguished from allied species by its short cephalic setae, cylindrical pharynx with anterior swelling, sclerotized transverse ridges occurring near the dorsal tooth, rod-like gubernaculum and proximal, arch-like, slightly waved, middle curved, and distally pointed spicules. The Bayesian topology was regarded as morphological evidence of P. luoyang sp. nov. being a distinct species. Interspecific and intrageneric thresholds of the K2P distance divergence have been presented here for the first time.
期刊介绍：
Zoological Studies publishes original research papers in five major fields: Animal Behavior, Comparative Physiology, Evolution, Ecology, and Systematics and Biogeography. Manuscripts are welcome from around the world and must be written in English. When the manuscript concerns the use of animals or specimens in research, a statement must be included to the effect that the author(s) has adhered to the legal requirements of the country in which the work was carried out or to any institutional guidelines.
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