{"title":"Unveiling novel and known Cryptaphelenchus species from China and USA","authors":"Jianfeng Gu, P. Castillo, Xinxin Ma, M. Munawar","doi":"10.1163/15685411-bja10335","DOIUrl":null,"url":null,"abstract":"\nCryptaphelenchus species are wood- or bark-inhabiting nematodes, generally mycetophagous and reported to have endophoretic associations with insects. In the present study, we describe two new and one known Cryptaphelenchus species detected in imported and domestic wood samples. Cryptaphelenchus americanum n. sp. and C. minutus were detected in the log samples of Pinus taeda imported from the USA, whereas C. orientalis n. sp. was isolated from the bark of dying Pinus sylvestris trees in Inner Mongolia, China. Both new species displayed characteristic features, including a relatively short body length, four lateral lines, a short post-vulval uterine sac in females, and a distinct cloacal apophysis in male tails. Newly recovered and known species were characterised molecularly, and phylogenetic trees were constructed to study their relationship with related Cryptaphelenchus species. Notably, the genetic divergence observed among Cryptaphelenchus species was found to be more significant compared to morphometrical differences, highlighting the importance of molecular data in taxonomy. The identification of new and known species expands our understanding of the genus and suggests that Cryptaphelenchus species may be under studied, underscoring the necessity for continued exploration.","PeriodicalId":18928,"journal":{"name":"Nematology","volume":null,"pages":null},"PeriodicalIF":1.2000,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nematology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1163/15685411-bja10335","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ZOOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Cryptaphelenchus species are wood- or bark-inhabiting nematodes, generally mycetophagous and reported to have endophoretic associations with insects. In the present study, we describe two new and one known Cryptaphelenchus species detected in imported and domestic wood samples. Cryptaphelenchus americanum n. sp. and C. minutus were detected in the log samples of Pinus taeda imported from the USA, whereas C. orientalis n. sp. was isolated from the bark of dying Pinus sylvestris trees in Inner Mongolia, China. Both new species displayed characteristic features, including a relatively short body length, four lateral lines, a short post-vulval uterine sac in females, and a distinct cloacal apophysis in male tails. Newly recovered and known species were characterised molecularly, and phylogenetic trees were constructed to study their relationship with related Cryptaphelenchus species. Notably, the genetic divergence observed among Cryptaphelenchus species was found to be more significant compared to morphometrical differences, highlighting the importance of molecular data in taxonomy. The identification of new and known species expands our understanding of the genus and suggests that Cryptaphelenchus species may be under studied, underscoring the necessity for continued exploration.
隐翅虫是栖息在木材或树皮中的线虫,通常噬菌,据报道与昆虫有内吸性联系。在本研究中,我们描述了在进口和国产木材样本中检测到的两种新的隐翅虫和一种已知的隐翅虫。从美国进口的太田松原木样本中检测到了美国隐翅虫(Cryptaphelenchus americanum n. sp.)和小隐翅虫(C. minutus),而从中国内蒙古濒死松树树皮中分离到了东方隐翅虫(C. orientalis n. sp.)。这两个新种都具有一些特征,包括相对较短的体长、四条侧线、雌性卵裂后子宫囊较短、雄性尾部有明显的泄殖腔骨突。对新发现的物种和已知物种进行了分子鉴定,并构建了系统发生树,以研究它们与相关隐翅虫物种的关系。值得注意的是,与形态差异相比,在隐翅虫物种之间观察到的遗传差异更为显著,这凸显了分子数据在分类学中的重要性。新种和已知种的鉴定扩大了我们对隐翅虫属的了解,并表明隐翅虫属的物种可能还未得到充分研究,强调了继续探索的必要性。
期刊介绍:
Nematology is an international journal for the publication of all aspects of nematological research (with the exception of vertebrate parasitology), from molecular biology to field studies. Papers on nematode parasites of arthropods, and on soil free-living nematodes, and on interactions of these and other organisms, are particularly welcome. Research on fresh water and marine nematodes is also considered when the observations are of more general interest.
Nematology publishes full research papers, short communications, Forum articles (which permit an author to express a view on current or fundamental subjects), perspectives on nematology, and reviews of books and other media.