A new and a described species of Cystiphora (Diptera: Cecidomyiidae) from Japan, with reference to geographically diversified intraspecific populations of C. taraxaci and its host range expansion from native Japanese to alien and hybrid species of Taraxacum (Asteraceae)
{"title":"A new and a described species of Cystiphora (Diptera: Cecidomyiidae) from Japan, with reference to geographically diversified intraspecific populations of C. taraxaci and its host range expansion from native Japanese to alien and hybrid species of Taraxacum (Asteraceae)","authors":"Junichi Yukawa, Wanggyu Kim, Takako Nishino, Tsuneo Minami, Satoshi Yamauchi, Makoto Ogawa, Kenji Ohara","doi":"10.1111/ens.12480","DOIUrl":null,"url":null,"abstract":"<p>Two species of <i>Cystiphora</i> (Diptera: Cecidomyiidae) are newly recorded from Japan. A gall midge that induces leaf galls on <i>Taraxacum</i> species (Asteraceae) is identified as <i>Cystiphora taraxaci</i> (Kieffer). Another gall midge that is responsible for leaf galls on <i>Sonchus brachyotus</i> (Asteraceae) is described as a new species under the name <i>Cystiphora hachijounae</i> Yukawa and Kim based on its incised hypoproct of male terminalia and some of the pupal characteristics. Genetic analysis supported the species identifications and indicated that the Palearctic <i>C. taraxaci</i> has long existed in Japan. It has been diversifying geographically into intraspecific populations since at least 2.57 Ma. Our current study argues against the recent invasion of Japan by alien <i>C. taraxaci</i> at the time of multiple introductions of European <i>Taraxacum</i> species to Japan for use as food (seed oil), forage and greening material during the late 19th century. Genetic analysis of gall-bearing <i>Taraxacum</i> plants collected from various localities in Japan indicates that most of them were alien or hybrid plants, while native Japanese species were rare, and these plants exhibited polyploidy from 2x to 5x. <i>Cystiphora taraxaci</i> is considered to have expanded its host range from native Japanese to alien and hybrid species of <i>Taraxacum</i> without regard to polyploidy.</p>","PeriodicalId":11745,"journal":{"name":"Entomological Science","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2021-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/ens.12480","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Entomological Science","FirstCategoryId":"97","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/ens.12480","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENTOMOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Two species of Cystiphora (Diptera: Cecidomyiidae) are newly recorded from Japan. A gall midge that induces leaf galls on Taraxacum species (Asteraceae) is identified as Cystiphora taraxaci (Kieffer). Another gall midge that is responsible for leaf galls on Sonchus brachyotus (Asteraceae) is described as a new species under the name Cystiphora hachijounae Yukawa and Kim based on its incised hypoproct of male terminalia and some of the pupal characteristics. Genetic analysis supported the species identifications and indicated that the Palearctic C. taraxaci has long existed in Japan. It has been diversifying geographically into intraspecific populations since at least 2.57 Ma. Our current study argues against the recent invasion of Japan by alien C. taraxaci at the time of multiple introductions of European Taraxacum species to Japan for use as food (seed oil), forage and greening material during the late 19th century. Genetic analysis of gall-bearing Taraxacum plants collected from various localities in Japan indicates that most of them were alien or hybrid plants, while native Japanese species were rare, and these plants exhibited polyploidy from 2x to 5x. Cystiphora taraxaci is considered to have expanded its host range from native Japanese to alien and hybrid species of Taraxacum without regard to polyploidy.
期刊介绍:
Entomological Science is the official English language journal of the Entomological Society of Japan. The Journal publishes original research papers and reviews from any entomological discipline or from directly allied field in ecology, behavioral biology, physiology, biochemistry, development, genetics, systematics, morphology, evolution and general entomology. Papers of applied entomology will be considered for publication if they significantly advance in the field of entomological science in the opinion of the Editors and Editorial Board.