{"title":"Morphology of the egg-case and larva of Paracymus aeneus (Germar) (Coleoptera: Hydrophilidae).","authors":"Yûsuke N Minoshima, Kohei Watanabe","doi":"10.11646/zootaxa.5541.2.5","DOIUrl":null,"url":null,"abstract":"<p><p>The generic and species identity of previously described larva of Paracymus aeneus (Germar, 1824), the type species of the genus Paracymus Thomson, 1867, has been a subject of controversy owing to their morphological similarity to the genus Anacaena Thomson, 1859. In this study, we describe morphology of the egg-case and all three instar larvae of P. aeneus based on Japanese specimens obtained through rearing and provide the biological information on the species under rearing conditions. The morphology of the larvae corresponds with that of known Paracymus larvae rather than Anacaena. Consequently, larvae previously described as P. aeneus do not belong this species. Therefore, this is the first description of the immature stages of P. aeneus.</p>","PeriodicalId":24072,"journal":{"name":"Zootaxa","volume":"5541 2","pages":"200-214"},"PeriodicalIF":0.8000,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Zootaxa","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.11646/zootaxa.5541.2.5","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ZOOLOGY","Score":null,"Total":0}
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Abstract
The generic and species identity of previously described larva of Paracymus aeneus (Germar, 1824), the type species of the genus Paracymus Thomson, 1867, has been a subject of controversy owing to their morphological similarity to the genus Anacaena Thomson, 1859. In this study, we describe morphology of the egg-case and all three instar larvae of P. aeneus based on Japanese specimens obtained through rearing and provide the biological information on the species under rearing conditions. The morphology of the larvae corresponds with that of known Paracymus larvae rather than Anacaena. Consequently, larvae previously described as P. aeneus do not belong this species. Therefore, this is the first description of the immature stages of P. aeneus.
期刊介绍：
Zootaxa is a peer-reviewed international journal for rapid publication of high quality papers on any aspect of systematic zoology, with a preference for large taxonomic works such as monographs and revisions. Zootaxa considers papers on all animal taxa, both living and fossil, and especially encourages descriptions of new taxa. All types of taxonomic papers are considered, including theories and methods of systematics and phylogeny, taxonomic monographs, revisions and reviews, catalogues/checklists, biographies and bibliographies, identification guides, analysis of characters, phylogenetic relationships and zoogeographical patterns of distribution, descriptions of taxa, and nomenclature. Open access publishing option is strongly encouraged for authors with research grants and other funds. For those without grants/funds, all accepted manuscripts will be published but access is secured for subscribers only.
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