{"title":"Free-living marine nematodes of the genus Richtersia Steiner, 1916 (Desmodorida: Richtersiidae) from the Sea of Japan.","authors":"Tatiana N Revkova, Nelli G Sergeeva","doi":"10.11646/zootaxa.5543.1.7","DOIUrl":null,"url":null,"abstract":"<p><p>Two new species Richtersia japonica sp. nov. and Richtersia amurica sp. nov. are described from the shallow water of the Sea of Japan. Both new species are characterized by the presence of multispiral amphidial fovea 3.5 turns in males and one turn in females; two unequal spicules and gubernaculum with anterior apophyses. R. japonica sp. nov. is most similar to R. beibuwanensis Fu, Cai, Boucher, Cao & Wu, 2013 and R. staresensis Soetaert & Vincx, 1987 in having arrangement of longitudinal rows of spines and presence of anterior apophyses on gubernaculum, but differs from them by the length of the spicules and in de Man a value in males. R. amurica sp. nov. is most similar to R. coomansi Soetaert & Vincx, 1987 and R. inaequalis Riemann, 1966 in having arrangement of longitudinal spine rows beginning at the level of the amphidial fovea and in long hairy spines on the tail of females. But it differs from them by presence of anterior apophyses on gubernaculum and length of the spicules. Data on the geographic and bathymetric distribution of all valid Richtersia species are provided.</p>","PeriodicalId":24072,"journal":{"name":"Zootaxa","volume":"5543 1","pages":"123-134"},"PeriodicalIF":0.8000,"publicationDate":"2024-12-02","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.5543.1.7","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
Two new species Richtersia japonica sp. nov. and Richtersia amurica sp. nov. are described from the shallow water of the Sea of Japan. Both new species are characterized by the presence of multispiral amphidial fovea 3.5 turns in males and one turn in females; two unequal spicules and gubernaculum with anterior apophyses. R. japonica sp. nov. is most similar to R. beibuwanensis Fu, Cai, Boucher, Cao & Wu, 2013 and R. staresensis Soetaert & Vincx, 1987 in having arrangement of longitudinal rows of spines and presence of anterior apophyses on gubernaculum, but differs from them by the length of the spicules and in de Man a value in males. R. amurica sp. nov. is most similar to R. coomansi Soetaert & Vincx, 1987 and R. inaequalis Riemann, 1966 in having arrangement of longitudinal spine rows beginning at the level of the amphidial fovea and in long hairy spines on the tail of females. But it differs from them by presence of anterior apophyses on gubernaculum and length of the spicules. Data on the geographic and bathymetric distribution of all valid Richtersia species are provided.
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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