{"refrec":{"BRefID":349820,"RR":"<b>Lo Russo, V.; Pastor de Ward, C.T.</b> (2021). Three new species of <i>Mesacanthion</i> Filipjev, 1927 (Nematoda: Thoracostomopsidae) from Argentine coasts. <i>Eur. J. Taxon. 787</i>: 17-31. <a href=\"https://dx.doi.org/10.5852/ejt.2021.787.1611\" target=\"_blank\">https://dx.doi.org/10.5852/ejt.2021.787.1611</a>","BEntID":347515,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Eur. J. Taxon. 787</i>: 17-31. <a href=\"https://dx.doi.org/10.5852/ejt.2021.787.1611\" target=\"_blank\">https://dx.doi.org/10.5852/ejt.2021.787.1611</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Lo Russo, V.; Pastor de Ward, C.T.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Lo Russo, V.; Pastor de Ward, C.T.","Englishabstract":"Three new species of <em>Mesacanthion</em> Filipjev, 1927 were found along Patagonian coasts (Argentina). <em>Mesacanthion bifidum</em> sp.&nbsp;nov. is characterized by short labial and cephalic setae, onchia of equal size, spicule arcuate, and gubernaculum with caudal apophysis, ending in two teeth. The species is related to <em>M.&nbsp;virile</em> (Ditlevsen, 1930) De Coninck &amp; Schuurmans Stekhoven, 1933. However, the spicules and gubernaculum of both species are different in shape. <em>Mesacanthion longigubernaculum</em> sp.&nbsp;nov. is characterized by its long and slender body, striated cuticle, relatively long cephalic and cervical setae, onchia of different sizes, amphidial fovea lentil-shaped, spicule arcuate, gubernaculum surrounding the spicule, and tail conical-cylindrical with terminal setae. <em>Mesacanthion sanantoniensis</em> sp.&nbsp;nov. is characterized by its long and stout body, striated cuticle, long cephalic setae, onchia of different sizes, amphidial fovea pouch-shaped, spicule arcuate, gubernaculum with dorsal apophysis, and tail conical without terminal setae. Following the key of Jeong <em>et&nbsp;al.</em> (2019), the last two species are related to <em>M.&nbsp;pali </em>Wieser, 1959 and <em>M.&nbsp;longissimesetosum</em> Wieser, 1953, so we provide a key to differentiate the four species.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Three new species of <i>Mesacanthion</i> Filipjev, 1927 (Nematoda: Thoracostomopsidae) from Argentine coasts","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-12 01:32:07.578265","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"free-living marine nematodes, diversity, taxonomy, Patagonia, coastal area","OtherDescriptors":null,"Notes":null,"AnaPub":2021,"MonPub":null,"DateUpdate":"2022-02-17","DateCreate":"2022-02-17","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000744169600001","VABBcode":null,"OpenAcc":1,"DOI":"10.5852/ejt.2021.787.1611"},"refs":null,"anarec":{"AnaID":349820,"PubliDate":2021,"Pagination":"17-31","XtraPublOfAnaID":null,"ISBN":null,"Volume":"787","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":215336,"SerRR":"European Journal of Taxonomy. Muséum national d'Histoire naturelle: Paris.  ISSN 2118-9773; e-ISSN 2118-9773","StandardTitleSer":"European Journal of Taxonomy","ISSN":"2118-9773","AbbrevSer":"Eur. J. 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