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Comparison of the cryptic nematode species Caenorhabditis brenneri sp. n. and C. remanei (Nematoda: Rhabditidae) with the stem species pattern of  the Caenorhabditis Elegans group | Zootaxa

<!DOCTYPE html> <html lang="en-US" xml:lang="en-US"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title> Comparison of the cryptic nematode species Caenorhabditis brenneri sp. n. and C. remanei (Nematoda: Rhabditidae) with the stem species pattern of  the Caenorhabditis Elegans group | Zootaxa </title> <meta name="generator" content="Open Journal Systems 3.3.0.6"> <link rel="schema.DC" href="http://purl.org/dc/elements/1.1/" /> <meta name="DC.Creator.PersonalName" content="WALTER SUDHAUS"/> <meta name="DC.Creator.PersonalName" content="KARIN KIONTKE"/> <meta name="DC.Date.created" scheme="ISO8601" content="2007-04-25"/> <meta name="DC.Date.dateSubmitted" scheme="ISO8601" content="2015-12-23"/> <meta name="DC.Date.issued" scheme="ISO8601" content="2007-04-25"/> <meta name="DC.Date.modified" scheme="ISO8601" content="2019-06-18"/> <meta name="DC.Description" xml:lang="en" content="The new gonochoristic member of the Caenorhabditis Elegans group, C. brenneri sp. n., is described. This species is reproductively isolated at the postmating level from its sibling species, C. remanei. Between these species, only minute morphological differences are found, but there are substantial genetic differences. The stem species pattern of the Elegans group is reconstructed. C. brenneri sp. n. deviates from this character pattern only in small diagnostic characters. In mating tests of C. brenneri sp. n. females with C. remanei males, fertilization takes place and juveniles occasionally hatch. In the reverse combination, no offspring were observed. Individuals from widely separated populations of each species can be crossed successfully (e.g. C. brenneri sp. n. populations from Guadeloupe and Sumatra, or C. remanei populations from Japan and Germany). Both species have been isolated only from anthropogenic habitats, rich in decomposing organic material. C. brenneri sp. n. is distributed circumtropically, C. remanei is only found in northern temperate regions. To date, no overlap of the ranges was found. Hypotheses to explain the allopatric distribution of the two species are discussed. One suggests that the speciation center for the Elegans group was in East Asia, and globally distributed members dispersed from there."/> <meta name="DC.Format" scheme="IMT" content="application/pdf"/> <meta name="DC.Identifier" content="zootaxa.1456.1.2"/> <meta name="DC.Identifier.pageNumber" content="45–62"/> <meta name="DC.Identifier.DOI" content="10.11646/zootaxa.1456.1.2"/> <meta name="DC.Identifier.URI" content="https://mapress.com/zt/article/view/zootaxa.1456.1.2"/> <meta name="DC.Language" scheme="ISO639-1" content="en"/> <meta name="DC.Rights" content="Copyright (c) 2015 Zootaxa"/> <meta name="DC.Rights" content=""/> <meta name="DC.Source" content="Zootaxa"/> <meta name="DC.Source.ISSN" content="1175-5334"/> <meta name="DC.Source.Issue" content="1"/> <meta name="DC.Source.Volume" content="1456"/> <meta name="DC.Source.URI" content="https://mapress.com/zt"/> <meta name="DC.Subject" xml:lang="en" content="stem species pattern"/> <meta name="DC.Title" content="&lt;p&gt;&lt;strong&gt;Comparison of the cryptic nematode species &lt;em&gt;Caenorhabditis brenneri &lt;/em&gt;sp. n. and &lt;em&gt;C. remanei &lt;/em&gt;(Nematoda: Rhabditidae) with the stem species pattern of  the&lt;em&gt; Caenorhabditis Elegans&lt;/em&gt; group&lt;/strong&gt;&lt;/p&gt;"/> <meta name="DC.Type" content="Text.Serial.Journal"/> <meta name="DC.Type.articleType" content="Articles"/> <meta name="gs_meta_revision" content="1.1"/> <meta name="citation_journal_title" content="Zootaxa"/> <meta name="citation_journal_abbrev" content="Zootaxa"/> <meta name="citation_issn" content="1175-5334"/> <meta name="citation_author" content="WALTER SUDHAUS"/> <meta name="citation_author_institution" content="Institut für Biologie/Zoologie, AG Evolutionsbiologie, Freie Universität Berlin, Königin-Luise Straße 1-3, 14195 Berlin, Germany"/> <meta name="citation_author" content="KARIN KIONTKE"/> <meta name="citation_author_institution" content="Department of Biology, New York University, 100 Washington Square E., New York, NY10003, USA"/> <meta name="citation_title" content="&lt;p&gt;&lt;strong&gt;Comparison of the cryptic nematode species &lt;em&gt;Caenorhabditis brenneri &lt;/em&gt;sp. n. and &lt;em&gt;C. remanei &lt;/em&gt;(Nematoda: Rhabditidae) with the stem species pattern of  the&lt;em&gt; Caenorhabditis Elegans&lt;/em&gt; group&lt;/strong&gt;&lt;/p&gt;"/> <meta name="citation_language" content="en"/> <meta name="citation_date" content="2007/04/25"/> <meta name="citation_volume" content="1456"/> <meta name="citation_issue" content="1"/> <meta name="citation_firstpage" content="45–62"/> <meta name="citation_lastpage" content="45–62"/> <meta name="citation_doi" content="10.11646/zootaxa.1456.1.2"/> <meta name="citation_abstract_html_url" content="https://mapress.com/zt/article/view/zootaxa.1456.1.2"/> <meta name="citation_keywords" xml:lang="en" content="Nematoda"/> <meta name="citation_keywords" xml:lang="en" content="Caenorhabditis"/> <meta name="citation_keywords" xml:lang="en" content="biogeography"/> <meta name="citation_keywords" xml:lang="en" content="biological species concept"/> <meta name="citation_keywords" xml:lang="en" content="circumtropical"/> <meta name="citation_keywords" xml:lang="en" content="mating tests"/> <meta name="citation_keywords" xml:lang="en" content="remanei"/> <meta name="citation_keywords" xml:lang="en" content="stem species pattern"/> <meta name="citation_pdf_url" content="https://mapress.com/zt/article/download/zootaxa.1456.1.2/26727"/> <meta name="citation_reference" content="&lt;p class=&quot;HeadingRunIn&quot;&gt;Andrássy, I. 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(1996) Rte-1, a retrotransposon-like element in &lt;em&gt;Caenorhabditis elegans&lt;/em&gt;. &lt;em&gt;FEBS Letters&lt;/em&gt;, 380, 1–7.&lt;/p&gt;"/> <link rel="alternate" type="application/atom+xml" href="https://mapress.com/zt/gateway/plugin/WebFeedGatewayPlugin/atom"> <link rel="alternate" type="application/rdf+xml" href="https://mapress.com/zt/gateway/plugin/WebFeedGatewayPlugin/rss"> <link rel="alternate" type="application/rss+xml" href="https://mapress.com/zt/gateway/plugin/WebFeedGatewayPlugin/rss2"> <link rel="stylesheet" href="https://mapress.com/plugins/themes/oldGregg/resources/bootstrap/css/bootstrap.min.css?v=3.3.0.6" type="text/css" /><link rel="stylesheet" href="https://mapress.com/zt/$$$call$$$/page/page/css?name=less" type="text/css" /><link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Lora:400,400i,700,700i&display=swap&subset=cyrillic,vietnamese" rel="stylesheet//fonts.googleapis.com/css?family=Lora" type="text/css" /><link rel="stylesheet" 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dropdown-item" href="https://mapress.com/zt/Acanthocephala"> Acanthocephala-Editors </a> </div> </li> </ul> </div> </nav> </div> </div> </header> <main> <div class="jatsParser__container"> <div class="jatsParser__meta"> <div class="jatsParser__meta-row"> <div class="jatsParser__meta-section-title"> <span>Issue: <a href="https://mapress.com/zt/issue/view/zootaxa.1456.1"> Vol. 1456 No. 1: 25 Apr. 2007 </a> </span> </div> <div class="jatsParser__meta-section-title"> <span>Type: Articles</span> </div> <div class="jatsParser__meta-date-published"> <span>Published:<span> <span>2007-04-25</span> </div> <div class="jatsParser__meta-doi"> <span class="jatsParser__doi-label"> DOI: </span> <span class="jatsParser__meta-doi-value"> <a href="https://doi.org/10.11646/zootaxa.1456.1.2"> 10.11646/zootaxa.1456.1.2 </a> </span> </div> <div class="pages"> <span>Page range:</span> 45–62 </div> <div class="views"> <span>Abstract views:</span> 200 </div> <div class="views"> <span>PDF downloaded:</span> 52 </div> </div> <h1 class="jatsParser__meta-title"><p><strong>Comparison of the cryptic nematode species <em>Caenorhabditis brenneri </em>sp. n. and <em>C. remanei </em>(Nematoda: Rhabditidae) with the stem species pattern of  the<em> Caenorhabditis Elegans</em> group</strong></p></h1> <ul class="jatsParser__meta-authors"> <li><a class="jatsParser__meta-author-string-href" href="#author-1"><span class="jatsParser__meta-author">WALTER SUDHAUS</span><sup class="jatsParser__meta-symbol jatsParser__symbol-plus">+</sup><sup class="jatsParser__meta-symbol jatsParser__symbol-minus jatsParser__hide">&minus;</sup></a></li> <li><a class="jatsParser__meta-author-string-href" href="#author-2"><span class="jatsParser__meta-author">KARIN KIONTKE</span><sup class="jatsParser__meta-symbol jatsParser__symbol-plus">+</sup><sup class="jatsParser__meta-symbol jatsParser__symbol-minus jatsParser__hide">&minus;</sup></a></li> </ul> <div class="jatsParser__details-authors"> <div class="jatsParser__details-author jatsParser__hideAuthor" id="jatsParser__author-1"> <div class="jatsParser__details-author-affiliation">Institut für Biologie/Zoologie, AG Evolutionsbiologie, Freie Universität Berlin, Königin-Luise Straße 1-3, 14195 Berlin, Germany</div> </div> <div class="jatsParser__details-author jatsParser__hideAuthor" id="jatsParser__author-2"> <div class="jatsParser__details-author-affiliation">Department of Biology, New York University, 100 Washington Square E., New York, NY10003, USA</div> </div> </div> <div class="jatsParser__keywords-wrapper"> <div class="jatsParser__keywords-row"> <span class="jatsParser__keyword">Nematoda</span> <span class="jatsParser__keyword">Caenorhabditis</span> <span class="jatsParser__keyword">biogeography</span> <span class="jatsParser__keyword">biological species concept</span> <span class="jatsParser__keyword">circumtropical</span> <span class="jatsParser__keyword">mating tests</span> <span class="jatsParser__keyword">remanei</span> <span class="jatsParser__keyword">stem species pattern</span> </div> </div> </div> <div class="jatsParser__articleView"> <div class="jatsParser__left-article-block"> <div class="article-page__galleys"> <ul class="list-galleys primary-galleys"> <li> <a class="obj_galley_link pdf" href="https://mapress.com/zt/article/view/zootaxa.1456.1.2/26727"> PDF (1MB) </a> </li> </ul> </div> </div> <div class="jatsParser__center-article-block"> <div class="jatsParser__article-fulltext" id="jatsParserFullText"> <h2 class="article-section-title jatsParser__abstract">Abstract</h2> The new gonochoristic member of the <em>Caenorhabditis</em> <em>Elegans</em> group, <em>C.</em> <em>brenneri</em> sp. n., is described. This species is reproductively isolated at the postmating level from its sibling species, <em>C.</em> <em>remanei.</em> Between these species, only minute morphological differences are found, but there are substantial genetic differences. The stem species pattern of the <em>Elegans</em> group is reconstructed. <em>C.</em> <em>brenneri</em> sp. n. deviates from this character pattern only in small diagnostic characters. In mating tests of <em>C.</em> <em>brenneri</em> sp. n. females with <em>C.</em> <em>remanei</em> males, fertilization takes place and juveniles occasionally hatch. In the reverse combination, no offspring were observed. Individuals from widely separated populations of each species can be crossed successfully (e.g. <em>C.</em> <em>brenneri</em> sp. n. populations from Guadeloupe and Sumatra, or <em>C.</em> <em>remanei</em> populations from Japan and Germany). Both species have been isolated only from anthropogenic habitats, rich in decomposing organic material. <em>C.</em> <em>brenneri</em> sp. n. is distributed circumtropically, <em>C.</em> <em>remanei</em> is only found in northern temperate regions. To date, no overlap of the ranges was found. Hypotheses to explain the allopatric distribution of the two species are discussed. One suggests that the speciation center for the <em>Elegans</em> group was in East Asia, and globally distributed members dispersed from there. <h2 class="article-section-title jatsParser__references">References</h2> <ol class="jatsParser__references-list"> <li><p>Andrássy, I. (2005) Free-living nematodes from Hungary (Nematoda errantia), I. <em>Pedozoologica Hungarica</em> 3. Hungarian Natural History Museum and Systematic Zoology Research Group of the Hungarian Academy of Sciences, Budapest, 518 pp.</p><p>Baird, S.E. (1999) Natural and experimental associations of <em>Caenorhabditis remane</em>i with <em>Trachelipus rathkii</em> and other terrestrial isopods. <em>Nematology</em>, 1, 471–475.</p><p>Baird, S.E., Fitch, D.H.A. &amp; Emmons, S.W. (1994) <em>Caenorhabditis vulgaris</em> n. sp. (Nematoda: Rhabditidae): a necromenic associate of pill bugs and snails. <em>Nematologica</em>, 40, 1–11.</p><p>Baird, S.E., Sutherlin, M.E., Fitch, D.H.A. &amp; Emmons, S.W. (1990) Strange bedfellows. <em>Worm Breeder's Gazette,</em> 11 (4), 89.</p><p>Baird, S.E., Sutherlin, M.E. &amp; Emmons, S.W. (1992) Reproductive isolation in Rhabditidae (Nematoda: Secernentea): mechanisms that isolate six species of three genera. <em>Evolution</em>, 46, 585–594.</p><p>Baird, S.E. &amp; Yen, W.C. (2000) Reproductive isolation in <em>Caenorhabditis</em>: terminal phenotypes of hybrid embryos. <em>Evolution &amp; Development</em>, 2, 9–15.</p><p>Binder, B.F., Demilo, A.B., Kochansky, J.P.J. &amp; Chitwood, D. 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