<?xml version="1.0" ?>
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<taxon doi="10.1601/tx.146" rank="genus" xmlns="http://namesforlife.com/ns/taxon">
  <nomenclature xmlns="http://namesforlife.com/ns/common">
    <name-status-group>
      <identifier doi="10.1601/nm.146" nomenclatural-type="10.1601/tx.147" nomenclatural-type-exemplar="10.1601/ex.147" rank="genus" taxon-doi="10.1601/tx.146">Methanococcus</identifier>
      <authority>Kluyver and van Niel 1936 (Approved Lists 1980) emend. Mah and Kuhn 1984</authority>
      <status candidatus="false" conserved="true" current-name="Methanococcus" current-name-doi="10.1601/nm.146" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
    </name-status-group>
  </nomenclature>
  <nomenclatural-type nomenclatural-type-exemplar="10.1601/ex.147" xmlns="http://namesforlife.com/ns/common">
    <name-status-group>
      <identifier doi="10.1601/nm.147" nomenclatural-type-exemplar="10.1601/ex.147" rank="species" taxon-doi="10.1601/tx.147">Methanococcus vannielii</identifier>
      <authority>Stadtman and Barker 1951 (Approved Lists 1980)</authority>
      <status candidatus="false" conserved="true" current-name="Methanococcus vannielii" current-name-doi="10.1601/nm.147" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
    </name-status-group>
  </nomenclatural-type>
  <taxonomic-equivalence>
    <related-taxon accession="2184" nomos="NCBI Taxonomy" rank="genus" relation="exactMatch" />
  </taxonomic-equivalence>
  <ancestor doi="10.1601/tx.0" rank="root">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.0" rank="root" taxon-doi="10.1601/tx.0">Universal Root</identifier>
        <authority>Woese et al. 1990</authority>
        <status candidatus="false" conserved="false" current-name="Universal Root" current-name-doi="10.1601/nm.0" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="NVP" />
      </name-status-group>
    </nomenclature>
    <ancestor doi="10.1601/tx.1" rank="domain">
      <nomenclature xmlns="http://namesforlife.com/ns/common">
        <name-status-group>
          <identifier doi="10.1601/nm.1" rank="domain" taxon-doi="10.1601/tx.1">Archaea</identifier>
          <authority>Woese et al. 1990</authority>
          <status candidatus="false" conserved="false" current-name="Archaea" current-name-doi="10.1601/nm.1" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="NVP" />
        </name-status-group>
      </nomenclature>
      <ancestor doi="10.1601/tx.90" rank="phylum">
        <nomenclature xmlns="http://namesforlife.com/ns/common">
          <name-status-group>
            <identifier doi="10.1601/nm.90" nomenclatural-type="10.1601/tx.94" nomenclatural-type-exemplar="10.1601/ex.95" rank="phylum" taxon-doi="10.1601/tx.90">Euryarchaeota</identifier>
            <authority>(sic) Garrity and Holt 2001</authority>
            <status candidatus="false" conserved="false" current-name="Methanobacteriota" current-name-doi="10.1601/nm.31627" illegitimate="false" is-current="false" rejected="false" revived="false" status-code="NVP" />
          </name-status-group>
          <name-status-group>
            <identifier doi="10.1601/nm.31627" nomenclatural-type="10.1601/tx.94" nomenclatural-type-exemplar="10.1601/ex.95" rank="phylum" taxon-doi="10.1601/tx.90">Methanobacteriota</identifier>
            <authority>corrig. Garrity and Holt 2001</authority>
            <status candidatus="false" conserved="false" current-name="Methanobacteriota" current-name-doi="10.1601/nm.31627" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="NVP" />
          </name-status-group>
        </nomenclature>
        <ancestor doi="10.1601/tx.143" rank="class">
          <nomenclature xmlns="http://namesforlife.com/ns/common">
            <name-status-group>
              <identifier doi="10.1601/nm.143" nomenclatural-type="10.1601/tx.144" nomenclatural-type-exemplar="10.1601/ex.147" rank="class" taxon-doi="10.1601/tx.143">Methanococci</identifier>
              <authority>Boone 2002</authority>
              <status candidatus="false" conserved="false" current-name="Methanococci" current-name-doi="10.1601/nm.143" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
            </name-status-group>
          </nomenclature>
          <ancestor doi="10.1601/tx.144" rank="order">
            <nomenclature xmlns="http://namesforlife.com/ns/common">
              <name-status-group>
                <identifier doi="10.1601/nm.144" nomenclatural-type="10.1601/tx.146" nomenclatural-type-exemplar="10.1601/ex.147" rank="order" taxon-doi="10.1601/tx.144">Methanococcales</identifier>
                <authority>Balch and Wolfe 1981</authority>
                <status candidatus="false" conserved="false" current-name="Methanococcales" current-name-doi="10.1601/nm.144" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
              </name-status-group>
            </nomenclature>
            <ancestor doi="10.1601/tx.145" rank="family">
              <nomenclature xmlns="http://namesforlife.com/ns/common">
                <name-status-group>
                  <identifier doi="10.1601/nm.145" nomenclatural-type="10.1601/tx.146" nomenclatural-type-exemplar="10.1601/ex.147" rank="family" taxon-doi="10.1601/tx.145">Methanococcaceae</identifier>
                  <authority>Balch and Wolfe 1981</authority>
                  <status candidatus="false" conserved="false" current-name="Methanococcaceae" current-name-doi="10.1601/nm.145" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
                </name-status-group>
              </nomenclature>
              <ancestor doi="10.1601/tx.146" rank="genus">
                <nomenclature xmlns="http://namesforlife.com/ns/common">
                  <name-status-group>
                    <identifier doi="10.1601/nm.146" nomenclatural-type="10.1601/tx.147" nomenclatural-type-exemplar="10.1601/ex.147" rank="genus" taxon-doi="10.1601/tx.146">Methanococcus</identifier>
                    <authority>Kluyver and van Niel 1936 (Approved Lists 1980) emend. Mah and Kuhn 1984</authority>
                    <status candidatus="false" conserved="true" current-name="Methanococcus" current-name-doi="10.1601/nm.146" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
                  </name-status-group>
                </nomenclature>
              </ancestor>
            </ancestor>
          </ancestor>
        </ancestor>
      </ancestor>
    </ancestor>
  </ancestor>
  <parent doi="10.1601/tx.145" rank="family">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.145" nomenclatural-type="10.1601/tx.146" nomenclatural-type-exemplar="10.1601/ex.147" rank="family" taxon-doi="10.1601/tx.145">Methanococcaceae</identifier>
        <authority>Balch and Wolfe 1981</authority>
        <status candidatus="false" conserved="false" current-name="Methanococcaceae" current-name-doi="10.1601/nm.145" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </parent>
  <sibling doi="10.1601/tx.160" rank="genus">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.160" nomenclatural-type="10.1601/tx.161" nomenclatural-type-exemplar="10.1601/ex.157" rank="genus" taxon-doi="10.1601/tx.160">Methanothermococcus</identifier>
        <authority>Whitman 2002</authority>
        <status candidatus="false" conserved="false" current-name="Methanothermococcus" current-name-doi="10.1601/nm.160" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </sibling>
  <sibling doi="10.1601/tx.34273" rank="genus">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.34273" nomenclatural-type="10.1601/tx.34274" nomenclatural-type-exemplar="10.1601/ex.34274" rank="genus" taxon-doi="10.1601/tx.34273">Methanofervidicoccus</identifier>
        <authority>Sakai et al. 2019</authority>
        <status candidatus="false" conserved="false" current-name="Methanofervidicoccus" current-name-doi="10.1601/nm.34273" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </sibling>
  <child doi="10.1601/tx.150" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.150" nomenclatural-type-exemplar="10.1601/ex.150" rank="species" taxon-doi="10.1601/tx.150">Methanococcus frisius</identifier>
        <authority>Blotevogel et al. 1986</authority>
        <status candidatus="false" conserved="false" current-name="Methanosarcina frisia" current-name-doi="10.1601/nm.232" illegitimate="false" is-current="false" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <child doi="10.1601/tx.158" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.158" nomenclatural-type-exemplar="10.1601/ex.158" rank="species" taxon-doi="10.1601/tx.158">Methanococcus voltae</identifier>
        <authority>Balch and Wolfe 1981 emend. Ward et al. 1989</authority>
        <status candidatus="false" conserved="false" current-name="Methanococcus voltae" current-name-doi="10.1601/nm.158" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <child doi="10.1601/tx.155" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.155" nomenclatural-type-exemplar="10.1601/ex.155" rank="species" taxon-doi="10.1601/tx.155">Methanococcus maripaludis</identifier>
        <authority>Jones et al. 1984</authority>
        <status candidatus="false" conserved="false" current-name="Methanococcus maripaludis" current-name-doi="10.1601/nm.155" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <child doi="10.1601/tx.157" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.157" nomenclatural-type-exemplar="10.1601/ex.157" rank="species" taxon-doi="10.1601/tx.157">Methanococcus thermolithotrophicus</identifier>
        <authority>Huber et al. 1984</authority>
        <status candidatus="false" conserved="false" current-name="Methanothermococcus thermolithotrophicus" current-name-doi="10.1601/nm.161" illegitimate="false" is-current="false" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <child doi="10.1601/tx.151" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.151" nomenclatural-type-exemplar="10.1601/ex.151" rank="species" taxon-doi="10.1601/tx.151">Methanococcus halophilus</identifier>
        <authority>Zhilina 1984</authority>
        <status candidatus="false" conserved="false" current-name="Methanohalophilus halophilus" current-name-doi="10.1601/nm.247" illegitimate="false" is-current="false" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <child doi="10.1601/tx.152" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.152" nomenclatural-type-exemplar="10.1601/ex.152" rank="species" taxon-doi="10.1601/tx.152">Methanococcus igneus</identifier>
        <authority>Burggraf et al. 1990</authority>
        <status candidatus="false" conserved="false" current-name="Methanotorris igneus" current-name-doi="10.1601/nm.171" illegitimate="false" is-current="false" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <child doi="10.1601/tx.154" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.154" nomenclatural-type-exemplar="10.1601/ex.154" rank="species" taxon-doi="10.1601/tx.154">Methanococcus jannaschii</identifier>
        <authority>Jones et al. 1984</authority>
        <status candidatus="false" conserved="false" current-name="Methanocaldococcus jannaschii" current-name-doi="10.1601/nm.168" illegitimate="false" is-current="false" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <child doi="10.1601/tx.156" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.156" nomenclatural-type-exemplar="10.1601/ex.156" rank="species" taxon-doi="10.1601/tx.156">Methanococcus mazei</identifier>
        <authority>Barker 1936 (Approved Lists 1980)</authority>
        <status candidatus="false" conserved="false" current-name="Methanosarcina mazei" current-name-doi="10.1601/nm.234" illegitimate="false" is-current="false" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <child doi="10.1601/tx.159" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.159" nomenclatural-type-exemplar="10.1601/ex.159" rank="species" taxon-doi="10.1601/tx.159">Methanococcus vulcanius</identifier>
        <authority>Jeanthon et al. 1999</authority>
        <status candidatus="false" conserved="false" current-name="Methanocaldococcus vulcanius" current-name-doi="10.1601/nm.169" illegitimate="false" is-current="false" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <child doi="10.1601/tx.148" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.148" nomenclatural-type-exemplar="10.1601/ex.148" rank="species" taxon-doi="10.1601/tx.148">Methanococcus deltae</identifier>
        <authority>Corder et al. 1988</authority>
        <status candidatus="false" conserved="false" current-name="Methanococcus deltae" current-name-doi="10.1601/nm.148" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <child doi="10.1601/tx.153" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.153" nomenclatural-type-exemplar="10.1601/ex.153" rank="species" taxon-doi="10.1601/tx.153">Methanococcus infernus</identifier>
        <authority>Jeanthon et al. 1998</authority>
        <status candidatus="false" conserved="false" current-name="Methanococcus infernus" current-name-doi="10.1601/nm.153" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <child doi="10.1601/tx.10137" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.10137" nomenclatural-type-exemplar="10.1601/ex.10137" rank="species" taxon-doi="10.1601/tx.10137">Methanococcus aeolicus</identifier>
        <authority>Kendall et al. 2006</authority>
        <status candidatus="false" conserved="false" current-name="Methanococcus aeolicus" current-name-doi="10.1601/nm.10137" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <child doi="10.1601/tx.149" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.149" nomenclatural-type-exemplar="10.1601/ex.149" rank="species" taxon-doi="10.1601/tx.149">Methanococcus fervens</identifier>
        <authority>Jeanthon et al. 1999</authority>
        <status candidatus="false" conserved="false" current-name="Methanocaldococcus fervens" current-name-doi="10.1601/nm.165" illegitimate="false" is-current="false" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <child doi="10.1601/tx.147" rank="species">
    <nomenclature xmlns="http://namesforlife.com/ns/common">
      <name-status-group>
        <identifier doi="10.1601/nm.147" nomenclatural-type-exemplar="10.1601/ex.147" rank="species" taxon-doi="10.1601/tx.147">Methanococcus vannielii</identifier>
        <authority>Stadtman and Barker 1951 (Approved Lists 1980)</authority>
        <status candidatus="false" conserved="true" current-name="Methanococcus vannielii" current-name-doi="10.1601/nm.147" illegitimate="false" is-current="true" rejected="false" revived="false" status-code="VP" />
      </name-status-group>
    </nomenclature>
  </child>
  <exemplars xmlns="http://namesforlife.com/ns/exemplar" />
  <bibliography xmlns="http://namesforlife.com/ns/reference">
    <reference id="rid.42">
      <citation citation-type="journal">
        <authors>
          <person-name>
            <surname>Barker</surname>
            <given-names>H.A.</given-names>
          </person-name>
        </authors>
        <article-title>Studies upon the methane-producing bacteria.</article-title>
        <year>1936</year>
        <volume>7</volume>
        <fpage>420</fpage>
        <lpage>438</lpage>
        <source id="746">Archiv für Mikrobiologie</source>
        <abbrev>Arch Mikrobiol</abbrev>
        <issn>0003-9276</issn>
      </citation>
    </reference>
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      <citation citation-type="journal">
        <authors>
          <person-name>
            <surname>Jones</surname>
            <given-names>W.J.</given-names>
          </person-name>
          <person-name>
            <surname>Leigh</surname>
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            <given-names>F.</given-names>
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            <surname>Woese</surname>
            <given-names>C.R.</given-names>
          </person-name>
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            <surname>Wolfe</surname>
            <given-names>R.S.</given-names>
          </person-name>
        </authors>
        <article-title>Methanococcus jannaschii sp. nov., an extremely thermophilic methanogen from a submarine hydrothermal vent.</article-title>
        <year>1983</year>
        <volume>136</volume>
        <fpage>254</fpage>
        <lpage>261</lpage>
        <source id="118">Archives of Microbiology</source>
        <abbrev>Arch Microbiol</abbrev>
        <issn>0302-8933</issn>
        <essn>1432-072X</essn>
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            <surname>Stadtman</surname>
            <given-names>T.C.</given-names>
          </person-name>
          <person-name>
            <surname>Barker</surname>
            <given-names>H.A.</given-names>
          </person-name>
        </authors>
        <article-title>Studies on the methane fermentation. A new formate-decomposing bacterium, Methanococcus vannielii.</article-title>
        <year>1951</year>
        <volume>62</volume>
        <fpage>269</fpage>
        <lpage>280</lpage>
        <source id="177">Journal of Bacteriology</source>
        <abbrev>J Bacteriol</abbrev>
        <issn>0021-9193</issn>
        <essn>1098-5530</essn>
        <pub-id pub-id-type="pmid">14888644</pub-id>
      </citation>
    </reference>
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        <authors>
          <person-name>
            <surname>Jeanthon</surname>
            <given-names>C.</given-names>
          </person-name>
          <person-name>
            <surname>L'Haridon</surname>
            <given-names>S.</given-names>
          </person-name>
          <person-name>
            <surname>Reysenbach</surname>
            <given-names>A.L.</given-names>
          </person-name>
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            <surname>Vernet</surname>
            <given-names>M.</given-names>
          </person-name>
          <person-name>
            <surname>Messner</surname>
            <given-names>P.</given-names>
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            <surname>Sleytr</surname>
            <given-names>U.B.</given-names>
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          <person-name>
            <surname>Prieur</surname>
            <given-names>D.</given-names>
          </person-name>
        </authors>
        <article-title>Methanococcus infernus sp. nov., a novel hyperthermophilic lithotrophic methanogen isolated from a deep-sea hydrothermal vent.</article-title>
        <year>1998</year>
        <volume>48</volume>
        <issue>3</issue>
        <fpage>913</fpage>
        <lpage>919</lpage>
        <source id="116">International Journal of Systematic Bacteriology</source>
        <abbrev>Int J Syst Bacteriol</abbrev>
        <issn>0020-7713</issn>
        <pub-id pub-id-type="doi">10.1099/00207713-48-3-913</pub-id>
        <pub-id pub-id-type="pmid">9734046</pub-id>
      </citation>
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            <surname>Zhilina</surname>
            <given-names>T.N.</given-names>
          </person-name>
        </authors>
        <article-title>A new obligate halophilic methane-producing bacterium.</article-title>
        <year>1983</year>
        <volume>52</volume>
        <fpage>375</fpage>
        <lpage>382</lpage>
        <source id="130">Mikrobiologiya (Russian)</source>
        <issn>0026-3656</issn>
      </citation>
    </reference>
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      <citation citation-type="journal">
        <authors>
          <person-name>
            <surname>Kendall</surname>
            <given-names>M.M.</given-names>
          </person-name>
          <person-name>
            <surname>Liu</surname>
            <given-names>Y.</given-names>
          </person-name>
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