廣古菌門

廣古菌門（學名：Euryarchaeota）包含了古菌中的大多數種類，包括了經常能在動物腸道中發現的產甲烷菌、在極高鹽濃度下生活的鹽桿菌、一些超嗜熱的好氧和厭氧菌，也有海洋類群。在16S rRNA系統發育樹上，它們組成一個單系群。

广古菌门
Halobacterium salinarum NRC-1
科学分类
域：	古菌域 Archaea
门：	广古菌门 Euryarchaeota Garrity and Holt, 2001
綱
见正文

下属分类

本门包括以下纲：

• 古球狀菌綱 Archaeoglobi Garrity and Holt 2002
• 鹽桿菌綱 Halobacteria Grant et al. 2002
• 甲烷桿菌綱 Methanobacteria Boone 2002
• 甲烷球菌綱 Methanococci Boone 2002
  • 甲烷球菌目 Methanococcales Balch and Wolfe 1981
    • Methanocaldococcaceae Whitman et al. 2002
      • Methanocaldococcus Whitman 2002
        • Methanocaldococcus bathoardescens Stewart et al. 2015
        • Methanocaldococcus fervens (Jeanthon et al. 1999) Whitman 2002
        • Methanocaldococcus indicus L'Haridon et al. 2003
        • Methanocaldococcus infernus (Jeanthon et al. 1998) Whitman 2002
        • Methanocaldococcus jannaschii (Jones et al. 1984) Whitman 2002
        • Methanocaldococcus lauensis L'Haridon et al. 2023^[1]
        • Methanocaldococcus villosus Bellack et al. 2011
        • Methanocaldococcus vulcanius (Jeanthon et al. 1999) Whitman 2002
      • Methanocaldococcus Boone et al. 1993
      • Methanoignis Boone et al. 1993
      • Methanotorris Whitman 2002
    • 甲烷球菌科 Methanococcaceae Balch and Wolfe 1981
      • 甲烷球菌属 Methanococcus Kluyver and van Niel 1936 (Approved Lists 1980)
      • Methanofervidicoccus Sakai et al. 2019
      • Methanothermococcus Whitman 2002
• 甲烷微菌綱 Methanomicrobia
• Methanonatronarchaeia Sorokin et al. 2018
• 甲烷火菌綱 Methanopyri Garrity and Holt 2002
• 熱球菌綱 Thermococci Zillig and Reysenbach 2002
• 熱原體綱 Thermoplasmata Reysenbach 2002