{"id":5545,"date":"2026-02-16T16:16:35","date_gmt":"2026-02-16T07:16:35","guid":{"rendered":"http:\/\/jcm.brc.riken.jp\/en\/?page_id=5545"},"modified":"2026-02-16T16:16:35","modified_gmt":"2026-02-16T07:16:35","slug":"resource_news_e_vol11","status":"publish","type":"page","link":"http:\/\/jcm.brc.riken.jp\/en\/resource_news_e\/resource_news_e_vol11","title":{"rendered":"Prokaryotic strains contributing proposals of new phyla and kingdoms"},"content":{"rendered":"
2026\/02\/16<\/font>\n<\/div>\n

Prokaryotic strains contributing proposals of new phyla and kingdoms<\/font><\/p>\n

Currently, the International Code of Nomenclature of Prokaryotes (ICNP) covers the high-level taxonomic ranks “phylum”, “kingdom” and “domain.” There are two domains \u2013 Bacteria<\/i> and Archaea<\/i> \u2013 with four kingdoms formally approved within each domain. One of the four archaeal kingdoms is Nanobdellati<\/i>. Our research group previously reported Nanobdella aerobiophila<\/i> T<\/sup> (=JCM 33616T<\/sup><\/a>), which is the origin of this kingdom name. In 2024, another archaeal kingdom Promethearchaeati<\/i> was validated based on Promethearchaeum syntrophicum<\/i> MK-D1T<\/sup> (=JCM 39240T<\/sup><\/a>). Meanwhile, in the domain Bacteria<\/i>, proposals for new phyla have been recently made one after another, such as the phylum Minisyncoccota<\/i>, formerly referred to as the CPR (Candidate Phyla Radiation) clade, and the phylum Fidelibacterota<\/i>, previously known as the ‘Marine Group A’ or SAR406 group. Both phylum names are derived from the genus names of Minisyncoccus archaeiphilus<\/i> PMX.108T<\/sup> (=JCM 39522T<\/sup><\/a>) and Fidelibacter multiformis<\/i> IA91T<\/sup> (=JCM 39387T<\/sup><\/a>), respectively. All the above species show special characteristics that could only be demonstrated through cultivation, such as obligate symbiosis with attachment to the cell surface of a specific host, formation of protrusions, or inability to grow without utilizing specific cellular components of other organisms. These reports have provided important insights not only for taxonomy but for whole microbiology, including physiology, ecology, and evolution. At present, strains MK-D1T<\/sup> and PMX.108T<\/sup> are only available from JCM among numerous international culture collections. JCM provides phylogenetically and physiologically diverse strains, in addition to the above strains, as live cultures to the scientific community.<\/font><\/p>\n


\nReferences:
\nKato et al. 2022. Nanobdella aerobiophila<\/i> gen. nov., sp. nov., a thermoacidophilic, obligate ectosymbiotic archaeon, and proposal of Nanobdellaceae<\/i> fam. nov., Nanobdellales<\/i> ord. nov. and Nanobdellia<\/i> class. nov.
\nInt. J. Syst. Evol. Microbiol. 72: 005489.
\nDOI: 10.1099\/ijsem.0.005489<\/a><\/p>\n

Imachi et al. 2024. Promethearchaeum syntrophicum<\/i> gen. nov., sp. nov., an anaerobic, obligately syntrophic archaeon, the first isolate of the lineage ‘Asgard’ archaea, and proposal of the new archaeal phylum Promethearchaeota<\/i> phyl. nov. and kingdom Promethearchaeati<\/i> regn. nov.
\nInt. J. Syst. Evol. Microbiol. 74: 006435.
\nDOI: 10.1099\/ijsem.0.006435<\/a><\/p>\n

Katayama et al. 2024. Fidelibacter<\/i> multiformis gen. nov., sp. nov., isolated from a deep subsurface aquifer and proposal of Fidelibacterota<\/i> phyl. nov., formerly called Marine Group A, SAR406 or Candidatus<\/i> Marinimicrobia.
\nInt. J. Syst. Evol. Microbiol. 74: 006558.
\nDOI: 10.1099\/ijsem.0.006558<\/a><\/p>\n

Nakajima et al. 2025. Minisyncoccus archaeiphilus<\/i> gen. nov., sp. nov., a mesophilic, obligate parasitic bacterium and proposal of Minisyncoccaceae<\/i> fam. nov., Minisyncoccales<\/i> ord. nov., Minisyncoccia<\/i> class. nov. and Minisyncoccota<\/i> phyl. nov. formerly referred to as Candidatus<\/i> Patescibacteria or candidate phyla radiation.
\nInt. J. Syst. Evol. Microbiol. 75: 006668.
\nDOI: 10.1099\/ijsem.0.006668<\/a>
\n<\/font><\/p>\n

 <\/p>\n\n\n\n
<\/td>\n<\/tr>\n
Phylogenetic tree of whole prokaryotes (left) and representative strains of novel phyla and kingdoms (right).<\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

2026\/02\/16 Prokaryotic strains contributing proposals of new phyla and kingdoms Currently, the International Code of Nomenclature of Prokaryotes (ICNP) covers the high-level taxonomic ranks “phylum”, “kingdom” and “domain.” There are two domains \u2013 Bacteria and Archaea \u2013 with four kingdoms formally approved within each domain. One of the four archaeal kingdoms is Nanobdellati. Our research group previously reported Nanobdella aerobiophila T (=JCM 33616T), which is the origin of this kingdom name. In 2024, another archaeal kingdom Promethearchaeati was validated based on Promethearchaeum syntrophicum MK-D1T (=JCM 39240T). Meanwhile, in the domain Bacteria, proposals for new phyla have been recently made one after another, such as the phylum Minisyncoccota, formerly referred to as the CPR (Candidate Phyla Radiation) clade, and the phylum Fidelibacterota, previously known as the ‘Marine Group A’ or SAR406 group. Both phylum names are derived from the genus names of Minisyncoccus archaeiphilus PMX.108T (=JCM 39522T) and Fidelibacter multiformis IA91T (=JCM 39387T), respectively. All the above species show special characteristics that could only be demonstrated through cultivation, such as obligate symbiosis with attachment to the cell surface of a specific host, formation of protrusions, or inability to grow without utilizing specific cellular components of other organisms. These reports have provided […]<\/p>\n","protected":false},"author":17,"featured_media":0,"parent":4527,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"","footnotes":"","_wp_rev_ctl_limit":""},"class_list":["post-5545","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/jcm.brc.riken.jp\/en\/wp-json\/wp\/v2\/pages\/5545","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/jcm.brc.riken.jp\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/jcm.brc.riken.jp\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/jcm.brc.riken.jp\/en\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"http:\/\/jcm.brc.riken.jp\/en\/wp-json\/wp\/v2\/comments?post=5545"}],"version-history":[{"count":1,"href":"http:\/\/jcm.brc.riken.jp\/en\/wp-json\/wp\/v2\/pages\/5545\/revisions"}],"predecessor-version":[{"id":5548,"href":"http:\/\/jcm.brc.riken.jp\/en\/wp-json\/wp\/v2\/pages\/5545\/revisions\/5548"}],"up":[{"embeddable":true,"href":"http:\/\/jcm.brc.riken.jp\/en\/wp-json\/wp\/v2\/pages\/4527"}],"wp:attachment":[{"href":"http:\/\/jcm.brc.riken.jp\/en\/wp-json\/wp\/v2\/media?parent=5545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}