Megasphaera
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Megasphaera is a genus of Bacillota bacteria classified within the class Negativicutes.
This classification has been reexamined. This genus appears to be a member of the Clostridia.
Phylogeny
The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI).
| 16S rRNA based LTP_10_2024 | 120 marker proteins based GTDB 10-RS226 |
|---|---|
| Megasphaera M. micronuciformis Marchandin et al. 2003 Anaeroglobus geminatus Carlier et al. 2002 M. paucivorans Juvonen and Suihko 2006 M. sueciensis Juvonen and Suihko 2006 M. cerevisiae Engelmann and Weiss 1986 M. vaginalis Bordigoni et al. 2020 non Srinivasan et al. 2021 M. hutchinsoni Srinivasan et al. 2021 M. lornae Srinivasan et al. 2021 M. hexanoica Jeon et al. 2017 M. hominis Liu et al. 2022 M. butyrica Hitch et al. 2022 M. stantonii Maki & Looft 2018 M. massiliensis Padmanabhan et al. 2016 M. elsdenii (Gutierrez et al. 1959) Rogosa 1971 M. indica Lanjekar et al. 2014 | Megasphaera_C Megasphaera hutchinsoni Megasphaera lornae "Caecibacter" "Megasphaera hominis" "C. massiliensis" Ricaboni et al. 2017 (incl. Megasphaera hexanoica) Megasphaera paucivorans Anaeroglobus Megasphaera vaginalis "A. micronuciformis" "Colibacter massiliensis" Mailhe et al. 2017 A. geminatus Megasphaera M. cerevisiae M. stantonii M. massiliensis M. elsdenii "M. intestinihominis" Hitch et al. 2025 |
| Megasphaera | M. micronuciformis Marchandin et al. 2003 Anaeroglobus geminatus Carlier et al. 2002 M. paucivorans Juvonen and Suihko 2006 M. sueciensis Juvonen and Suihko 2006 M. cerevisiae Engelmann and Weiss 1986 M. vaginalis Bordigoni et al. 2020 non Srinivasan et al. 2021 M. hutchinsoni Srinivasan et al. 2021 M. lornae Srinivasan et al. 2021 M. hexanoica Jeon et al. 2017 M. hominis Liu et al. 2022 M. butyrica Hitch et al. 2022 M. stantonii Maki & Looft 2018 M. massiliensis Padmanabhan et al. 2016 M. elsdenii (Gutierrez et al. 1959) Rogosa 1971 M. indica Lanjekar et al. 2014 |
| M. micronuciformis Marchandin et al. 2003 | |
| Anaeroglobus geminatus Carlier et al. 2002 M. paucivorans Juvonen and Suihko 2006 M. sueciensis Juvonen and Suihko 2006 M. cerevisiae Engelmann and Weiss 1986 M. vaginalis Bordigoni et al. 2020 non Srinivasan et al. 2021 M. hutchinsoni Srinivasan et al. 2021 M. lornae Srinivasan et al. 2021 M. hexanoica Jeon et al. 2017 M. hominis Liu et al. 2022 M. butyrica Hitch et al. 2022 M. stantonii Maki & Looft 2018 M. massiliensis Padmanabhan et al. 2016 M. elsdenii (Gutierrez et al. 1959) Rogosa 1971 M. indica Lanjekar et al. 2014 | |
| Anaeroglobus geminatus Carlier et al. 2002 M. paucivorans Juvonen and Suihko 2006 M. sueciensis Juvonen and Suihko 2006 M. cerevisiae Engelmann and Weiss 1986 M. vaginalis Bordigoni et al. 2020 non Srinivasan et al. 2021 | |
| Anaeroglobus geminatus Carlier et al. 2002 | |
| M. paucivorans Juvonen and Suihko 2006 M. sueciensis Juvonen and Suihko 2006 M. cerevisiae Engelmann and Weiss 1986 M. vaginalis Bordigoni et al. 2020 non Srinivasan et al. 2021 | |
| M. paucivorans Juvonen and Suihko 2006 M. sueciensis Juvonen and Suihko 2006 | |
| M. paucivorans Juvonen and Suihko 2006 | |
| M. sueciensis Juvonen and Suihko 2006 | |
| M. cerevisiae Engelmann and Weiss 1986 M. vaginalis Bordigoni et al. 2020 non Srinivasan et al. 2021 | |
| M. cerevisiae Engelmann and Weiss 1986 | |
| M. vaginalis Bordigoni et al. 2020 non Srinivasan et al. 2021 | |
| M. hutchinsoni Srinivasan et al. 2021 M. lornae Srinivasan et al. 2021 M. hexanoica Jeon et al. 2017 M. hominis Liu et al. 2022 M. butyrica Hitch et al. 2022 M. stantonii Maki & Looft 2018 M. massiliensis Padmanabhan et al. 2016 M. elsdenii (Gutierrez et al. 1959) Rogosa 1971 M. indica Lanjekar et al. 2014 | |
| M. hutchinsoni Srinivasan et al. 2021 M. lornae Srinivasan et al. 2021 | |
| M. hutchinsoni Srinivasan et al. 2021 | |
| M. lornae Srinivasan et al. 2021 | |
| M. hexanoica Jeon et al. 2017 M. hominis Liu et al. 2022 M. butyrica Hitch et al. 2022 M. stantonii Maki & Looft 2018 M. massiliensis Padmanabhan et al. 2016 M. elsdenii (Gutierrez et al. 1959) Rogosa 1971 M. indica Lanjekar et al. 2014 | |
| M. hexanoica Jeon et al. 2017 M. hominis Liu et al. 2022 | |
| M. hexanoica Jeon et al. 2017 | |
| M. hominis Liu et al. 2022 | |
| M. butyrica Hitch et al. 2022 M. stantonii Maki & Looft 2018 M. massiliensis Padmanabhan et al. 2016 M. elsdenii (Gutierrez et al. 1959) Rogosa 1971 M. indica Lanjekar et al. 2014 | |
| M. butyrica Hitch et al. 2022 M. stantonii Maki & Looft 2018 | |
| M. butyrica Hitch et al. 2022 | |
| M. stantonii Maki & Looft 2018 | |
| M. massiliensis Padmanabhan et al. 2016 M. elsdenii (Gutierrez et al. 1959) Rogosa 1971 M. indica Lanjekar et al. 2014 | |
| M. massiliensis Padmanabhan et al. 2016 | |
| M. elsdenii (Gutierrez et al. 1959) Rogosa 1971 M. indica Lanjekar et al. 2014 | |
| M. elsdenii (Gutierrez et al. 1959) Rogosa 1971 | |
| M. indica Lanjekar et al. 2014 | |
| Megasphaera_C Megasphaera hutchinsoni Megasphaera lornae "Caecibacter" "Megasphaera hominis" "C. massiliensis" Ricaboni et al. 2017 (incl. Megasphaera hexanoica) Megasphaera paucivorans Anaeroglobus Megasphaera vaginalis "A. micronuciformis" "Colibacter massiliensis" Mailhe et al. 2017 A. geminatus Megasphaera M. cerevisiae M. stantonii M. massiliensis M. elsdenii "M. intestinihominis" Hitch et al. 2025 | |
| Megasphaera_C Megasphaera hutchinsoni Megasphaera lornae | |
| Megasphaera_C | Megasphaera hutchinsoni Megasphaera lornae |
| Megasphaera hutchinsoni | |
| Megasphaera lornae | |
| "Caecibacter" "Megasphaera hominis" "C. massiliensis" Ricaboni et al. 2017 (incl. Megasphaera hexanoica) Megasphaera paucivorans Anaeroglobus Megasphaera vaginalis "A. micronuciformis" "Colibacter massiliensis" Mailhe et al. 2017 A. geminatus Megasphaera M. cerevisiae M. stantonii M. massiliensis M. elsdenii "M. intestinihominis" Hitch et al. 2025 | |
| "Caecibacter" "Megasphaera hominis" "C. massiliensis" Ricaboni et al. 2017 (incl. Megasphaera hexanoica) Megasphaera paucivorans Anaeroglobus Megasphaera vaginalis "A. micronuciformis" "Colibacter massiliensis" Mailhe et al. 2017 A. geminatus | |
| "Caecibacter" "Megasphaera hominis" "C. massiliensis" Ricaboni et al. 2017 (incl. Megasphaera hexanoica) | |
| "Caecibacter" | "Megasphaera hominis" "C. massiliensis" Ricaboni et al. 2017 (incl. Megasphaera hexanoica) |
| "Megasphaera hominis" | |
| "C. massiliensis" Ricaboni et al. 2017 (incl. Megasphaera hexanoica) | |
| Megasphaera paucivorans Anaeroglobus Megasphaera vaginalis "A. micronuciformis" "Colibacter massiliensis" Mailhe et al. 2017 A. geminatus | |
| Megasphaera paucivorans | |
| Anaeroglobus Megasphaera vaginalis "A. micronuciformis" "Colibacter massiliensis" Mailhe et al. 2017 A. geminatus | |
| Anaeroglobus | Megasphaera vaginalis "A. micronuciformis" "Colibacter massiliensis" Mailhe et al. 2017 A. geminatus |
| Megasphaera vaginalis | |
| "A. micronuciformis" "Colibacter massiliensis" Mailhe et al. 2017 A. geminatus | |
| "A. micronuciformis" | |
| "Colibacter massiliensis" Mailhe et al. 2017 A. geminatus | |
| "Colibacter massiliensis" Mailhe et al. 2017 | |
| A. geminatus | |
| Megasphaera M. cerevisiae M. stantonii M. massiliensis M. elsdenii "M. intestinihominis" Hitch et al. 2025 | |
| Megasphaera | M. cerevisiae M. stantonii M. massiliensis M. elsdenii "M. intestinihominis" Hitch et al. 2025 |
| M. cerevisiae M. stantonii | |
| M. cerevisiae | |
| M. stantonii | |
| M. massiliensis M. elsdenii "M. intestinihominis" Hitch et al. 2025 | |
| M. massiliensis | |
| M. elsdenii "M. intestinihominis" Hitch et al. 2025 | |
| M. elsdenii | |
| "M. intestinihominis" Hitch et al. 2025 | |
Unassigned species:
- M. jansseni Heng et al. 2025
- "M. vaginalis" Srinivasan et al. 2021 non Bordigoni et al. 2020
See also
- Arik, H. D., Gulsen, N., Hayirli, A., & Alatas, M. S. (2019). Efficacy of Megasphaera elsdenii inoculation in subacute ruminal acidosis in cattle. Journal of animal physiology and animal nutrition, 103(2), 416–426.