NCBI
NCBI Taxonomy taxdump · 2026-10-23taxid: 856
Bacteria > Fusobacteriota > Fusobacteriia > Fusobacteriales > Fusobacteriaceae > Fusobacterium > Fusobacterium varium
Fusobacterium varium
Species in genus Fusobacterium, family Fusobacteriaceae (order Fusobacteriales). (from NCBI Taxonomy lineage)
Names over time
Loading the names
Cross-database view
GTDB
Fusobacterium_A varium
id: s__Fusobacterium_A varium · GTDB R232
Database's species id. At its weakest, linked by GTDB's own NCBI species id rather than the genome's raw one.
d__Bacteria;p__Fusobacteriota;c__Fusobacteriia;o__Fusobacteriales;f__Fusobacteriaceae;g__Fusobacterium_A;s__Fusobacterium_A varium
SILVA
Fusobacterium varium
id: CS600375 · SILVA 138.2
Walked up to species. At its weakest, linked by walking up 1 level from a strain or subspecies record to the species.
Bacteria;Fusobacteriota;Fusobacteriia;Fusobacteriales;Fusobacteriaceae;Fusobacterium;
Greengenes2
Fusobacterium_A ulcerans
id: Fusobacterium_A ulcerans (+1) · Greengenes2 2024.09
Genome accession. Linked via GTDB R220 genome accessions — the same physical genomes, not a name match.
d__Bacteria; p__Fusobacteriota; c__Fusobacteriia; o__Fusobacteriales; f__Fusobacteriaceae; g__Fusobacterium_A; s__Fusobacterium_A ulcerans
Renamed: Greengenes2 gives this taxon a different name in 2022.10, 2024.09.
eHOMD
Release 4.2No record in eHOMD 4.2.
Each panel shows one release. Switch a release to see how that database's answer changes — the taxon is held fixed by NCBI taxid, so every panel describes the same organism. Each panel also says how it was linked; how the databases are joined explains the routes.
Lineage by rank
| Rank | NCBI | GTDB R232 | SILVA 138.2 | Greengenes2 2024.09 |
|---|---|---|---|---|
| domain | Bacteria | Bacteria | Bacteria | Bacteria |
| phylum | Fusobacteriota | Fusobacteriota | Fusobacteriota | Fusobacteriota |
| class | Fusobacteriia | Fusobacteriia | Fusobacteriia | Fusobacteriia |
| order | Fusobacteriales | Fusobacteriales | Fusobacteriales | Fusobacteriales |
| family | Fusobacteriaceae | Fusobacteriaceae | Fusobacteriaceae | Fusobacteriaceae |
| genus | Fusobacterium | first rank that differs from NCBI: Fusobacterium_A | Fusobacterium | first rank that differs from NCBI: Fusobacterium_A |
| species | Fusobacterium varium | Fusobacterium_A varium | — | Fusobacterium_A ulcerans |
Each column is the release its box shows. marks the first rank at which a database's name differs from NCBI's, by exact text; a suffix such as _A counts. SILVA's path and eHOMD's columns end at genus, so their species row is blank; the box above names the species. Levels a source labels outside these seven ranks are in the API's ranks and not drawn here.
Names in NCBI
from NCBI Taxonomy taxdump · 2026-10-23- Fusobacterium variumcurrent
- Actinomyces pseudo-necro-phorussynonym
- Bacteroides variussynonym
- Fusobacterium necrophorum biovar Csynonym
- Fusobacterium pseudonecrophorumsynonym
- Pseudobacterium variumsynonym
- "Sphaerophorus pseudonecrophorus" (Harris and Brown 1927) Prevot 1940synonym
- Sphaerophorus variussynonym
- Sphaerophorus varius var. sulfitoreductanssynonym
- Fusibacterium pseudonecrophorumequivalent
- Fusibacterium variumequivalent
Other names in these databases
GTDB R232
- Fusobacterium_A varium
- Fusobacterium_A varium_A
- Fusobacterium_A ulcerans_A
- Fusobacterium_A varium_C
SILVA 138.2
- Fusobacterium varium
- Fusobacterium varium ATCC 27725
Greengenes2 2024.09
- Fusobacterium_A ulcerans
- Proteus mirabilis