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:; 1. The taxon name/concept in the original scientific publication(s) correspond to the NCBI taxon, and sequence data are available.

:: Example: ''Candidatus'' Megaira polyxenophila is a bacterium that has been described in the scientific literature, and given a provisional ("Candidatus") name at the species level. An NCBI taxon ID has been assigned to this taxon name, which corresponds to the taxon concept from the literature.  

:: In some cases, a taxon concept has been assigned a different name in the publication from the name that appears in the NCBI Taxonomy record. This usually happens when a sequence was first published in NCBI under a temporary name, which has not been updated with the subsequent formal name. These are nonetheless encoded here as "taxon" items, but are additionally tagged as [[Item:Q658|"NCBI taxon name needs updating"]]. Example: [[Item:Q2018|''Candidatus'' Vesiculincola pelomyxae]] is still listed under a provisional name "Eubacteriales bacterium SKADARSKE-1" in the NCBI Taxonomy, but the provisional name is clearly unique and refers to the same taxon entity as the published name.

:; 2. The taxon name/concept in the original publication does not correspond exactly to the NCBI taxon, but sequence data are available.

::* Organism was identified with group-specific molecular probes, but these were not sufficient to identify them to the species or strain level.

:: Example: The ciliate [[Item:Q1782|''Frontonia leucas'']] is associated with [[Item:Q158|unclassified Alphaproteobacteria]], identified with group-specific molecular probes. However, no sequence data were reported that would allow the bacteria to be identified more specifically.

:; Summary:

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