Hello Biostar,

I'm sorry if this is an innapropriate place to ask for it, but I can't find this file by myself and actually don't know if it exist. I'm looking for a file containing the whole systematic classification of RefSeq, I have a table that would look like this in mind : 

https://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/examples-systematic-classification-table

I mostly need the "species name" (latin) associated with the "class". does anyone know if such a file exist and where I could find it ?

Cheers,

Roxane
You can find this information in the NCBI taxonomy files that can be downloaded from ftp://ftp.ncbi.nlm.nih.gov/pub/taxonomy/new_taxdump. Please see readme file for more info: ftp://ftp.ncbi.nlm.nih.gov/pub/taxonomy/new_taxdump/taxdump_readme.txt

`rankedlineage.dmp` contains following columns. 

    rankedlineage.dmp
    -----------------
    Select ancestor names for well-established taxonomic ranks (species, genus, family, order, class, phylum, kingdom, superkingdom) file fields:
    
        tax_id                  -- node id
        tax_name                -- scientific name of the organism
        species                 -- name of a species (coincide with organism name for species-level nodes)
    	genus					-- genus name when available
    	family					-- family name when available
    	order					-- order name when available
    	class					-- class name when available
    	phylum					-- phylum name when available
    	kingdom					-- kingdom name when available
    	superkingdom				-- superkingdom (domain) name when available

