Taxonomy problems on algae: Is Cryptophyta a Phylum or a Class rank?
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2.7 years ago

I am currently interested in algae taxonomy (I am not an expert in the field).

I retrieved the taxonomy of my sequences with their NCBI access number via the taxonkit software (https://bioinf.shenwei.me/taxonkit/usage/).

I noticed that I get Cryptophyta at the Class rank level.

For me -phyta actually corresponds more to the phylum rank.

I checked on NCBI site and is actually tidy in Class rank ( https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=3027&lvl=3&lin=f&keep=1&srchmode=1&unlock) but for example on the algaebase database (http://www.algaebase.org/browse/taxonomy/detail/?taxonid=Xafa8c1d30aa53593), Cryptophyta is classified as Phylum.

Can you tell me why Cryptophyta is rank at the Class level on NCBI and not to the Phylum level ?

Conversely, I retrieve taxonomy with, for example, Phaeophyceae ranked at Phylum level (https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=2870&lvl=3&lin=f&keep=1&srchmode= 1 & unlock) while it is normally a Class on algaebase (http://www.algaebase.org/browse/taxonomy/detail/?taxonid=L8055ac0a94735f3e).

Do you have ideas being considered? I am very interested !

Thank you very much in advance for your answers.

Best regards

taxonomy ncbi algaebase Cryptophyta phylum • 790 views
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I think this problem might be better discussed at some biology stackexchange forum?

Also, NCBI taxonomy has the following disclaimer on each taxon page: "Disclaimer: The NCBI taxonomy database is not an authoritative source for nomenclature or classification - please consult the relevant scientific literature for the most reliable information."

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Thank you very much for your answer. Indeed, I will ask the question on this forum. I quite agree to check in the literature, however when the problem is at the level of the taxonomic rank of the Phylum and on fairly well described groups I thought that there was a certain uniformity especially that in Federhen 2012 (The NCBI Taxonomy database), NBCI indicates that they make a link for algae with the taxonomy of the algaebase database ... that's why I ask myself these questions ...

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