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Potential incongruences in Hartmannella and Vermamoeba taxonomy #59

@mgabriell1

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@mgabriell1

Hello,
First of all, thanks for maintaning PR2, a great resource!

I'm posting here because @Latimeria94 and I noticed some incongruences in the PR2 (v5.1.1) taxonomy of the genera of Vermamoeba and Hartmannella compared to the NCBI taxonomy and Adl et al. (2019, https://doi.org/10.1111/jeu.12691).

In both of those resources, the taxonomic ranks to which these genera belong to are:

  • Vermamoeba: Amoebozoa; Tubulinea; Echinamoebida; Vermamoebidae (NCBI link)
  • Hartmannella: Amoebozoa; Tubulinea; Elardia; Euamoebida; Hartmannellidae (NCBI link)

In PR2 both genera are under "Amoebozoa; Tubulinea, Tubulinea_X; Elardia; Euamoebida; Vermamoebidae".
This PR2 clade includes both the species Vermamoeba vermiformis, as well as _Hartmannella vermiformis.
This PR2 clade contains other species in the Hartmanella genus which have not been subject to such a reclassification, as well as Vermamoeba spp. and Hartmanella spp.

V. vermiformis_ was initially called H. vermiformis based on phenotypical characteristics, but it was later reclassified under a new genus (in a distinct clade, as reflected by NCBI) based on 18S phylogeny (https://doi.org/10.1007/s00248-018-1199-8).

We compared the PR2 sequences belonging to H. vermiformis and V. vermiformis and Vermamoeba spp. and Hartmanella spp. we noticed that they are highly similar. The similarity of the sequences within a species (excluding self-hits) is the same as the one between genera. The unclassified species show a small drop in similarity across genera, but they are still pretty similar.

V. vermiformis vs H. vermiformis
Image

Vermamoeba spp. vs Hartmannella spp.
Image

I noticed that the sequences from my experiment are classified as Hartmannella, but upon Manual inspection they seem very similar to the ones belonging to V. vermiformis. For H. vermiformis I think I can easily rename them, but I have doubts on what to do with the Harmannella spp. found in my dataset.

Do you have some suggestions for my taxonomic assignment?

Thanks

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