Cell type nomenclature table

I currently work with the mice dataset hereA taxonomy of transcriptomic cell types across the isocortex and hippocampal formation and I got overwhelmed by the amount of different neuronal cell types.
My question is now:
Is there any comprehensive listing of all cell types you have found so far?
And is there any easy way for coarsening the resolution of those cell types, e.g. reduce it to the highes nodes in the dendrogram like GABAeric, glutameric neurons and non neural cells?
I am basically looking for any datastructure which represents the dendrogram such that I do not need to hardcode the cell types by hand.

I hope I was able to explain my problem to you.
All the best and thanks in advance,

Just figured out I was working on a outdated version.
Found the files I requested here: