Hi @RebecaO,
I’ll defer to Scott about mapping your data to the mouse cortex + Hippocampus taxonomy (Yao et al, 2021), but I did want to mention two things.
First, the taxonomy itself is available in a format more accessible to cell type mapper here: AllenInstituteTaxonomy/taxonomies.md at main · AllenInstitute/AllenInstituteTaxonomy · GitHub (second row from the bottom of the table).
Second, Annotation Comparison Explorer (ACE) has a way of visualizing (see below for proper configuration of app) and computationally comparing cell types from these two taxonomies (using data in top link in the image below):
I just posted a longer post about ACE earlier today if you want more details.
Best,
Jeremy