Here is the full set of the homeworlds series, now including Rannoch, Dekuuna and poor tiny little Suen. Kind of amusing/sad that the rachni homeworld could easily be a moon to Dekuuna!
(The criterion for inclusion on these sets was “species that are not technically extinct in 2183-6”. I’ve left aside the Leviathans as, given the age of their civilisation, it’s quite possible that their original homeworld no longer exists.)
EDIT: there is an updated, fully-combined version of this graphic here: