I have good news and bad news about these seeds. The good news is my ordered arrived quickly, the seeds were in good shape and some germinated quickly. The bad news... well, I'll get to that in a moment.
Annona coriacea:
Annona crassiflora:
Duguetia lanceolata:
I grew each of the three species in three separate tubs. The Duguetia and Crassiflora seeds have not yet germinated, but the tub of Coriacea seeds came up very quickly. As the seedlings grew I was surprised to see two very different looking plants in that tub. I asked some friends who have grown Annona coriacea before, and they said neither one of these look like Coriacea. Perhaps they are Annona squamosa, Annona montana, or some other common Annonas.
I don't think Giampaolo is dishonest, but his friend in Brazil is either a scammer or just very sloppy.