Saramuyos are the same as Anon, Sugar-apple, Sweetsop, and many other common names.
Central-Eastern Mexico and South-Eastern Mexico have a wide variability of Annona squamosa, and are thought to be the native area of origin of the species. Because the seeds stay viable for months, or even more than one year, this species was among the first few that the early European explorers succeeded in spreading far and wide -- including to Brazil and India, where many now contend that sugar-apple is native.