Right. Until it changes again...Both names, Astrochelys yniphora and Geochelone yniphora, have been used to refer to the Ploughshare tortoise. However, the most current and widely accepted scientific name for this species is Astrochelys yniphora. The taxonomy of certain species, including tortoises, can change over time as more research is conducted and new information becomes available. In this case, the genus name was updated from Geochelone to Astrochelys. Therefore, if you want to use the most up-to-date and scientifically recognized name, you should refer to the species as Astrochelys yniphora.