The discovery in 2019 of a lone small female tortoise living on one of the most inaccessible islands of the Galapagos Islands has baffled evolutionary biologists. Only one other tortoise, a large male discovered in 1906, has ever been found on Fernandina Island, an isolated island on the western edge of the iconic archipelago.
source https://www.lifetechnology.com/blogs/life-technology-science-news/discovery-of-lonely-tortoise-doubles-known-members-of-phantasticus-species