While one might assume that different species simply look different from each other, that’s not always the case. Currently, Chilean marked geckos, also known as Garthia geckos, officially consist of two species—Garthia gaudichaudii and Garthia penai. While their study challenges the suggestion that Garthia geckos might all belong to the same species, it doesn’t exactly solve the mystery. The results of their analysis indicate that there are at least two species—the previously mentioned G. gaudichaudii and G. penai—but there could be as many as 11. For example, the researchers found that the similar looking G. gaudichaudii and G. penai genetically diverged 20 million years ago.