 For example, the Escambray twig anole of Cuba closely resembles the Puerto Rican twig and Jamaican twig anoles, as well as several species of twig ecomorphs from Hispaniola.Despite this they are not closely related and have adapted to their specific niche independently of each other.At least four of the six primary ecomorphs are of ancient origin as they have been documented in amber fossils from Hispaniola that are about 15–20 million years old (the two missing ecomorphs are crown giant and grass bush).