In March 2013, we discovered a population of skinks on Île Tintamarre located northeast of Saint-Martin. All individuals observed in 2013 and 2014 were found in a network of dry stone walls. Genetic and morphological analyses unambig-uously show that this population belongs to Spondylurus powelli, which also lives on Anguilla and Saint-Barthélemy, and not to S. martinae, the species of adjacent ... [Show full abstract] Saint-Martin. This unexpected pattern of distribution is similar to that of at least one other species of squamate reptile and further supports the distinction of these two recently described species of skinks. The population size is estimated at only 40–50 adult individuals. Threats are specified and we recommend necessary measures for the conservation of this population.