<b>Phymaturus aguanegra</b>, a medium-sized lizard native to the temperate forests and rocky outcrops of Patagonia, showcases a robust body with deep gray or black coloration, aiding its camouflage in harsh, arid climates. This insectivorous species is primarily diurnal, exhibiting distinctive territorial behaviors during mating season, while facing threats from habitat loss, leading to its vulnerable conservation status.