Fig. 1From: Sex determination systems in reptiles are related to ambient temperature but not to the level of climatic fluctuationPhylogenetic relationship between sex determination systems and ambient temperature in reptiles. Relationships for 213 species with known breeding season (GSD = 112 species, TSD = 101 species). Light and dark green represent genotypic and temperature-dependent sex determination, respectively. Squares with colour gradient yellow-red indicate ambient temperatures over breeding seasons: very cold (0–15 °C), cold (16–19 °C), mild (20–23 °C), warm (24–25 °C), and very warm (26–29 °C), respectively. Squares with colour gradient turquoise-black indicate temperature variation during breeding seasons (seasonality). Squares with colour gradient grey-black indicate interannual temperature fluctuation over breeding seasons. Names in the phylogenetic tree correspond to reptile orders or infraordersBack to article page