Figure 2From: Support for a rare pattern of temperature-dependent sex determination in archaic reptiles: evidence from two species of tuatara (Sphenodon)Relationship between development rate and constant incubation temperature in two Sphenodon species from Cook Strait. Development rate declines at the hottest incubation treatments attempted for S. punctatus, suggesting that the maximum constant temperature tolerated may be only 1–2°C higher.Back to article page