Schleich 15011 Dimetrodon Dinosaur Figure The Dimetrodon is often referred to as a dinosaur. However, it is a primaeval reptile, a so-called Pelycosaurus. The Dimetrodon is often referred to as a dinosaur. However, it is a primaeval reptile, a so-called Pelycosaurus. The sail on its back was made of skin and bones, helping it to warm itself quicker in the sun. If it wanted to cool down, it positioned the sail parallel to the sun's rays. Dimensions 5.71 x 2.56 x 3.46 inch (W x D x H) Suggested age suitability 4 years and upwards.EU Warning: Not suitable for children under the age of 3 years due to small parts which could cause a choking hazard.