Each group and species is considered in rough phylogenetic order (according to its evolutionary development), so the species tend to get progressively more “advanced” as one reads on. (Realistic dinosaur costume)The phylogenetic relationships and age of most genera examined in this catalog are detailed in Figure 10-1. In the chart, species become younger going to the right, and more “advanced” going down and, sometimes, right. All the relationships are tenuous to lesser or greater degrees;(Walking dinosaur costume) I have indicated when they are especially so by a question mark.
As you may notice, all forty of the skeletal drawings in Part II, representing thirty-four species , are drawn in the sarne pose, running full tilt with their mouths open and the left hind limb pushing off. The neck is shown in “neutral posture,” with the vertebrae following the curvature in which they naturally articulated. The head is gently flexed on the curved neck. The left arm is shown partly tucked up, with the bones in the same direct side view as the hind-limb elements, making it possible to contrast the size and shape of the finger and toe claws. I also show them this way-even though the arm and leg bones really faced a little outwards because the elbows and knees were bowed out-both to simpliff the execution and to make the comparisons between the species easier. (animatronic dinosaur)The same advantages of simplification of execution and comparability are gained by drawing all the skeletons in a uniform pose-although some modest differences that do exist among the species are reflected in the restorations. I have found this uniform system to be very valuable in understanding these creatures, and my thoughts about a dinosaur have often changed after preparing a detailed skeletal restoration and contrasting it to others.