ANKYLOSAURIDAE (Coombs, 1978)

Norman, David B, 2021, Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships, Zoological Journal of the Linnean Society 191 (1), pp. 1-86 : 71

Clade ANKYLOSAURIDAE

Total characters under ACCTRAN 10, DELTRAN 14:

1. Maximum skull width equal to or greater than skull length.

2. Presence of paranasal fossae on the premaxilla.

3. Number of discrete antorbital osteoderms (caputegulae) greater than ten.

4. Skull roof osteoderms (caputegulae) have the form of small mostly rounded plates.

5. Lateral (infra) temporal fenestra occluded by osteoderms.

6. Femoral head terminally positioned on the femoral shaft.

7. Fourth trochanter of the femur is low-mound that surrounds a depressed muscle scar.

8. Fourth trochanter positioned on the distal half of the femoral shaft.

9. Distal tibia and proximal tarsals fused together.

10. Terminal caudal osteoderms combine to form a bony club.