four or fewer fingers. Analyses which consider Westlothiana to possess only four fingers generally agree that it is a lepospondyl. The pelvis (hip) is large, with the upper portion formed by a rod-shaped ilium and the lower portion formed by a narrow and long "puboischiadic plate". The rear portion of the puboischiadic plate is particularly elongated in Westlothiana compared to in other reptiliomorphs, but the other parts of the pelvis are fairly normal by the group's standards. The femur is long and robust, and is also thinnest in the middle as with the humerus. Also similar to the humerus, the femur's crests and roughened areas for muscle attachment are large considering the small size of the animal. Although the femur is generally similar to that of synapsids, the tibia and fibula are much more simple and primitive. In addition, they are noticeably smaller than the femur, a condition reversed to the trend in most reptiliomorphs leading to amniotes. Ankle and foot The ankle of Westlothiana was similar (but probably not identical) to that of basal amniotes, rather than amphibians. In modern amphibians and most non-amniote tetrapods, the ankle is formed by twelve bones. Five small, rounded ankle bones, known as "distal tarsals", connect to the metatarsal bones which each lead to a toe. Three somewhat larger ankle bones, known as "proximal tarsals", connect to the bones of the lower leg. These three are the medium-sized fibulare (which connects to the fibula), the small tibiale (which connects to the tibia), and the quite large intermedium which lies in the middle and contacts both the fibula and tibia. Four small numbered bones known as "centralia" fill in the gaps between the proximal and distal tarsals. In basal amniotes, the condition is quite different, with the ankle only formed by eight bones. The five distal tarsals are typically unchanged, but usually only a single centrale is preserved. This single remaining centrale, referred to as the "navicular" bone, was either formed by the retention of only the second centrale or the fusion of the first and second. Amniotes are also very different from amphibians in the fact that they possess only two large proximal tarsals. The calcaneum, which contacts the fibula, is almost unanimously considered to be identical to the fibulare. The other proximal tarsal, the astragalus (or talus), is likely a mass formed by the fusion of the intermedium, tibiale, and the fourth