The tarsals and feet are purplish red. The two distal tarsals (III and IV) were roughly triangular. "Gongxianosaurus" is the only known sauropod with ossified distal tarsals. In addition, "Vallesaurus" also has modified distal tarsals and metatarsals, and a clawless hallux. The tarsals are relatively poorly-preserved. A set of complete ribs, vertebrae, a scapula, and tarsals have been found to date. The tibia and fibula articulate with the tarsals of the pes, commonly called the foot. The tarsals (ankle bones) were much more robust than the carpals, but also more disarticulated. The proximal tarsals are never fused in a separate astragalocalcaneum; a tibiotarsus is formed. The five distal tarsals are typically unchanged, but usually only a single centrale is preserved. A individual of "B. isis" had hind limbs with fused tarsals and only three digits. Five metatarsals and two tarsals are known, with the fifth metatarsal slightly hooked. It was a close relative to "Rodhocetus" and its tarsals indicate it resembled an artiodactyl. Its soles and tarsals are naked, and it has long and moderately stout claws.