(1) The first dorsal has been found divided into two, one part going to the pollex and one to the index; this is a very rare anomaly, not occurring more often than once in 120 subjects.(2) Four clawed digits are found on each forefoot (the pollex or u2018thumbu2019 is small and bears a nail); the hind foot in most has five clawed digits (but sometimes the hallux or first toe has a nail).(3) The eyes are usually very small, the feet are plantigrade and have five digits, and neither the hallux or pollex is opposable.(4) The forefeet and hindfeet have 3 large digits; the pollex and hallux are reduced in size or absent and the fifth finger is very small.(5) All eusauropods, in contrast, are characterized by a shortened manus in which each digit bears two or fewer phalanges, and only the pollex bears an ungual.
