2012 by Ariana Paulina Carabajal, CT scanned the A. wichmannianus braincase which revealed the complete brain endocast and the inner ear structures. The brain endocast and inner ear share several features with other titanosaurids such as short olfactory tracts and olfactory bulbs that are horizontally projected. Powell compared the width of the cranium to the length of the limb bones of both A. wichmannianus and Saltasaurus; this led him to conclude that the skull was proportionally small in A. wichmannianus, this might imply that the skull and limb elements could belong to different individuals or a different taxa. He noted, however, that the comparison was potentially misleading because the overall anatomy of Saltasaurus is shorter and stouter which might facilitate a bigger skull. Von Huene assigned two tarsal (ankle) bones to A. wichmannianus, which he described as an astragalus and a calcanium. Powell suggested it's possible that the calcanium described by von Huene is actually the astragalus of a smaller individual. He also noted that the astragalus seems too small to belong to the same individual as the tibia, being only about half the width. Von Huene described a caudal vertebra which was found close to the skull material. This vertebra was the first caudal, belonging to the base of the tail just after the sacrum (vertebrae attached to the hip). The vertebra features a biconvex centrum, a feature shared with other titanosaurs. Von Huene noted that the first caudal could possibly belong to Laplatasaurus. With the exception of an incomplete cervical vertebra and the questionable first caudal, there are no vertebrae that link the skull to the limb material. There is a lack of field documentation to aid in the referral of all the material to one individual. Powell thought it was probable that von Huene correctly assigned the material to A. wichmannianus, arguing that von Huene would have been able to communicate with the discoverers and would have had access to photographs of the discovery site. "Antarctosaurus" giganteus The type specimen of A. giganteus, MLP 26-316, includes a left and right femur, a partial left and right pubis, the distal end of a damaged tibia, numerous rib and distal caudal vertebrae fragments, and six large and unidentifiable bones. The two gigantic femora measure in length, which are among the largest of any known sauropod. Even though the femurs are large, they are also somewhat gracile in construction. A