a braincase and an incomplete mandible (lower jaw), a cervical (neck) vertebra, a caudal (tail) vertebra, rib fragments, and numerous limb bones including a femur which measures tall. None of the individual fossils were designated the holotype specimen so MACN 6904 is considered to be an assemblage of syntypes. The total length of A. wichmannianus has been estimated at around . An additional femur and tibia were also referred by von Huene to A. wichmannianus; the femur, FMNH P13019, is over tall. In one study the dimensions of this femur were used in a regression analysis to estimate the mass of A. wichmannianus at about . The referral of the additional femur and tibia has been questioned by later researchers. In 2003 Jaime Eduardo Powell tentatively referred them to cf. Argyrosaurus and in 2012 Philip Mannion and Alejandro Otero considered it an indeterminate titanosaur. The incomplete mandible attributed to A. wichmannianus is squared-off at the front with each dentary bone being ''L'' shaped. The teeth were restricted to the front of the lower jaw and were small and slender. The squared-off jaws suggest specialised feeding habits, such as feeding near a surface plane like low vegetation on the ground or floating plants in water. These bones were, for the most part, not associated with each other but scattered throughout the formation. Consequently, many scientists believe that they may not all belong to the same type of animal. In particular, the very square lower jaw has frequently been suggested to belong to a rebbachisaurid sauropod similar to Nigersaurus. However, the jaw of Bonitasaura, described in 2004, is similar in overall shape and is clearly associated with titanosaur skeletal remains, indicating that the lower jaw may belong to A. wichmannianus after all. In 2013 and 2018 respectively, Brasilotitan and Baalsaurus were described which also possessed squared-off jaws. It was noted that Brazilotitan, Bonitasaura, Antarctosaurus, and other titanosaurs show up three teeth per alveolus (tooth socket) whereas the rebbachisaurid Nigersaurus shows up to seven teeth. Brazilotitan and Baalsaurus were described as a titanosaurs, closely related to A. wichmannianus. The back of the skull and the remainder of the skeleton are usually regarded as titanosaurian by researchers, although they do not necessarily belong to the same type of titanosaur. In 2005, Jeffrey Wilson considered the braincase as being referable to Nemegtosauridae but noted that other skull remains require further study. A study, published in