A.wichmannianus is known from a supposedly associated partial skeleton of a very large animal, consisting of a cranium, partial mandible, fragmentary cervical, scapula, incomplete humerus, metacarpus, incomplete ischium , femur, tibia, fibula, metatarsus, and fragments. Other specimens of a large animal (Bonaparte and Bossi,1967) have been referred to this genus. 

Among the distinguishing features of the skull fragment are the very slender parasphenoid ( in sharp contrast to those of Camarasaurus and especially Quaesitosaurus) and the large prefrontal, whose articular surface with the frontal occupies more than half of the rostral margin of that element and suggests that the missing nasal must be quite different from that of either Diplodocus or Camarasaurus. 

The mandible is square in front like that of Diplodocus. Largely on the basis of the similarities in the mandible and weak dentition, Huene,1929 has restored the skull along the lines of Diplodocus, but much of this restoration is hypothetical. A single badly preserved cervical is of no diagnostic value.