[1] Fossils of Amygdalodon have been found in the Toarcian Cerro Carnerero Formation of the Jurassic (about 180-172 million years ago).

[1] Until 1936 sauropod fossils from Argentina were completely unknown then, prompted by Piatnitzky's brief mention of "bones of a saurian of no less than 5-7m long", Dr. Tomás Suero took a trip to Chubut to check out deposits overlying the Liassic of the Pampa de Agnia and discovered the remains of a Jurassic sauropod dinosaur around twice the size of Piatnitzky's estimation (in 1936).

[3] Rauhut (2003) placed Amygdalodon as Eusauropoda incertae sedis based on examination of the type material.

[4] Later, a cladistic analysis conducted by Carballido et al. (2010) recovered the genus as a non-eusauropod sauropod.

They found it in a polytomy with the Asian taxon Gongxianosaurus, and possibly related to South American Volkheimeria, though the latter had a very labile position.