Because of its unusual features, Agustinia was originally assigned to its own family, Agustiniidae (Bonaparte, 1999). This family name has not come into wide acceptance. Agustinia is difficult to classify because of its fragmentary nature, and because it exhibits features of both diplodocoid and titanosaurian sauropods. Both groups are known in Early Cretaceous Argentina, so Agustinia most likely belongs to one or the other, but until more complete remains are found, it will be hard to know which one.

My customized reconstruction of this dinosaur is based on a speculative painting of this beastie.

I decided to add spikes to the neck and a 'Thagomizer' to the tail - (after all, there were other really weird spikey sauropods around at that time in South America, including some with 'Thagomizers'.)

FIrst I made a cast of a Carnegie Diplodocus head, and attached it to the Procon Collecta Agustinia body with a wire. I extended the tail with another wire and putty.

The paint job naturally 'evolved' as I did it - bluish dark grey with a hint of yellow on the belly, then experimentation til I got a mix of gold and red acrylic paints for the spikes. When dry I sprayed it with acrylic matte sealant.