According to a study published in
the journal Paleobiology, as weather patterns in the region changed, the land started to dry out and affect the animals» food supply.
Engelman; along with Federico Anaya, professor of geological engineering at Universidad Autónoma Tomás Frías, in Potosí, Bolivia; and Darin Croft, anatomy professor at Case Western Reserve School of Medicine, describe the animals, where they fit in the family, and their paleoecology and
paleobiology in the
Journal of Systematic Palaeontology.