In a very detailed article J. de Porta (1960) redescribed the type skull of E. (Amerhippus) lasallei found at Cerrogordo in la Sabana de Bogota at a height of abount 2600m.
All pictures and data given here come from this article.
As noted by J. de Porta, the cranium is very large, elongated, (…)
Azzaroli A. (1992). The present status of knowledge on the Ecuadorian species of the genus Equus. Bolletino della Societa Paleontologica Italiana, 31(1), 133-139.
Machado H. and Avilla L. (2019). The Diversity of South American Equus: Did Size really Matter? Frontiers in Ecology and Evolution, (…)