Named By: Alvarenga - 1985.
Classification: Chordata, Aves, Cariamae, Phorusrhacidae, Psilopterinae.
Species: P. itaboraiensis (type).
Size: Up to 1 meter high.
Known locations: Brazil.
Time period: Selandian of the Paleocene.
Fossil representation: Fossils to identify one species.
Paleopsilopterus is one of the smallest and by far earliest of the group with fossils dating back as far as sixty million years ago. In a world that had seen the disappearance of the dinosaurs under five million years before its existence, Paleopsilopterus thrived and was likely the form that would go onto to produce a greater diversification of terror birds including giants such as Kelenken and Brontornis.