Archaeoindris
Though similar to "Palaeopropithecus", "Archaeoindris" was significantly larger and more robust. "Archaeoindris" was one of the largest primates to ever evolve, and was the largest-known strepsirrhine primate, weighing an estimated . It was roughly the size of an adult male gorilla, which was first noted by Lamberton.
Largest prehistoric animals
The largest-known bird of prey ever was the enormous Haast's eagle ("Harpagornis moorei"), with a wingspan of , relatively short for their size. Total length was probably up to in female and they weighed about . The largest extinct "Titanohierax" was a giant hawk about 8 kilograms that lived in the Antilles, where it was among the top predators.
The largest-known in this group was a giant flightless "Sylviornis", a bird long and weighing up to about .