Marsh, who examined the specimen in 1881, thought that this small skeleton in the Compsognathus belly was an embryo, but in 1903, Franz Nopcsa concluded that it was a lizard.
Marsh, der undersøgte eksemplaret i 1881, troede at det lille skelet inde i Compsognathus var et foster, men i 1903 konkluderede Franz Nopcsa at det var et firben.