Parvoolithus

Parvoolithus is an oogenus of Mongolian fossil eggs from the Campanian Barun Goyot Formation. They are known from a single small, smooth egg, which cannot be assigned to any known oofamily.^[1] It is very similar to the eggs of modern birds in many aspects; in fact, a cladistic analysis by Zelenitsky and Therrien found it to be a sister taxon to the guinea fowl (genus Numida), indicating that they represent the eggs of birds, rather than a non-avialan theropod.^[2]

Parvoolithus Temporal range: Campanian ~84–70 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Egg fossil classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Oogenus:	†Parvoolithus Mikhailov, 1996
Oospecies
P. tortuosus