Spheroolithidae

Spheroolithidae is an oofamily of dinosaur eggs. It contains Guegoolithus, Spheroolithus, and Paraspheroolithus.^[1] Like modern birds, the eggshell membrane formed before the calcareous part of the shell.^[2]

Spheroolithidae Temporal range: Early – Late Cretaceous ~136–66 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Spheroolithus eggs from China
Egg fossil classification
Basic shell type:	†Dinosauroid-spherulitic
Oofamily:	†Spheroolithidae
Oogenera
†Guegoolithus †Spheroolithus †Paraspheroolithus

See also

• List of dinosaur oogenera