Spheroolithus Temporal range: Late Cretaceous ~99.6–66 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
Oogenus:	†Spheroolithus Zhao, 1979
Synonyms
Paraspheroolithus Zhao, 1979

Spheroolithus is an oogenus of dinosaur egg.^[1]

Oospecies

The following species are described:^[2]

• Paraspheroolithus sanwangbacunensis
• Paraspheroolithus yangchengensis
• Spheroolithus albertensis
• Spheroolithus choteauensis
• Spheroolithus europaeus
• Spheroolithus irenensis
• Spheroolithus jincunensis
• Spheroolithus maiasauroides
• Spheroolithus megadermus
• Spheroolithus spheroides
• Spheroolithus tenuicorticus

Distribution

Fossils of the oogenus were found in:^[2]

• Dinosaur Park and Oldman Formations, Alberta, Canada
• China
• Sasayama Group, Japan
• Cerro del Pueblo Formation (Difunta Group), Mexico
• Nemegt & Bayan Shireh Formations, Mongolia
• La Posa Formation (Tremp Group), Spain
• Two Medicine Formation, Montana and North Horn Formation, Utah, United States
• Lameta Formation, India

Gallery

• 
  Spheroolithus sp. eggs
• 
  Paraspheroolithus eggs in Henan Geological Museum