Ovaloolithus dinornithoides Mikhailov, 1994

Photographic image of egg.

        Close Up Image Showing                                    X-Ray of Egg.

Sagenotuberculate Surface Ornamentation

Remarks

• Collection:      Lee Garrison

• Formation:     Dzhadokhta Formation

• Location:        Mongolia

• Dimensions:    length = 3.25", width = 2.50"

• Sorry, no developed embryo in this one.  According to Lee, the two large punctures in the egg and presence of egg shell fragments inside (the white objects visible in the CT scan animation) are evidence of predation.

General Info

Synonyms (older names and misidentifications in the literature)

• Ornithopod egg
• 1994 Ovaloolithus dinornithoides Mikhailov

Stratigraphic Occurrence

• Nemegt Formation of Mongolia

• Dzhadokhta Formation of Mongolia

Age

• Probable Campanian age.  However, no specific time interval or horizon has been reported for O. dinornithoides Mikhailov.

Geographic Occurrence (not an all-inclusive list)

• Mongolia

Remarks

        For photographs and more information see:

• Carpenter, K.  1999.  Eggs, Nests, and Baby Dinosaurs, A Look at Dinosaur Reproduction.  Bloomington & Indianapolis:  Indiana University Press.  Appendix 2.  Parataxonomic List, 281 (description); fig's AII.7.A, B (egg shell photos).

• Mikhailov, K. E.  1994.  Eggs of Sauropod and Ornithopod Dinosaurs from the Cretaceous Deposits of Mongolia.  Paleontological Journal 28 (3), 157; plate X, fig. 5 (translated from Paleontologicheskiy Zhurnal 3, 114–127).