Temporal range: Late Cretaceous
|Egg fossil classification|
|Basic shell type:||†Dinosauroid-spherulitic|
Stalicoolithid eggs were first discovered in 1971, but they were described initially as Dendroolithids, or as Spheroolithids, in the case of "Paraspheroolithus" shizuiwanensis and Shixingoolithus.
Stalicoolithids are distinguished from other oofamilies by several characteristics. Most significantly, they have secondary eggshell units in the outer zone, and three distinct subzones of the columnar layer. They have a unique mix of developmental characteristics, giving insight into the evolution of the amniotic eggshell.
Shixingoolithus contains at least two oogenera: Coralloidoolithus and Stalicoolithus. It probably contains Shixingoolithus as well, though this is uncertain. Also, the enigmatic Parvoblongoolithus could potentially be a Stalicoolithid.
- Wang Q, Wang X L, Zhao Z K, and Jiang Y G. (2012). "A new oofamily of dinosaur egg from the Upper Cretaceous of Tiantai Basin, Zhejiang Province, and its mechanism of eggshell formation" Chinese Science Bulletin. 57: 3740-3747. doi: 10.1007/s11434-012-5353-2
- Zhang, S., X. Jin, J.K. O'Conner, M. Wang, and J. Xie. (2015). "A new egg with avian egg shape from the Upper Cretaceous of Zhejiang Province, China." Historical Biology 27(5):595-602.
- Moreno-Azanza, M., J.I. Canudo, and J.M. Gasca. (2014). "Spheroolithid eggshells in the Lower Cretaceous of Europe. Implications for eggshell evolution in ornithischian dinosaurs." Cretaceous Research 51:75-87.
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