Shixingoolithus
Shixingoolithus Temporal range:
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Egg fossil classification | |
Basic shell type: | †Dinosauroid-spherulitic |
Oofamily: | †Stalicoolithidae |
Oogenus: | †Shixingoolithus Zhao et al., 1991 |
Oospecies | |
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Shixingoolithus is an
Description
Shixingoolithus eggs are nearly spherical, and about 12 cm in diameter, with a shell thickness of 2.3–2.6 mm. The shell is made up of tall, prismatic units, and has narrow, irregular pore canals. Its cone layer (mammillae) is approximately a fourth of the shell thickness.[3][4]
Paleobiology
Shixingoolithus probably represents eggs of an
They are known from theYuanpu Formation, indicating that they disappeared in the last 200,000 to 300,000 years of the Cretaceous.[7][8]
Parataxonomy
Shixingoolithus was initially described as a member of the
dendroolithid, but a more complete description must be made before its classification can be resolved.[6]
See also
- List of dinosaur oogenera
References
- ISSN 2095-3836.
- ^ Z. Zhao, J. Ye, H. Li, Z. Zhao, and Z. Yan. 1991. Extinction of the dinosaurs across the Cretaceous-Tertiary boundary in Nanxiong Basin, Guangdong Province. Vertebrata PalAsiatica 29(1):1-20
- ^ a b c Carpenter, K. 1999. Eggs, Nests, and Baby Dinosaurs: A Look at Dinosaur Reproduction (Life of the Past). Indiana University Press, Bloomington, Indiana.
- ^ Zhao, Z.K. (1994). "Dinosaur eggs in China: On the structure and evolution of eggshells." In K. Carpenter, K. F. Hirsch, and J. R. Horner (eds.), Dinosaur Eggs and Babies, Cambridge University Press, Cambridge. In K. Carpenter, K. F. Hirsch, and J. R. Horner (eds.), Dinosaur Eggs and Babies, Cambridge University Press, Cambridge 184–203
- JSTOR 4523773.
- ^ a b 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.
- ^ a b Z. Zhao, J. Ye, H. Li, Z. Zhao, and Z. Yan. 1991. "Extinction of the dinosaurs across the Cretaceous-Tertiary boundary in Nanxiong Basin, Guangdong Province." Vertebrata PalAsiatica 29(1):1-20
- ^ Zhao, Z.-k., X. Mao, Z. Chai, G. Yang, P. Kong, M. Ebihara, and Z.-h. Zhao. (2002). "A possible causal relationship between extinction of dinosaurs and K/T iridium enrichment in the Nanxiong Basin, South China: evidence from dinosaur eggshells. Palaeogeography, Palaeoclimatology, Palaeoecology 178:1-17.
- Chinese Science Bulletin. 57: 3740-3747. doi: 10.1007/s11434-012-5353-2