Phaceloolithus
| Phaceloolithus Temporal range:
| |
|---|---|
Egg fossil classification 
| |
| Basic shell type: | †Dinosauroid-spherulitic |
| Oofamily: | †Phaceloolithidae Zeng & Zhang, 1979 |
| Oogenus: | †Phaceloolithus Zeng & Zhang, 1979 |
| Oospecies | |
Phaceloolithus is an
Distribution
Phaceloolithus is found at the Dongting Basin in Hunan. They are dated, on the basis of other fossil eggs,
Description
Phaceloolithus is nearly spherical, measuring 167–168 mm long and 140–150 mm across. The eggshell is very thin, measuring from 0.5 to 0.7 mm thick.[1] Like most other non-avian dinosaur eggs,[3] Phaceloolithus's shell is stratified into two layers: the prismatic layer on the outside, and the mammillary layer on the inside.[1] The mammillae are compressed into groups of two or three, and the pore canals are well-developed.[1]
History
Phaceloolithus was first described as the sole species of the oofamily Phaceloolithidae in 1979 by Chinese paleontologists Zeng Demin and Zhang Jinjian, following its discovery in the Dongting basin of Hunan.[1]
Parataxonomy
While Phaceloolithus has always been considered an oospecies of Phaceloolithidae, there is dispute about whether or not this oofamily is synonymous with the later-named
See also
- List of dinosaur oogenera
References
- ^ a b c d e f D. Zeng and J. Zhang. (1979). "On the dinosaurian eggs from the western Dongting Basin, Hunan". Vertebrata PalAsiatica 17(2):131–136
- ^ Carpenter, K. (1999). Eggs, Nests, and Baby Dinosaurs: A Look at Dinosaur Reproduction (Life of the Past). Indiana University Press, Bloomington, Indiana.
- UCMP's online fossil egg exhibit.
- ^ Fang, Xiao-si, et al. "Cretaceous fossil eggs from the Tiantai basin of Zhejiang, with a discussion on the extinction of dinosaurs." Geological Bulletin of China 22.7 (2003): 1–24.
- ^ Ribeiro, V., Mateus, O., Holwerda, F., Araújo, R., & Castanhinha, R. (2014). "Two new theropod egg sites from the Late Jurassic Lourinhã Formation, Portugal." Historical Biology, 26(2), 206–217.
- JSTOR 4523773.
- ^ Barta, D. E., Brundridge, K. M., Croghan, J. A., Jackson, F. D., Varricchio, D. J., Jin, X., & Poust, A. W. (2014). "Eggs and clutches of the Spheroolithidae from the Cretaceous Tiantai basin, Zhejiang Province, China." Historical Biology, 26(2), 183–194.
- ^ Barta, D. E. (2014). "A phylogenetic approach to understanding dinosaur egg diversity and the evolution of reproductive traits within Dinosauria" (Master's thesis, Montana State University-Bozeman, College of Letters & Science).
- ^ Fang Xiao-si, Yue Zhao, Ling Hong. (2009). "近十五年来蛋化石研究概况 [Review of the Past 15 years’ Research on Fossil Eggs in China]". 地球学报, 30(4), 523–542.