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Spheroolithidae

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Spheroolithidae
Temporal range: Early – Late Cretaceous
~136–66  Ma
Academy of Natural Sciences, Philadelphia - IMG 7443.JPG
Spheroolithus eggs from China
Egg fossil classification OOjs UI icon edit-ltr.svg
Basic shell type:† Dinosauroid-spherulitic
Oofamily:† Spheroolithidae
Oogenera

Spheroolithidae is an oofamily of dinosaur eggs. It contains Guegoolithus , Spheroolithus , and Paraspheroolithus . [1] Like modern birds, the eggshell membrane formed before the calcareous part of the shell. [2]

See also

References

  1. ↑ Moreno-Azanza, M.; Canudo, J.I.; Gasca, J.M. (2014). "Spheroolithid eggshells in the Lower Cretaceous of Europe. Implications for eggshell evolution in ornithischian dinosaurs" (PDF). Cretaceous Research . 51: 75–87. doi:10.1016/j.cretres.2014.05.017.
  2. ↑ Z.-K. Zhao. (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. Cambridge. pp. 184–203.
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