User:Ashorocetus/sandbox/Spheroolithidae

Ashorocetus/sandbox/Spheroolithidae; Temporal range: Cretaceous PreꞒ Ꞓ O S D C P T J K Pg N
	Spheroolithus eggs from China
Egg fossil classification
Basic shell type:	†Dinosauroid-spherulitic
Oofamily:	†Spheroolithidae

Spheroolithidae is an oofamily of fossil dinosaur eggs.

Description[edit]

Spheroolithids are usually medium to large in size. As their name suggests, they are usually roughly spherical, though they can be up to 30% longer than their width. They can often be difficult to classify, because egg shape can vary within a single clutch, and eggshell thickness can vary significantly in a single egg.^[1]

History[edit]

The oofamily was first named by Zhao Zikui in 1979, at which time he included three oogenera in it: Spheroolithus, Paraspheroolithus, and Ovaloolithus.^[2]

^ Cite error: The named reference Mikhailov 1997 was invoked but never defined (see the help page).
^ Zhao, Zikui (1979). "Progress in the Research of Dinosaur Eggs". Mesozoic and Cenozoic Red Beds of South China (in Chinese). Science Press. pp. 330–340. {{cite book}}: External link in |chapter= (help)

[Mikhailov_1997-1] Cite error: The named reference Mikhailov 1997 was invoked but never defined (see the help page).

[Zhao_1979-2] Zhao, Zikui (1979). "Progress in the Research of Dinosaur Eggs". Mesozoic and Cenozoic Red Beds of South China (in Chinese). Science Press. pp. 330–340. {{cite book}}: External link in |chapter= (help)

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