Faveoloolithidae is an

oofamily Egg fossils are the fossilized remains of eggs laid by ancient animals. As evidence of the physiological processes of an animal, egg fossils are considered a type of trace fossil. Under rare circumstances a fossil egg may preserve the remains of t ...

dinosaur eggs Dinosaur eggs are the organic vessels in which a dinosaur embryo develops. When the first scientifically documented remains of non-avian dinosaurs were being described in England during the 1820s, it was presumed that dinosaurs had laid eggs bec ...

. It contains ''

Faveoloolithus ''Faveoolithus'' is an oogenus of dinosaur egg. The oogenus contains two oospecies, ''F. ningxiaensis'' and ''F. zhangi''.Hemifaveoloolithus ''Hemifaveoloolithus'' is an oogenus of fossil dinosaur egg from the Tiantai basin in Zhejiang Province, China. It is a faveoloolithid, having spherical eggs roughly 13 cm in diameter. The shell is distinctive for being composed of four o ...

'', ''

Parafaveoloolithus ''Parafaveoloolithus'' is an oogenus of Faveoloolithid fossil egg, known from the Cretaceous of China.Zhang, S.K. 2010A parataxonomic revision of the Cretaceous faveoloolithid eggs of China ''Vertebrata PalAsiatica'' 48(3):203-219 Description ' ...

'', and probably ''

Sphaerovum ''Sphaerovum'' is an oogenus of dinosaur egg that has only been discovered in South America. History ''Sphaerovum'' was first described, along with '' Tacuarembovum'', in 1980 by paleontologist Alvaro Mones, following their discovery at the A ...

''. However, unlike the other Faveoloolthids, ''Sphaerovum'' has compactituberculate ornamentation more similar to megaloolithids. Like Dictyoolithidae, the membrane and the

calcareous Calcareous () is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines. In zoology ''Calcareous'' is used as an a ...

part of the eggshell formed simultaneously instead of forming the membrane before the calcareous like modern

bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweig ...

s.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.

References

Egg fossils {{dinosaur-stub

See also

References