Medioolithus is an oogenus of fossil egg laid by a paleognath.[1]

Medioolithus
Temporal range: Early Eocene
Egg fossil classification Edit this classification
Basic shell type: Ornithoid
Morphotype: Ornithoid-ratite
Oofamily: Medioolithidae
Oogenus: Medioolithus
Kohring & Hirsch, 1996
Oospecies
  • M. geiseltalensis

Description

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Medioolithus is known several eggshell fragments, and one complete, spherical egg. M. geiseltalensis is very similar to modern ratite eggs, for example those of ostriches, rheas, and cassowaries. At 9 cm (3.5 in) in diameter, however, it is smaller than the eggs of any of these birds, being more similar in size to the egg of a kiwi.[1]

References

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  1. ^ a b Kohring, R., & Hirsch, K. F. (1996). "Crocodilian and avian eggshells from the Middle Eocene of the Geiseltal, Eastern Germany." Journal of Vertebrate Paleontology, 16(1), 67-80.