| Pachycorioolithus Temporal range:
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|---|---|
Egg fossil classification 
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| Oofamily: | †Pachycorioolithidae Lawver et al., 2016 |
| Oogenus: | †Pachycorioolithus Lawver et al., 2016 |
| Oospecies | |
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Pachycorioolithus is an oogenus of small, thin-shelled fossil egg from the early Cretaceous in China. It probably belongs to a bird, though there is a possibility the parent was a non-avian theropod. It was named in 2016, based on a single specimen found in Zhejiang.[1]
- ^ Lawver, Daniel R.; Jin, Xingsheng; Jackson, Frankie D.; Wang, Qiongying (2016). "An Avian Egg from the Lower Cretaceous (Albian) Liangtoutang Formation of Zhejiang Province, China". Journal of Vertebrate Paleontology. 36 (3): e1100631. doi:10.1080/02724634.2016.1100631.