Paleobiota of the Yixian Formation

The Yixian Formation () is a geological formation in Jinzhou, Liaoning, People's Republic of China, that spans about 5 million years during the early Cretaceous period (early Aptian stage). It is known for its fossils, listed below.
The Yixian Formation is divided into the following subunits: (ages from Chang et al., 2009 unless otherwise noted)
Ornithischians.
The dinosaurs listed below were compiled in a survey by Xu and Norell in 2006, unless otherwise noted.
Theropods.
The dinosaurs listed below were compiled in a survey by Xu and Norell in 2006, unless otherwise noted.
Pterosaurs.
The pterosaurs listed below were compiled in a survey by Wang and Zhou in 2006, unless otherwise noted.
Mammals.
The mammals listed below were compiled in a survey by Meng and colleagues in 2006, unless otherwise noted.
Invertebrate fauna of the Yixian Formation.
The invertebrate species listed below follow a survey by Chen and colleagues published in 2005, unless otherwise noted.
Arachnids.
The arachnid species listed below follow a catalogue compiled by Dunlop, Penney and Jekel in 2010, unless otherwise noted.
Dragonflies (Odonata).
The dragonfly species listed below follow a review compiled by Zhang, Ren and Panf in 2008, unless otherwise noted.
Flora of the Yixian Formation.
Conifers.
The coniferous trees and shrubs listed below were compiled in a survey by Wang and colleagues in 2006, unless otherwise noted.