Linked from
The 8 pages that link to Yixian Formation, each with the reason it gives.
ConfuciusornisRelated: Its deposits have yielded important Confuciusornis specimens.
EomaiaRelated: Eomaia was recovered from this fossil-rich formation.
RepenomamusRelated: Fossils of Repenomamus and its prey come from this formation.
YutyrannusRelated: Yutyrannus specimens were recovered from deposits assigned to this formation.
IncisivosaurusRelated: The type specimen was recovered from this fossil-bearing formation.