Miaolingian

The Miaolingian is the third Series of the Cambrian period, and was formally named in 2018. It lasted from about to million years ago and is divided in ascending order into 3 stages: the Wuliuan, Drumian, and Guzhangian. The Miaolingian is preceded by the unnamed Cambrian Series 2 and succeeded by the Furongian series.
Definition.
A number of proposals for fossils and type sections were made before it was formally ratified in 2018. The most promising fossil markers were seen to be the respective first appearances of either trilobite species "Ovatoryctocara granulata" or "Oryctocephalus indicus", which both have an age close to million years ago. After some deliberation, the FAD of "Oryctocephalus indicus" was chosen to be the lower boundary marker, and the GSSP was placed in Wuliu-Zengjiayan, Guizhou, China.
The Miaolingian-Furongian boundary has the same definition as the Paibian stage. It is defined as the first appearance of "Glyptagnostus reticulatus" around million years ago.
Subdivision.
The Miaolingian is subdivided into the following stages: