''Shuiyousphaeridium'' is an extinct genus of

acritarch Acritarchs () are organic microfossils, known from the Precambrian to the present. The classification is a catch all term used to refer to any organic microfossils that cannot be assigned to other groups. Their diversity reflects major ecolog ...

discovered in 1993. Dated to 1.8Ga, it represents one of the earliest fossil

eukaryote The eukaryotes ( ) constitute the Domain (biology), domain of Eukaryota or Eukarya, organisms whose Cell (biology), cells have a membrane-bound cell nucleus, nucleus. All animals, plants, Fungus, fungi, seaweeds, and many unicellular organisms ...

taxa. It is found in the Changcheng System and the Ruyang Group of China.

References

Acritarch genera {{eukaryote-stub