Ciliated protozoans from the Precambrian Doushantuo Formation, Wengan, South China

  title={Ciliated protozoans from the Precambrian Doushantuo Formation, Wengan, South China},
  author={CHIA-WEI Li and Jy Chen and Jere H. Lipps and Feng Gao and Huimei Chi and H.-J. Wu},
Abstract Ciliates, a major eukaryotic crown-group lineage with thousands of living species, are poorly represented in the fossil record. Ciliate biomarkers are known from the Precambrian, but only one group, the tintinnids, have an extensive fossil record dating back to the Ordovician. Thus, the occurrence of probable ciliate body fossils in Neoproterozoic rocks confirms their earlier appearance, so far inferred only from molecular sequence data and biomarkers. In this paper, we describe those… 

Figures from this paper

Ciliates — Protists with complex morphologies and ambiguous early fossil record

Oldest fossil ciliates from the Cryogenian glacial interlude reinterpreted as possible red algal spores

The Cryogenian Period experienced two long lived global glaciations known as Snowball Earths. While these events were dramatic, eukaryotic life persisted through them, and fossil evidence shows that

Reassessment of the Putative Ciliate Fossils Eotintinnopsis, Wujiangella, and Yonyangella from the Neoproterozoic Doushantuo Formation in China

It is suggested that these three putative ciliate fossils from the Neoproterozoic Doushantuo Formation in China are likely to be taphonomically and diagenetically distorted and altered acritarchs.

Diversification of heterotrophic protists at the eve of Cambrian explosion

Putative Cryogenian ciliates from Mongolia

Eukaryotes forming recalcitrant organic or mineral-rich tests before 635 Ma may have increased export and burial fraction of organic carbon, driving an increase in atmospheric oxygen and the subsequent radiation of metazoans.

The Weng'an biota and the Ediacaran radiation of multicellular eukaryotes

Megasphaera is a multicellular eukaryote with evidence for cell-to-cell adhesion, a flexible membrane unconstrained by a rigid cell wall, spatial cellular differentiation, germ-soma separation, and programmed cell death.

Ediacaran Acanthomorphic Acritarchs and Other Microfossils From Chert Nodules of the Upper Doushantuo Formation In the Yangtze Gorges Area, South China

It is proposed that the first occurrence of Hocosphaeridium anozos, a species with easily recognizable morphology and wide taphonomic and geographic distributions, be used to define the second Doushantuo acanthomorph biozone succeeding the Tianzhushania spinosa biozone.

Estimation of divergence times in litostomatean ciliates (Ciliophora: Intramacronucleata), using Bayesian relaxed clock and 18S rRNA gene

To understand diversification dynamic of litostomateans, divergence times of their main groups were estimated with the Bayesian molecular dating, a technique allowing relaxation of molecular clock and incorporation of flexible calibration points.



Precambrian animal life: probable developmental and adult cnidarian forms from Southwest China.

The new observations reported in this paper indicate the existence of a diverse and already differentiated cnidarian fauna, long before the Cambrian evolutionary event.

Eumetazoan fossils in terminal proterozoic phosphorites?

  • S. XiaoX. YuanA. Knoll
  • Geography, Environmental Science
    Proceedings of the National Academy of Sciences of the United States of America
  • 2000
Evidence for Doushantuo eumetazoans is provided by millimeter-scale tubes that display tabulation and apical budding characteristic of some Cnidaria, especially the extinct tabulates.

Precambrian sponges with cellular structures

The fauna indicates that animals lived 40 to 50 million years before the Cambrian Explosion, and the presence of possible amphiblastula larva suggests that the calcareous sponges may have an extended history in the Late Precambrian.

Precambrian animal diversity: putative phosphatized embryos from the Doushantuo Formation of China.

Putative fossil embryos and larvae from the Precambrian phosphorite rocks of the Doushantuo Formation in Southwest China have been examined in thin section and identified what appear to be modern cnidarian developmental stages, including both anthozoan planula larvae and hydrozoan embryos.

Doushantuo Fossils: Life on the Eve of Animal Radiation

  • Zhe‐Xi Luo
  • Environmental Science
    Journal of Paleontology
  • 2005
This book on the Doushantuo fossils provides a timely review of a topic that is inherently interesting to all who care about the early evolution of life.

Three-dimensional preservation of algae and animal embryos in a Neoproterozoic phosphorite

Embryos preserved in early cleavage stages indicate that the divergence of lineages leading to bilaterians may have occurred well before their macroscopic traces or body fossils appear in the geological record.

Microzooplankton diversity : relationships of tintinnid ciliates with resources , competitors and predators from the Atlantic Coast of Morocco to the Eastern Mediterranean

We examined tintinnid (loricate ciliate microzooplankton) diversity using data from 11 stations between the Moroccan upwelling system and the oligotrophic Eastern Mediterranean. Taxonomic and