Lower Cambrian Vendobionts from China and Early Diploblast Evolution

  title={Lower Cambrian Vendobionts from China and Early Diploblast Evolution},
  author={De-gan Shu and Simon Conway Morris and J. Han and Y. Li and X-L. Zhang and Hong Hua and Z.-F. Zhang and J.-N. Liu and Junfeng Guo and Y. Yao and Kinya Yasui},
  pages={731 - 734}
Ediacaran assemblages immediately predate the Cambrian explosion of metazoans and should have played a crucial role in this radiation. Their wider relationships, however, have remained refractory and difficult to integrate with early metazoan phylogeny. Here, we describe a frondlike fossil, Stromatoveris (S. psygmoglena sp. nov.), from the Lower Cambrian Chengjiang Lagerstätte (Yunnan, China) that is strikingly similar to Ediacaran vendobionts. The exquisite preservation reveals closely spaced… 

A stem-group cnidarian described from the mid-Cambrian of China and its significance for cnidarian evolution

Palaeontological data of extinct groups often sheds light on the evolutionary sequences leading to extant groups, but has failed to resolve the basal metazoan phylogeny including the origin of the

Integrated Evolution of Cnidarians and Oceanic Geochemistry Before and During the Cambrian Explosion

Molecular phylogenetic analysis reveals that the splitting of the phylum Cnidaria into Anthozoa and Medusozoa probably took place in deep time as early as Cryogenian–Ediacaran (720–635 Ma), a long

Raman spectra of a Lower Cambrian ctenophore embryo from southwestern Shaanxi, China

The oldest ctenophore and the only embryonic comb jelly known from the fossil record, this exceptionally well preserved specimen provides important clues about the early evolution of the phylum Ctenophora and of metazoans in general.

Origin and early diversification of the phylum Cnidaria Verrill: major developments in the analysis of the taxon's Proterozoic–Cambrian history

Diploblastic eumetazoans of the phylum Cnidaria originated during the Neoproterozoic Era, possibly during the Cryogenian Period. The oldest known fossil cnidarians occur in strata of Ediacaran age

Ctenophores: an evolutionary-developmental perspective.

Eoandromeda and the origin of Ctenophora

The Ediacaran fossil Eoandromeda octobrachiata had a high conical body with eight arms in helicospiral arrangement along the flanks, and was interpreted as an early stem‐group ctenophore, characterized by the synapomorphies ctenes, comb rows, and octoradial symmetry but lacking crown‐group synapomorphicies.

Tiny Sea Anemone from the Lower Cambrian of China

The features found in the present fossils fall within the morphological spectrum of modern Hexacorallia excluding Ceriantharia, and thus Eolympia pediculata could be a stem member for this group.

Chapter 19 – The Cambrian Period

Three Cambrian fossils assembled into an extinct body plan of cnidarian affinity

It is demonstrated that X. sinica possessed a polypoid body, a blind gastric cavity partitioned by septum-like structures, a holdfast that contained an additional cavity functioning as a hydroskeleton, a basal pit used for anchorage, and a radial whorl of feather-like tentacles for ciliary suspension feeding.

Cambrian petalonamid Stromatoveris phylogenetically links Ediacaran biota to later animals

It follows that petalonamids remained an important component of Cambrian marine ecosystems and that the metazoan radiation can be dated to a minimum age of between 558 and 571 myr.



The Phylum Vendobionta: a sister group of the Eumetazoa?

It is hypothesized that the Vendobionta are cnidarian-like organisms that lacked cnidae, and this analysis differs from existing interpretations of the Ediacaran fossils as ancestors of extant cNidarians in that it does not regard any of these forms as either polypoid or medusoid.

The Late Precambrian fossil Kimberella is a mollusc-like bilaterian organism

This work reconstructs Kimberella as a bilaterally symmetrical, benthic animal with a non-mineralized, univalved shell, resembling a mollusc in many respects, important evidence for the existence of large triploblastic metazoans in the Precambrian and indicates that the origin of the higher groups of protostomes lies well back in the precambrian.

Vendobionta and Psammocorallia: lost constructions of Precambrian evolution

  • A. Seilacher
  • Environmental Science
    Journal of the Geological Society
  • 1992
The non-availability of biomineralized skeletons and low levels of predation led Vendian evolution along strange avenues. The Ediacara-type Vendobionta appear to represent a kingdom, in which foliate

Long expected sponges from the Neoproterozoic Ediacara fauna of South Australia

New fossils from the Neoproterozoic Ediacara fauna of South Australia are interpreted as the oldest known hexactinellid sponges. They occur within the Ediacara Member of the Rawnsley Quartzite (Pound

Ediacara-type fossils in Cambrian sediments

Fossil assemblages that preserve soft-bodied organisms are essential for our understanding of the composition and diversity of past life. The worldwide terminal Proterozoic Ediacara-type fossils

Conulariid–like fossil from the Vendian of Russia: a metazoan clade across the Proterozoic/Palaeozoic boundary

A conulariid–like fossil is described for the first time from Upper Vendian (late Neoproterozoic) deposits. Vendoconularia triradiata gen. et sp. nov. is found with other fossils in poorly cemented,

THE EDIACARA BIOTA: Neoproterozoic Origin of Animals and Their Ecosystems

Present evidence suggests that the Ediacara biota included a mixture of stem- and crown-group radial animals, stem-group bilaterian animals, “failed experiments” in animal evolution, and perhaps representatives of other eukaryotic kingdoms.

Modular Construction of Early Ediacaran Complex Life Forms

Newly discovered, exceptionally preserved, soft-bodied fossils near Spaniard's Bay in eastern Newfoundland exhibit features not previously described from Ediacaran (terminal Neoproterozoic) fossils.

A molecular phylogenetic framework for the phylum Ctenophora using 18S rRNA genes.

The first molecular phylogenetic analysis of the phylum Ctenophora, by use of 18S ribosomal RNA sequences from most of the major taxa, suggests that the ctenophores form a distinct monophyletic group that is most closely related to the cnidarians.

Placozoa are not derived cnidarians: evidence from molecular morphology.

The new molecular morphological characters provide compelling evidence that Trichoplax is not a derived (medusozoan) cnidarian, and it was found that the mitochondrial genome in Cubozoa consists of four linear molecules instead of a single circular molecule or two linear molecules, suggesting that the cubozoans may represent the most derived cNidarian group.