A Parvancorina-like arthropod from the Cambrian of South China

@article{Lin2006APA,
  title={A Parvancorina-like arthropod from the Cambrian of South China},
  author={Jih-Pai Lin and Samuel M. Gon and James G. Gehling and Loren E. Babcock and Yuan-long Zhao and Xingliang Zhang and Shi-xue Hu and Jinliang Yuan and Meiyi Yu and Jin Peng},
  journal={Historical Biology},
  year={2006},
  volume={18},
  pages={33 - 45}
}
Constraining the origin of animal groups is allowed, to some extent, by discoveries of Cambrian Lagerstätten that preserve both mineralizing and nonmineralizing organisms. A new species is reported here of the Cambrian arthropod Skania, which bears an exoskeleton that shares homologies with the Neoproterozoic (Ediacaran) organism Parvancorina and firmly establishes a Precambrian root for arthropods. A new monophyletic group, Parvancorinomorpha, is proposed as the first clade within the… 

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References

SHOWING 1-10 OF 152 REFERENCES

Phylogenetic Hypotheses of the Relationships of Arthropods to Precambrian and Cambrian Problematic Fossil Taxa

TLDR
A morphological cladistic analysis of seven Vendian "arthropodlike" taxa compared with 21 representative Cambrian arthropods, lobopods, and weird wonders finds no compelling reason to accept the hypothesis that the Vendian organisms included here are not metazoans.

The phylogeny of arachnomorph arthropods and the origin of the Chelicerata

TLDR
The present study provides a detailed discussion of primary hypotheses of homology and includes a more complete range of terminal taxa than previous analyses, and provides the first convincing synapomorphies for the Arachnomorpha.

The origin of animal phyla and the new phylum Procoelomata

TLDR
Since protostomian features such as a ciliated locomotory sole and a pelagic larva with ciliary bands are widely distributed in branches of the phylogenetic tree, they must have been present in the stem of the tree and helps explain how segmentation, oligomery and non-segmentation could evolve repeatedly in derived groups.

A NEW LATE SILURIAN (PRIDOLIAN) NARAOIID (EUARTHROPODA: NEKTASPIDA) FROM THE BERTIE FORMATION OF SOUTHERN ONTARIO, CANADA—DELAYED FALLOUT FROM THE CAMBRIAN EXPLOSION

Abstract The discovery of a new naraoiid nektaspid in the Upper Silurian (Pridolian) of southeastern Ontario significantly extends the range of this unusual group. Nektaspids are nonmineralized

Through a glass darkly: taxonomy, phylogeny, and biostratigraphy of the Olenellina

TLDR
Biostratigraphic and biogeographic analysis of the Olenellina suggests increasing geographic isolation of Laurentia during Early Cambrian time and that LaurentianOlenellidae are mostly younger than the Olanellina of the other Cambrian continents.

Anomalocaris predation on nonmineralized and mineralized trilobites

  • C. Nedin
  • Environmental Science, Geography
  • 1999
TLDR
Variation in the frontal appendages of anomalocaridids indicates that niche partitioning within the genus was well established by the late Early Cambrian and allows durophagous predation on nonbiomineralized individuals.

Reconsideration of the supposed naraoiid larva from the Early Cambrian Chengjiang Lagerstätte, South China

The Chengjiang Lagerstätte in the Lower Cambrian of South China yields a small, larva‐like arthropod, which was considered to be a protaspis of naraoiids by many authors. The discovery of a large

Composition and preservation of the Chengjiang fauna –a Lower Cambrian soft‐bodied biota

The Lower Cambrian Chengjiang fauna is reviewed and shown to be closely comparable with the younger Burgess Shale fauna. but with various differences in detail. A diverse group of more or less

A uniquely preserved Ediacaran fossil with direct evidence for a quilted bodyplan.

TLDR
An Ediacara form, uniquely preserved in situ and in three dimensions with its organic walls cast by early diagenetic calcite, from bituminous limestone of the 551- to 542-mega-annum Dengying Formation of South China is reported, which probably lived procumbently at or near the water-sediment interface and shows evidence for substrate utilization.

Diversification of the Metazoa: Ediacarans, colonies, and the origin of eumetazoan complexity by nested modularity

TLDR
It is argued that the Ediacarans constitute a broad, megascopic, paraphyletic grade of organization which overlaps the stem groups (and perhaps some crown groups) of the Porifera, Ctenophora, Cnidaria and Bilateria, and suggests that they were fundamentally colonial organisms.
...