Evidence for Monophyly and Arthropod Affinity of Cambrian Giant Predators

@article{Chen1994EvidenceFM,
  title={Evidence for Monophyly and Arthropod Affinity of Cambrian Giant Predators},
  author={Jun-yuan Chen and Lars Ramsk�ld and Gui-qing Zhou},
  journal={Science},
  year={1994},
  volume={264},
  pages={1304 - 1308}
}
The Chinese Early Cambrian Chengjiang fauna includes three different anomalocaridids, a globally spread, extinct marine group including the largest known Cambrian animals. Anomalocaridids were active predators, and their presence implies that a complex ecosystem appeared abruptly in the earliest Phanerozoic. Complete specimens display several sets of characters shared only with some other exclusively Cambrian forms. This evidence indicates that anomalocaridids, Opabinia, and Kerygmachela form a… 
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A fossil arthropod similar to Fuxianhuia and displaying an exceptionally well–preserved alimentary canal with in situ gut contents is reported from the lower Middle Cambrian of South China, augments the small number of previously described associations providing more or less direct evidence of predator–prey relationships in Cambrian epibenthic communities.
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The specimen represents the oldest microanatomical evidence confirming the occurrence of highly developed vision in the early Cambrian, over 2,000 ommatidia in each eye, and supports the hypothesis that the origin and evolution of ‘good vision' was a key trait that promoted preferential diversification and formed the foundation of modern benthic ecosystems in theEarly Cambrian ocean.
A NEW EARLY CAMBRIAN ONYCHOPHORAN-LIKE ANIMAL, PAUCIPODIA GEN-NOV, FROM THE CHENGJIANG FAUNA, CHINA
An onychophoran-like fossil animal, Paucipodia inermis gen. et sp. nov., is described from the Lower Cambrian Chengjiang lagerstatte in Yunnan, China. The animal was soft-bodied, and possessed six…
A giant Ordovician anomalocaridid
TLDR
Phylogenetic analyses support a position of anomalocaridids in the arthropod stem, as a sister group to the euarthropods, and confirm the presence of a dorsal array of flexible blades attached to a transverse rachis on the trunk segments.
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