About: Cambrian chordates

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The Cambrian chordates are an extinct group of animals belonging to the phylum Chordata that lived during the Cambrian, between 485 and 538 million years ago. The first Cambrian chordate known is Pikaia gracilens, a lancelet-like animal from the Burgess Shale in British Columbia, Canada. The discoverer, Charles Doolittle Walcott, described it as a kind of worm (annelid) in 1911, but was later realised to be a chordate. Since the discovery of other Cambrian fossils from the Burgess Shale in 1991, and from the Chengjiang biota of China in 1991, which were later found to be of chordates, several Cambrian chordates are known, with some fossils considered as putative chordates.

Attributes	Values
rdfs:label	Cambrian chordates (en)
rdfs:comment	The Cambrian chordates are an extinct group of animals belonging to the phylum Chordata that lived during the Cambrian, between 485 and 538 million years ago. The first Cambrian chordate known is Pikaia gracilens, a lancelet-like animal from the Burgess Shale in British Columbia, Canada. The discoverer, Charles Doolittle Walcott, described it as a kind of worm (annelid) in 1911, but was later realised to be a chordate. Since the discovery of other Cambrian fossils from the Burgess Shale in 1991, and from the Chengjiang biota of China in 1991, which were later found to be of chordates, several Cambrian chordates are known, with some fossils considered as putative chordates. (en)
foaf:depiction
dcterms:subject	Paleontology in British Columbia Chordates Cambrian fossil record Paleontology in Yunnan Burgess Shale fossils Cambrian China Cambrian first appearances Maotianshan shales fossils Cambrian chordates
Wikipage page ID	71816171 (xsd:integer)
Wikipage revision ID	1118515590 (xsd:integer)
Link from a Wikipage to another Wikipage	Cambrian Cambrian explosion Scientific American Basal (phylogenetics) Deuterostome Paleontology in British Columbia University of Cambridge Integument Nostril Craniate Gnathostomata Annelid Chordates Chordata Simon Conway Morris Stephen Jay Gould Yunnan Yunnanozoon Zhongxiniscus Hemichordata Pharynx British Columbia Burgess Shale Cathaymyrus Cambrian fossil record Alberta Fin Notochord Haikouella Harry B. Whittington Paleontology in Yunnan Arthropods Burgess Shale fossils Cambrian China Cambrian first appearances Maotianshan shales fossils Charles Doolittle Walcott Chengjiang County China Chinese Academy of Sciences Chordate Lancelet Skeletal muscles Digestive tract Aschelminth Cambrian chordates Maotianshan Shales Pika Peak Metaspriggina National Museum of Natural History Cartilage Shankouclava Synonym (taxonomy) Skull Myomere Parapodia University of Camerino Polychaeta Swedish Museum of Natural History Vertebrates Wonderful Life: The Burgess Shale and the Nature of History Chengjiang biota Pikaia gracilens Zhongjianichthys rostratus Myllokunmingia fengjiaoa Ventral fin Vetulicolians
sameAs	Cambrian chordates Cambrian chordates
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thumbnail	wiki-commons:Special:FilePath/Charles_Doolittle_Walcott_with_Workers.jpg?width=300
has abstract	The Cambrian chordates are an extinct group of animals belonging to the phylum Chordata that lived during the Cambrian, between 485 and 538 million years ago. The first Cambrian chordate known is Pikaia gracilens, a lancelet-like animal from the Burgess Shale in British Columbia, Canada. The discoverer, Charles Doolittle Walcott, described it as a kind of worm (annelid) in 1911, but was later realised to be a chordate. Since the discovery of other Cambrian fossils from the Burgess Shale in 1991, and from the Chengjiang biota of China in 1991, which were later found to be of chordates, several Cambrian chordates are known, with some fossils considered as putative chordates. The Cambrian chordates are characterised by the presence of segmented muscle blocks called myomeres and notochord, the two defining features of chordates. Before the full understanding of Cambrian fossils, chordates as members the most advanced phylum were believed to appear on Earth much later than the Cambrian. However, the better picture of Cambrian explosion in the light of Cambrian chordates, according to Stephen Jay Gould, prompted "revised views of evolution, ecology and development," and remarked: "So much for chordate uniqueness marked by slightly later evolution." (en)
prov:wasDerivedFrom	wikipedia-en:Cambrian_chordates?oldid=1118515590&ns=0

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