Macroscopic carbonaceous compressions in a terminal Proterozoic shale: A systematic reassessment of the Miaohe biota, south China
Carbonaccous compression fossils in shales of the uppermost Doushantuo Formation (ca. 555-590 Ma) at Miaohe in the Yangtze Gorges area provide a rare Burgess-Shale-type taphonomic window on terminal Proterozoic biology. More than 100 macrofossil species have been described from Miaolte shales, but i...
Main Authors: | , , , |
---|---|
Format: | Report |
Language: | English |
Published: |
PALEONTOLOGICAL SOC INC
2002
|
Subjects: | |
Online Access: | http://ir.nigpas.ac.cn/handle/332004/22031 |
id |
ftchinacscnigpas:oai:ir.nigpas.ac.cn:332004/22031 |
---|---|
record_format |
openpolar |
spelling |
ftchinacscnigpas:oai:ir.nigpas.ac.cn:332004/22031 2023-05-15T15:35:27+02:00 Macroscopic carbonaceous compressions in a terminal Proterozoic shale: A systematic reassessment of the Miaohe biota, south China Xiao, SH Yuan, XL Steiner, M Knoll, AH 2002-03-01 http://ir.nigpas.ac.cn/handle/332004/22031 英语 eng PALEONTOLOGICAL SOC INC JOURNAL OF PALEONTOLOGY http://ir.nigpas.ac.cn/handle/332004/22031 NEOPROTEROZOIC DOUSHANTUO FORMATION BURGESS-SHALE FOSSIL PRESERVATION CAMBRIAN EXPLOSION METAZOAN PHYLA ANIMAL EMBRYOS BAFFIN ISLAND MICROFOSSILS EVOLUTION MEGAFOSSILS Paleontology 期刊论文 2002 ftchinacscnigpas 2019-08-14T12:45:11Z Carbonaccous compression fossils in shales of the uppermost Doushantuo Formation (ca. 555-590 Ma) at Miaohe in the Yangtze Gorges area provide a rare Burgess-Shale-type taphonomic window on terminal Proterozoic biology. More than 100 macrofossil species have been described from Miaolte shales, but in an examination of published and new materials, we recognize only about twenty distinct taxa, including Aggregatosphaera miaoheensis new gen. and sp. Most of these fossils can be interpreted unambiguously as colonial prokaryotes or multicellular algae. Phylogenetically derived coenocytic green algae appear to be present, as do regularly bifurcating thalli comparable to red and brown algae. At least five species have been interpreted as metazoans by previous workers. Of these, Protoconites minor and Calyptrina striata most closely resemble animal remains; either or both could be the organic sheaths of enidarian scyphopolyps, although an algal origin cannot be ruled out for P. minor. Despite exceptional preservation, the Miaohe assemblage contains no macroscopic fossils that can be interpreted with confidence as bilaterian animals. In combination with other late Neoproterozoic and Early Cambrian body fossils and trace fossils, the Doushantuo assemblage supports the view that body-plan diversification within bilaterian phyla was largely a Cambrian event. Report Baffin Island Baffin Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) Baffin Island Burgess ENVELOPE(76.128,76.128,-69.415,-69.415) |
institution |
Open Polar |
collection |
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacscnigpas |
language |
English |
topic |
NEOPROTEROZOIC DOUSHANTUO FORMATION BURGESS-SHALE FOSSIL PRESERVATION CAMBRIAN EXPLOSION METAZOAN PHYLA ANIMAL EMBRYOS BAFFIN ISLAND MICROFOSSILS EVOLUTION MEGAFOSSILS Paleontology |
spellingShingle |
NEOPROTEROZOIC DOUSHANTUO FORMATION BURGESS-SHALE FOSSIL PRESERVATION CAMBRIAN EXPLOSION METAZOAN PHYLA ANIMAL EMBRYOS BAFFIN ISLAND MICROFOSSILS EVOLUTION MEGAFOSSILS Paleontology Xiao, SH Yuan, XL Steiner, M Knoll, AH Macroscopic carbonaceous compressions in a terminal Proterozoic shale: A systematic reassessment of the Miaohe biota, south China |
topic_facet |
NEOPROTEROZOIC DOUSHANTUO FORMATION BURGESS-SHALE FOSSIL PRESERVATION CAMBRIAN EXPLOSION METAZOAN PHYLA ANIMAL EMBRYOS BAFFIN ISLAND MICROFOSSILS EVOLUTION MEGAFOSSILS Paleontology |
description |
Carbonaccous compression fossils in shales of the uppermost Doushantuo Formation (ca. 555-590 Ma) at Miaohe in the Yangtze Gorges area provide a rare Burgess-Shale-type taphonomic window on terminal Proterozoic biology. More than 100 macrofossil species have been described from Miaolte shales, but in an examination of published and new materials, we recognize only about twenty distinct taxa, including Aggregatosphaera miaoheensis new gen. and sp. Most of these fossils can be interpreted unambiguously as colonial prokaryotes or multicellular algae. Phylogenetically derived coenocytic green algae appear to be present, as do regularly bifurcating thalli comparable to red and brown algae. At least five species have been interpreted as metazoans by previous workers. Of these, Protoconites minor and Calyptrina striata most closely resemble animal remains; either or both could be the organic sheaths of enidarian scyphopolyps, although an algal origin cannot be ruled out for P. minor. Despite exceptional preservation, the Miaohe assemblage contains no macroscopic fossils that can be interpreted with confidence as bilaterian animals. In combination with other late Neoproterozoic and Early Cambrian body fossils and trace fossils, the Doushantuo assemblage supports the view that body-plan diversification within bilaterian phyla was largely a Cambrian event. |
format |
Report |
author |
Xiao, SH Yuan, XL Steiner, M Knoll, AH |
author_facet |
Xiao, SH Yuan, XL Steiner, M Knoll, AH |
author_sort |
Xiao, SH |
title |
Macroscopic carbonaceous compressions in a terminal Proterozoic shale: A systematic reassessment of the Miaohe biota, south China |
title_short |
Macroscopic carbonaceous compressions in a terminal Proterozoic shale: A systematic reassessment of the Miaohe biota, south China |
title_full |
Macroscopic carbonaceous compressions in a terminal Proterozoic shale: A systematic reassessment of the Miaohe biota, south China |
title_fullStr |
Macroscopic carbonaceous compressions in a terminal Proterozoic shale: A systematic reassessment of the Miaohe biota, south China |
title_full_unstemmed |
Macroscopic carbonaceous compressions in a terminal Proterozoic shale: A systematic reassessment of the Miaohe biota, south China |
title_sort |
macroscopic carbonaceous compressions in a terminal proterozoic shale: a systematic reassessment of the miaohe biota, south china |
publisher |
PALEONTOLOGICAL SOC INC |
publishDate |
2002 |
url |
http://ir.nigpas.ac.cn/handle/332004/22031 |
long_lat |
ENVELOPE(76.128,76.128,-69.415,-69.415) |
geographic |
Baffin Island Burgess |
geographic_facet |
Baffin Island Burgess |
genre |
Baffin Island Baffin |
genre_facet |
Baffin Island Baffin |
op_relation |
JOURNAL OF PALEONTOLOGY http://ir.nigpas.ac.cn/handle/332004/22031 |
_version_ |
1766365785334218752 |