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New observations on the most mineralized brachiopod Diandongia from the Chengjiang Lagerstätte (Cambrian, Stage 3) of eastern Yunnan, China
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology. Northwest University, China.
Northwest University, China.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
Northwest University, China.
(English)Manuscript (preprint) (Other academic)
Keyword [en]
Lower Cambrian, Brachiopoda, Linguliformea, Botsfordiidae
National Category
Geology
Research subject
Earth Science with specialization in Historical Geology and Palaeontology
Identifiers
URN: urn:nbn:se:uu:diva-234840OAI: oai:DiVA.org:uu-234840DiVA: diva2:757956
Available from: 2014-10-24 Created: 2014-10-24 Last updated: 2015-02-03
In thesis
1. Origin and Lifestyles of early Brachiopods and other Lophotrochozoans: Insights from the Chengjiang and Guanshan Fossil-Lagerstätten
Open this publication in new window or tab >>Origin and Lifestyles of early Brachiopods and other Lophotrochozoans: Insights from the Chengjiang and Guanshan Fossil-Lagerstätten
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

One of the great unsolved evolutionary questions concerns the origin and phylogeny of the major animal phyla that appeared in the fossil record more than 540 million years ago, during the Cambrian explosion. Although new molecular information has been very useful, we still have little understanding about the origin of most of the phyla of bilaterians living today. The richly diverse fossil remains from this critical early Cambrian interval are particularly well exposed in China, where exceptionally-preserved fossil lophotrochozoans including brachiopods are particularly abundant. In particular the exceptionally-preserved Cambrian lophophorates from the Chengjiang and Guanshan Lagerstätten have offered new sources of critical palaeobiological data that have been shown to be important for understanding the early ecology and evolution of lophotrochozoans. This thesis comprises a detailed study of new, abundant, exceptionally-preserved material of five lophotrochozoan species from the Chengjiang and Guanshan Lagerstätten. Kuangshanotreta malungensis from Chengjiang is the earliest known example of an attached acrotretoid brachiopod representing the oldest evidence about the palaeoecology of the diverse yet, enigmatic acrotretoid linguliform stock that comprises an important component of the Cambrian evolutionary fauna. Eoglossa chengjiangensis from Chengjiang is the earliest known representative of the Glossellinae. Diandongia pista occurs abundantly both in the Chengjiang fauna and the younger Guanshan fauna, and it’s exceptionally well-preserved and strongly mineralized shells shows that it belongs within the Botsfordiidae. In contrast, the last two species from Chengjiang examined for this thesis - Yuganotheca elegans and Cotyledion tylodes belong within the stem of the Brachiopoda and the Lophotrochozoan entoprocts.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2014
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1198
Keyword
Cambrian Explosion, Chengjiang, Guanshan, Lagerstätten, Lophotrochozoa, Brachiopoda
National Category
Geology Other Earth and Related Environmental Sciences
Research subject
Earth Science with specialization in Historical Geology and Palaeontology
Identifiers
urn:nbn:se:uu:diva-234843 (URN)978-91-554-9092-8 (ISBN)
Public defence
2014-12-12, Axel Hambergsalen, Geocentrum, Villavägen 16, Uppsala, 10:00 (English)
Opponent
Supervisors
Available from: 2014-11-20 Created: 2014-10-24 Last updated: 2015-02-03

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Wang, Haizhou

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