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Bulletin of Geosciences
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Czech Geological Survey,
W. Bohemia Museum Pilsen
ISSN: 1802-8225 (online),
Ontogeny of the trilobite Estaingia sinensis (Chang) from the Lower Cambrian of South China
Published in: Bulletin of Geosciences, volume 87, issue 1; pages: 151 - 158; Received 3 November 2010; Accepted in revised form 4 October 2011; Online 2 February 2012
Keywords: Trilobita, Estaingia, ontogeny, Cambrian, South China,
AbstractNew material collected from black shale of the Lower Cambrian Shuijingtuo Formation in the Changyang County of Hubei Province, South China, allows a study on morphology and ontogeny of the trilobite Estaingia sinensis (Chang, 1953). Two protaspid stages can be defined on the basis of numerous well-preserved complete specimens, and subsequent ontogenetic stages are described largely based on the cranidia, which reveal prominent morphological changes such as the shortening of the frontal glabellar lobe, disappearance of the fixigenal spine and transformation of facial suture from proparian to opisthoparian
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