Occurrence ofByronia
Matthew andSphenothallus
Hall in the Lower Cambrian of China |
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Authors: | Mao-yan Zhu Heyo Van Iten Robt S Cox Yuan-long Zhao Bernd-D Erdtmann |
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Institution: | 1. Nanjing Institute of Geology and Palaeontology, Academia Sinica, 210008, Nanjing, People’s Republic of China 2. Department of Geology, Hanover College, 47243, Hanover, Indiana, USA 3. Department of Geological Sciences, University of Michigan, 48109, Ann Arbor, Michigan, USA 4. Guizhou Institute of Technology, 550003, Guiyang, People’s Republic of China 5. Bernd-D. Erdtmann, Technische Universit?t Berlin, EB 10, Ernst-Reuter-Platz 1, 10587, Berlin, Germany
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Abstract: | Rare phosphatic tubular fossils from the Lower-Middle Cambrian Kaili Formation of Guizhou Province, southern China were originally identified as non-calcified algae or ‘worms’ (ScoleciellusLiu). Re-examination of these fossils indicates that specimens identified as non-calcified algae areSphenothallus taijiangensis n. sp., while specimens identified asScoleciellus belong toByronia natus (Liu).Sphenothallus taijiangensis andByronia natus from Lower Cambrian strata in the Kaili Formation are the oldest known representatives of their genera. In addition,B. natus (Liu) is the only known species ofByronia with the exception ofB. annulata Matthew (Middle Cambrian, British Columbia). CambrovitusMao et al., a tubular fossil from Middle Cambrian strata in the Kaili Formation, originally was classified as a hyolithid. However, the discovery of a nearly complete specimen possessing an apical attachment disk shows thatCambrovitus, likeByronia andSphenothallus, probably was a thecate cnidarian polyp. |
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