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DOI: 10.1016/j.palaeo.2015.11.042
论文题名:
The operculum and mode of life of the lower Cambrian hyolith Cupitheca from South Australia and North China
作者: Skovsted C.B.; Pan B.; Topper T.P.; Betts M.J.; Li G.; Brock G.A.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 443
起始页码: 123
结束页码: 130
语种: 英语
英文关键词: Hyolitha ; Lower Cambrian ; North China ; Operculum ; Orthothecida ; South Australia
英文摘要: The operculum of the problematic tubular fossil Cupitheca holocyclata Bengtson in Bengtson et al., (1990) is described for the first time based on collections from South Australia and North China. The phosphatized sub-circular operculum exhibits well defined cardinal processes and a narrow cardinal shield unequivocally demonstrating that Cupitheca is a hyolith, probably an orthothecid. C. holocyclata has an almost global distribution in Cambrian Stages 3-4. The apical structure of the operculum is an elevated, disc-shaped platform with a concave base and a marginal rim that could represent the scar of a specialized larval attachment structure, perhaps anchoring the larval hyolith to a sediment grain, algae or other benthic substrate. Cupitheca probably had a pelagic larval stage and settled on the seafloor by attachment of the apical disc to suitable substrates before developing a free-living benthic adult lifestyle. This contrasting mode of life compared to other hyolith genera suggests that the group had already evolved a range of distinct lifestyles in the Cambrian, providing significant clues into their ecology and distribution. © 2015 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68604
Appears in Collections:过去全球变化的重建

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作者单位: Department of Palaeobiology, Swedish Museum of Natural History, Box 50007, Stockholm, Sweden; State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, Nanjing, China; University of Chinese Academy of Sciences, Beijing, China; Department of Biological Sciences, Macquarie University, Sydney, NSW, Australia

Recommended Citation:
Skovsted C.B.,Pan B.,Topper T.P.,et al. The operculum and mode of life of the lower Cambrian hyolith Cupitheca from South Australia and North China[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,443
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