Problematic cap-shaped fossils from the Lower Cambrian of North-East Greenland |
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Authors: | John S Peel Christian B Skovsted |
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Institution: | 1. Program for Paleobiology, Department of Earth Sciences, Uppsala University, Norbyv?gen 22, SE-752 36, Uppsala, Sweden
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Abstract: | Three species ofOcruranus
Liu, 1979 are described from the Bastion Formation of North-East Greenland, of late Early Cambrian (middle Dyeran of North American
usage) age, representing the youngest record of a genus originally described from the earliest Cambrian Meishucunian Stage
of China. An accompanying species, tentatively assigned toXianfengella
He &Yang, 1982, seems also to be present in South Australia in strata of late Early Cambrian (Botoman of Siberian usage) age, although
also this genus was described originally from the Meishucunian.Ocruranus andXianfengella from China have been interpreted as possibly parts of coeloscleritophoran scleritomes, perhaps halkieriids, rather than individual
molluscan shells. Their shell form is not typical of helcionelloids which otherwise dominate the Early Cambrian molluscan
record, but conclusive evidence of affinity is not forthcoming from the Greenland records. New taxa:Ocruranus septentrionalis n. sp. andOcruranus tunuensis n. sp.
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Keywords: | North-East Greenland Early Cambrian Mollusca Helcionelloida Coeloscleritophora |
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