Sources of C 30 steroid biomarkers in Neoproterozoic–Cambrian rocks and oils
NATURE ECOLOGY & EVOLUTION(2019)
摘要
Nettersheim et al.propose that unicellular Rhizaria are the likely biological source of the C₃₀ steroidal hydrocarbons found abundantly in Neoproterozoic–Cambrian sedimentary rocks. Their hypothesis challenges earlier research arguing that 24-isopropylcholestane (24-ipc) and 26-methylstigmastane (26-mes) are produced by demosponges and, therefore, early animal biomarkers2. Fundamental problems beset the new steroid biomarker data and its interpretation.
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关键词
Biogeochemistry,Evolution,Life Sciences,general,Ecology,Evolutionary Biology,Zoology,Paleontology,Biological and Physical Anthropology
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