{"refrec":{"BRefID":216180,"RR":"<b>Javaux, E.J.; Knoll, A.H.; Walter, M.R.</b> (2004). TEM evidence for eukaryotic diversity in mid-Proterozoic oceans. <i>Geobiol. 2(3)</i>: 121-132. <a href=\"http://dx.doi.org/10.1111/j.1472-4677.2004.00027.x\" target=\"_blank\">dx.doi.org/10.1111/j.1472-4677.2004.00027.x</a>","BEntID":207933,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Geobiol. 2(3)</i>: 121-132. <a href=\"https://dx.doi.org/10.1111/j.1472-4677.2004.00027.x\" target=\"_blank\">https://dx.doi.org/10.1111/j.1472-4677.2004.00027.x</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Javaux, E.J.; Knoll, A.H.; Walter, M.R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Javaux, E.J. <i>et al.</i>","Englishabstract":"Biomarker molecular fossils in 2770 Ma shales suggest that the Eucarya diverged from other principal domains early in Earth history. Nonetheless, at present, the oldest fossils that can be assigned to an extant eukaryotic clade are filamentous red algae preserved in ca. 1200 Ma cherts from Arctic Canada. Between these records lies a rich assortment of potentially protistan microfossils. Combined light microscopy, scanning electron microscopy, and transmission electron microscopy on 1500-1400 Ma fossils from the Roper Group, Australia, and broadly coeval rocks from China show that these intermediate assemblages do indeed include a moderate diversity of eukaryotic remains. 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