Browsing ELibrary by Subject "MACROEVOLUTION"

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  • 1.3 BILLION YEARS OF ACRITARCH HISTORY: AN EMPIRICAL MORPHOSPACE APPROACH 
    Huntley J.W.; Xiao S.; Kowalewski M. (2006)
    Acritarchs are a group of organic-walled vesicular microfossils interpreted as protists, and are among the first eukaryotes preserved in the fossil record. Taxonomic inconsistencies amongst acritarch workers have made it ...
  • EVOLUTIONARY MORPHOLOGY OF OBLIQUE RIBS OF BIVALVES 
    Checa A.G.; Jimenez-Jimenez A.P. (2003)
    Fossil bivalves bearing oblique ribs first appeared in the Mid Ordovician but their diversity remained low during the Palaeozoic. The diversity soon increased after the Early Triassic, peaking in the Early Cretaceous. The ...