Two of the greatest evolutionary events in the history of life on Earth occurred during Early Paleozoic time. The first was the Cambrian explosion of skeletonized marine animals about 540 million years ago. The second was the qqGreat Ordovician Biodiversification Event, qq which is the focus of this book. During the 46-million-year Ordovician Period (489--443 m.y.), a bewildering array of adaptive radiations of qqPaleozoic- and Modern-typeqq biotas appeared in marine habitats, the first animals (arthropods) walked on land, and the first non-vascular bryophyte-like plants (based on their.As shown in detail later in this chapter, there are many unsolved problems in the higher taxonomy of Ordovician gastropods. ... Fortunately, recent neontological studies have shown that some features dants (see Ponder and Lindberg 1997).
|Title||:||The Great Ordovician Biodiversification Event|
|Author||:||Barry D. Webby, Florentin Paris, Mary L. Droser, Ian G. Percival|
|Publisher||:||Columbia University Press - 2012-05-29|