Describes the evolutionary development of horses. Evidence obtained from fossil records that supports the anagenetic view of horse phylogeny as well as cladogenetic pattern. Fossil record as a clasic example of macroevolution. Branching speciation. Support of the view that a gradual microevolutionary process occurred within the species. Focuses on the North American Eocene and Oligocene fossil records.
From the Paper:
"A Cladogenetic View of the Early Evolutionary History of Horses
Abstract
Drawing upon the theoretical and empirical literature, this report describes the evidence obtained from the fossil record that supports the anagenetic view of the horse phylogeny and its early evolutionary development. The anagenetic perspective advances the notion that a gradual microevolutionary process has occurred within a species. It is also associated with phyletic transformation from ancestral to descendant species. The fossil record for horses presents, in general, a progressive replacement of one genus with another without a strong indication of temporary overlapping. However, the literature also suggests that anagenetic development was dominant within the Eocene and Oligocene, while genetic diversity (branching) suggesting a ..."
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