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Full-Text Articles in Biodiversity
Wallace And Incipient Structures: A World Of "More Recondite" Influences, Charles H. Smith
Wallace And Incipient Structures: A World Of "More Recondite" Influences, Charles H. Smith
DLPS Faculty Publications
Alfred Russel Wallace is well-known for his co-discovery of the principle of natural selection. Natural selection is usually considered a process, but it is not clear that Wallace regarded it in exactly these terms. In fact he more likely thought of the relationships involved as representing what we would now term a “state space,” a negative feedback loop wherein populations are maintained at healthy levels through elimination of the unfit. Both before and after the advent of natural selection Wallace clung to the idea that “more recondite forces” were shaping the nature and direction of evolution; this is especially evident …
Recently Described Vulture One Of Several New Avian Species From The Ashfall Fossil Beds, Rick E. Otto
Recently Described Vulture One Of Several New Avian Species From The Ashfall Fossil Beds, Rick E. Otto
University of Nebraska State Museum: Programs Information
Several species of fossil bird are known from the Ashfall Fossil Beds. As of publication date, all represent previously undescribed species. In 2012, ornithologists Zhang, Feduccia and James described a vulture from isolated remains recovered from the Ashfall site in 1979. Similar in morphology to the Palm-nut Vulture (Gypohierax) of Africa, the relationship to the Ashfall vulture is unclear, and may represent an example of convergent evolution. The fossil vulture was designated Anchigyps voorhiesiin honor of paleontologist Michael Voorhies.