Joseph Leidy (1823-1891)

The first full-time American vertebrate paleontologist; described many important Tertiary mammals. After a distinguished career starting in the 1850's, he quit the field in disgust over the Cope-Marsh feud, which resulted in his losing collectors, field areas, and specimens to the warring parties. Although not a theorist, he did convert immediately to Darwinism. More details are on the ANSP web site.


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