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Marcus Ward Lyon, Jr. (1875–1942) was an American
mammalogist ,
bacteriologist , and
pathologist . Born into a military family, he demonstrated an early interest in
zoology by collecting local wildlife around his father's army posts. He graduated from
Brown University in 1897, and continued his studies at
George Washington University while working part-time at the United States National Museum. He received his Ph.D. in 1913. Lyon published many papers on mammalogy,
formally describing six
species , three
genera , and one
family . In 1919, he and his wife Martha moved to
South Bend, Indiana , to join a newly opened clinic. He began to publish medical studies too, but continued his work in mammalogy, with a particular focus on the local fauna of Indiana. He published more than 160 papers during his career. Lyon acquired the rank of
major in the
Medical Reserve Corps during
World War I , and was appointed president of the
American Society of Mammalogists from 1931 to 1932. He was a member of
Sigma Xi , the
Society of American Bacteriologists , the
Indiana Academy of Science , and the
Biological Society of Washington . Lyon became a
conservationist later in life. (
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