Marcus Ward Lyon Jr. (February 5, 1875 – May 19, 1942) was an American
mammalogist,
bacteriologist
A bacteriologist is a microbiologist, or similarly trained professional, in bacteriology— a subdivision of microbiology that studies bacteria, typically Pathogenic bacteria, pathogenic ones. Bacteriologists are interested in studying and learnin ...
, and
pathologist
Pathology is the study of disease. The word ''pathology'' also refers to the study of disease in general, incorporating a wide range of biology research fields and medical practices. However, when used in the context of modern medical treatme ...
. He was born into a military family, and demonstrated an early interest in
zoology
Zoology ( , ) is the scientific study of animals. Its studies include the anatomy, structure, embryology, Biological classification, classification, Ethology, habits, and distribution of all animals, both living and extinction, extinct, and ...
by collecting local wildlife around his father's army posts. He graduated from
Brown University
Brown University is a Private university, private Ivy League research university in Providence, Rhode Island, United States. It is the List of colonial colleges, seventh-oldest institution of higher education in the US, founded in 1764 as the ' ...
in 1897, and continued his studies at
George Washington University
The George Washington University (GW or GWU) is a Private university, private University charter#Federal, federally-chartered research university in Washington, D.C., United States. Originally named Columbian College, it was chartered in 1821 by ...
while working part-time at the
United States National Museum
The Smithsonian Institution ( ), or simply the Smithsonian, is a group of museums, Education center, education and Research institute, research centers, created by the Federal government of the United States, U.S. government "for the increase a ...
(USNM). At the same time, he taught at
Howard University Medical School and later
George Washington University Medical School. He received his Ph.D. from
George Washington University
The George Washington University (GW or GWU) is a Private university, private University charter#Federal, federally-chartered research university in Washington, D.C., United States. Originally named Columbian College, it was chartered in 1821 by ...
in 1913.
In 1919, he and his wife, Martha, moved to
South Bend, Indiana
South Bend is a city in St. Joseph County, Indiana, United States, and its county seat. It lies along the St. Joseph River (Lake Michigan), St. Joseph River near its southernmost bend, from which it derives its name. It is the List of cities in ...
, to join a newly opened clinic. Prior to moving, Lyon had published many papers on mammalogy, both during and after his tenure at the USNM. In these papers, he had formally
described six
species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...
, three
genera
Genus (; : genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial s ...
, and one
family
Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
. Once in South Bend, 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
Major most commonly refers to:
* Major (rank), a military rank
* Academic major, an academic discipline to which an undergraduate student formally commits
* People named Major, including given names, surnames, nicknames
* Major and minor in musi ...
in the
Medical Reserve Corps
The Medical Reserve Corps (MRC) is a network in the U.S. of community-based units initiated and established by local organizations aimed at meeting the public health needs of their communities. It is sponsored by the Administration for Strategic ...
during World War I, and was appointed president of the
American Society of Mammalogists The American Society of Mammalogists (ASM) was founded in 1919. Its primary purpose is to encourage the study of mammal
A mammal () is a vertebrate animal of the Class (biology), class Mammalia (). Mammals are characterised by the presence ...
from 1931 to 1932. He was a member of
Sigma Xi
Sigma Xi, The Scientific Research Honor Society () is an international non-profit honor society for scientists and engineers. Sigma Xi was founded at Cornell University by a faculty member and graduate students in 1886 and is one of the oldest ...
, the
Society of American Bacteriologists, the
Indiana Academy of Science, and the
Biological Society of Washington. Lyon became a
conservationist later in life.
Early life and education
Lyon was born on February 5, 1875, in
Rock Island Arsenal, Illinois. His family included his father, Captain Marcus Ward Lyon Sr.; his mother, Lydia Anna Lyon; and his two brothers, Henry S. Lyon and James W. Lyon. Because of his father's military career, Lyon's family moved across the United States throughout his childhood and adolescence. The first hint of the young Lyon's future scientific interests came while they were stationed at
Watertown Arsenal
The Watertown Arsenal was a major American arsenal located on the northern shore of the Charles River in Watertown, Massachusetts. The site is now registered on the American Society of Civil Engineers, ASCE's List of Historic Civil Engineeri ...
, near
Boston, Massachusetts
Boston is the capital and most populous city in the Commonwealth (U.S. state), Commonwealth of Massachusetts in the United States. The city serves as the cultural and Financial centre, financial center of New England, a region of the Northeas ...
, where he began collecting insects and animals from the local area. No other details of his early life were documented until 1893, when he graduated from
Rock Island High School
Rock Island High School, also known as "Rocky", is a public four-year high school located in Rock Island, Illinois, United States. Rocky is within the Rock Island–Milan School District 41, and the school colors are crimson and gold.
Administr ...
—his father had evidently been re-stationed at Rock Island Arsenal at about this time. He attended
Brown University
Brown University is a Private university, private Ivy League research university in Providence, Rhode Island, United States. It is the List of colonial colleges, seventh-oldest institution of higher education in the US, founded in 1764 as the ' ...
and completed his
Ph.B. in 1897, which included training in
biology
Biology is the scientific study of life and living organisms. It is a broad natural science that encompasses a wide range of fields and unifying principles that explain the structure, function, growth, History of life, origin, evolution, and ...
. In 1898, he began his graduate studies at
George Washington University
The George Washington University (GW or GWU) is a Private university, private University charter#Federal, federally-chartered research university in Washington, D.C., United States. Originally named Columbian College, it was chartered in 1821 by ...
, obtaining his
M.S.
A Master of Science (; abbreviated MS, M.S., MSc, M.Sc., SM, S.M., ScM or Sc.M.) is a master's degree. In contrast to the Master of Arts degree, the Master of Science degree is typically granted for studies in sciences, engineering and medicine ...
in 1900, his
M.D. in 1902, and his
Ph.D. in 1913.
Career

Upon completion of his first degree, Lyon spent a year (1897–1898) at
North Carolina Medical College, where he taught
bacteriology
Bacteriology is the branch and specialty of biology that studies the Morphology (biology), morphology, ecology, genetics and biochemistry of bacteria as well as many other aspects related to them. This subdivision of microbiology involves the iden ...
. In conjunction with his graduate studies, he moved to Washington, D.C., in 1898 to become a part-time Aid in the Division of Mammals at the
United States National Museum
The Smithsonian Institution ( ), or simply the Smithsonian, is a group of museums, Education center, education and Research institute, research centers, created by the Federal government of the United States, U.S. government "for the increase a ...
(USNM). Lyon was later promoted to Assistant Curator for Mammals. The USNM sent him to
Venezuela
Venezuela, officially the Bolivarian Republic of Venezuela, is a country on the northern coast of South America, consisting of a continental landmass and many Federal Dependencies of Venezuela, islands and islets in the Caribbean Sea. It com ...
with Lieutenant Wirt Robinson of the
United States Army
The United States Army (USA) is the primary Land warfare, land service branch of the United States Department of Defense. It is designated as the Army of the United States in the United States Constitution.Article II, section 2, clause 1 of th ...
in 1899 to collect mammal specimens, and later appointed him as its Chief Special Agent for the 1904
Louisiana Purchase Exposition
The Louisiana Purchase Exposition, informally known as the St. Louis World's Fair, was an World's fair, international exposition held in St. Louis, St. Louis, Missouri, United States, from April 30 to December 1, 1904. Local, state, and federa ...
in
St. Louis
St. Louis ( , sometimes referred to as St. Louis City, Saint Louis or STL) is an independent city in the U.S. state of Missouri. It lies near the confluence of the Mississippi and the Missouri rivers. In 2020, the city proper had a populatio ...
and the 1905
Lewis and Clark Centennial Exposition in
Portland, Oregon
Portland ( ) is the List of cities in Oregon, most populous city in the U.S. state of Oregon, located in the Pacific Northwest region. Situated close to northwest Oregon at the confluence of the Willamette River, Willamette and Columbia River, ...
. He retained his post at the USNM until 1912. Lyon taught
physiology
Physiology (; ) is the science, scientific study of function (biology), functions and mechanism (biology), mechanisms in a life, living system. As a branches of science, subdiscipline of biology, physiology focuses on how organisms, organ syst ...
(1903–04 and 1907–09) and bacteriology (1909–15) at
Howard University Medical School.
In the latter half of 1915, Lyon began teaching at
George Washington University Medical School, handling courses in bacteriology and
pathology
Pathology is the study of disease. The word ''pathology'' also refers to the study of disease in general, incorporating a wide range of biology research fields and medical practices. However, when used in the context of modern medical treatme ...
until 1917, and veterinary
zoology
Zoology ( , ) is the scientific study of animals. Its studies include the anatomy, structure, embryology, Biological classification, classification, Ethology, habits, and distribution of all animals, both living and extinction, extinct, and ...
and
parasitology
Parasitology is the study of parasites, their host (biology), hosts, and the relationship between them. As a List of biology disciplines, biological discipline, the scope of parasitology is not determined by the organism or environment in questio ...
from 1917 until 1918. In 1917, he joined the U.S. Army, serving as a pathologist at the
Walter Reed Army Hospital during
World War I
World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
. In September 1919, he transferred to the
Medical Reserve Corps
The Medical Reserve Corps (MRC) is a network in the U.S. of community-based units initiated and established by local organizations aimed at meeting the public health needs of their communities. It is sponsored by the Administration for Strategic ...
as a
major
Major most commonly refers to:
* Major (rank), a military rank
* Academic major, an academic discipline to which an undergraduate student formally commits
* People named Major, including given names, surnames, nicknames
* Major and minor in musi ...
. By the end of that year, Lyon's 18 years of medical teaching and practice resulted in a job offer in pathology at the South Bend Clinic in
South Bend, Indiana
South Bend is a city in St. Joseph County, Indiana, United States, and its county seat. It lies along the St. Joseph River (Lake Michigan), St. Joseph River near its southernmost bend, from which it derives its name. It is the List of cities in ...
. His wife, Martha, was also extended a job offer at the same clinic, and joined as an
ophthalmologist
Ophthalmology (, ) is the branch of medicine that deals with the diagnosis, treatment, and surgery of eye diseases and disorders.
An ophthalmologist is a physician who undergoes subspecialty training in medical and surgical eye care. Following a ...
. Lyon maintained his offices at the clinic until his death in 1942.
Because of his work as a mammalogist, Lyon is considered the
taxonomic authority for the
family
Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
Ptilocercidae (
pen-tailed treeshrews), as well as the
genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
''Anathana'' (the
Madras treeshrew) and two genera of
leporids (
rabbit
Rabbits are small mammals in the family Leporidae (which also includes the hares), which is in the order Lagomorpha (which also includes pikas). They are familiar throughout the world as a small herbivore, a prey animal, a domesticated ...
s and
hare
Hares and jackrabbits are mammals belonging to the genus ''Lepus''. They are herbivores and live Solitary animal, solitarily or in pairs. They nest in slight depressions called forms, and their young are precociality, able to fend for themselves ...
s), ''Pentalagus'' (the
Amami rabbit) and ''Pronolagus'' (
red rock hare
The red rock hares are the four species of rabbit in the genus ''Pronolagus''. They are lagomorphs of the family Leporidae living in rocky habitats across Africa. Three species are restricted to Southern Africa, while one—Smith's red rock hare ...
s). Lyon was the first to
describe the
Bornean white-bearded gibbon (''Hylobates albibarbis''), the
Gansu pika (''Ochotona cansus''), the
Sumatran porcupine (''Hystrix sumatrae''), the
shadowy broad-nosed bat (''Platyrrhinus umbratus''), and two species of
slow loris
Slow lorises are a group of several species of Nocturnality, nocturnal Strepsirrhini, strepsirrhine primates that make up the genus ''Nycticebus''. Found in Southeast Asia and nearby areas, they range from Bangladesh and Northeast India in the ...
from
Borneo
Borneo () is the List of islands by area, third-largest island in the world, with an area of , and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime Southeast Asia, it is one of the Greater Sunda ...
, ''
Nycticebus bancanus
The Bangka slow loris (''Nycticebus bancanus'') is a Strepsirrhini, strepsirrhine primate and a species of slow loris that is native to southwestern Borneo and the island of Bangka Island, Bangka. Originally considered a subspecies or Synonym ...
'' and ''
Nycticebus borneanus
''Nycticebus borneanus'', the Bornean slow loris, is a Strepsirrhini, strepsirrhine primate and a species of slow loris that is native to central south Borneo in Indonesia. Formerly considered a subspecies or Synonym (taxonomy), synonym of ''Ny ...
''.
His
private zoological collections were incorporated into the collections at the USNM. Lyon created two
herbarium
A herbarium (plural: herbaria) is a collection of preserved plant biological specimen, specimens and associated data used for scientific study.
The specimens may be whole plants or plant parts; these will usually be in dried form mounted on a sh ...
s, the first containing plant specimens from
Oregon
Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...
and the second from the
Indiana Dunes and lower
Michigan
Michigan ( ) is a peninsular U.S. state, state in the Great Lakes region, Great Lakes region of the Upper Midwest, Upper Midwestern United States. It shares water and land boundaries with Minnesota to the northwest, Wisconsin to the west, ...
. The former was included in the United States National Herbarium, now the
United States Botanic Garden
The United States Botanic Garden (USBG) is a botanical garden on the grounds of the United States Capitol in Washington, D.C., near the James A. Garfield Monument.
The Botanic Garden is supervised by the United States Congress, Congress throug ...
, and the latter at the
University of Michigan Herbarium.
Publications
During his career, Lyon published more than 160 papers, roughly 80 of which were in the field of
zoology
Zoology ( , ) is the scientific study of animals. Its studies include the anatomy, structure, embryology, Biological classification, classification, Ethology, habits, and distribution of all animals, both living and extinction, extinct, and ...
and 55 more in pathology. Other publications included four articles in
botany
Botany, also called plant science, is the branch of natural science and biology studying plants, especially Plant anatomy, their anatomy, Plant taxonomy, taxonomy, and Plant ecology, ecology. A botanist or plant scientist is a scientist who s ...
, numerous book reviews, technical reports, and newspaper articles. Until the move to Indiana, Lyon wrote many papers in
mammalogy
In zoology, mammalogy is the study of mammals – a class of vertebrates with characteristics such as homeothermic metabolism, fur, four-chambered hearts, and complex nervous systems. The archive of number of mammals on earth is constantly growi ...
, focusing primarily on
morphology
Morphology, from the Greek and meaning "study of shape", may refer to:
Disciplines
*Morphology (archaeology), study of the shapes or forms of artifacts
*Morphology (astronomy), study of the shape of astronomical objects such as nebulae, galaxies, ...
,
systematics
Systematics is the study of the diversification of living forms, both past and present, and the relationships among living things through time. Relationships are visualized as evolutionary trees (synonyms: phylogenetic trees, phylogenies). Phy ...
, and
zoogeography
Zoogeography is the branch of the science of biogeography that is concerned with geographic distribution (present and past) of animal species.
As a multifaceted field of study, zoogeography incorporates methods of molecular biology, genetics, mo ...
. In addition to his Ph.D. thesis, entitled "
Treeshrews: An account of the mammalian family
Tupaiidae", he authored papers about other mammals of the
Far East
The Far East is the geographical region that encompasses the easternmost portion of the Asian continent, including North Asia, North, East Asia, East and Southeast Asia. South Asia is sometimes also included in the definition of the term. In mod ...
, with which he had become very familiar through his study of the collections that were sent to the USNM. Following the end of his relationship with the USNM in 1912, Lyon continued to write mammalogy material and began publishing basic medical studies.
After moving to Indiana, the focus of his publications shifted primarily to medical issues and mammalogy within his new home state. Despite his interest in and occupation with medical science, his passion was for the study of living and extinct mammals. He became a regular contributor to the ''
American Midland Naturalist
''The American Midland Naturalist'' was a quarterly peer-reviewed scientific journal covering natural history. It was established in 1909 by Julius Nieuwland and was published by the University of Notre Dame. According to the ''Journal Citation Re ...
'', publishing a list of plant species native to the Indiana Dunes and notes on
ground squirrel
Ground squirrels are rodents of the squirrel family (Sciuridae) that generally live on the ground or in burrows, rather than in trees like the tree squirrels. The term is most often used for the medium-sized ground squirrels, as the larger ones ar ...
s and
badger
Badgers are medium-sized short-legged omnivores in the superfamily Musteloidea. Badgers are a polyphyletic rather than a natural taxonomic grouping, being united by their squat bodies and adaptions for fossorial activity rather than by the ...
s prior to his work "Mammals of Indiana", which spanned all 365 pages of the first issue in 1936. In 1935, he had been invited to join the editorial staff, becoming an associate editor for mammalogy. Near the end of his life, Lyon began to write about
wildlife conservation
Wildlife conservation refers to the practice of protecting wild species and their habitats in order to maintain healthy wildlife species or populations and to restore, protect or enhance natural ecosystems. Major threats to wildlife include habita ...
.
A private collection of Lyon's papers, along with those of his wife, is held at the
University of Notre Dame
The University of Notre Dame du Lac (known simply as Notre Dame; ; ND) is a Private university, private Catholic research university in Notre Dame, Indiana, United States. Founded in 1842 by members of the Congregation of Holy Cross, a Cathol ...
Archives. It comprises correspondence, papers, notes, manuscripts, letters, articles, and speeches, as well as articles collected by Lyon and a scrapbook of his wife's college life and more.
Selected publications
*
*
*
*
*
*
*
*
Honors
Lyon held honorary memberships in
Phi Beta Kappa
The Phi Beta Kappa Society () is the oldest academic honor society in the United States. It was founded in 1776 at the College of William & Mary in Virginia. Phi Beta Kappa aims to promote and advocate excellence in the liberal arts and sciences, ...
and
Sigma Xi
Sigma Xi, The Scientific Research Honor Society () is an international non-profit honor society for scientists and engineers. Sigma Xi was founded at Cornell University by a faculty member and graduate students in 1886 and is one of the oldest ...
. A member of the organization committee that founded the District of Columbia Chapter of Sigma Xi in 1914, Lyon became the Secretary of both the Organization Committee and Chapter, which held its first annual meeting in 1915. He was appointed secretary of the
Biological Society of Washington in 1904 and from 1915 through 1919. In 1917, he was elected for membership to the Washington Biologists' Field Club. Lyon was president of the St. Joseph County Medical Society in 1931, as well as the treasurer (1927–1932) and president (1933) of the
Indiana Academy of Science. He was also a member of the
Society of American Bacteriologists. Lyon was the 7th president of the
American Society of Mammalogists The American Society of Mammalogists (ASM) was founded in 1919. Its primary purpose is to encourage the study of mammal
A mammal () is a vertebrate animal of the Class (biology), class Mammalia (). Mammals are characterised by the presence ...
from 1931 to 1932, and received honorary membership a month before he died.
Personal life
Lyon married Martha Marie Brewer ( 1871) of
Lanham, Maryland
Lanham is an unincorporated community and census-designated place in Prince George's County, Maryland. As of the 2020 United States census, it has a population of 11,282. The New Carrollton station (the terminus of the Washington Metro's O ...
, in 1902, and together they had one daughter, Charlotte Lyon. Lyon and his wife attended scientific meetings together; in 1911, they traveled to Europe to see museums and to visit famous zoologists. Martha Brewer Lyon obtained her M.S. at Columbian College in 1901 and M.D. from Brown University in 1907. She later worked as an ophthalmologist at the South Bend Clinic with her husband until she opened her own office in 1931. She maintained her office until her death on January 18, 1942. Lyon died on May 19, 1942, at his home in South Bend and was buried on May 27 at
Arlington National Cemetery
Arlington National Cemetery is the largest cemetery in the United States National Cemetery System, one of two maintained by the United States Army. More than 400,000 people are buried in its 639 acres (259 ha) in Arlington County, Virginia.
...
.
While living in South Bend, Lyon became close friends with Reverend
Julius A. Nieuwland,
CSC, a botanist and
chemist
A chemist (from Greek ''chēm(ía)'' alchemy; replacing ''chymist'' from Medieval Latin ''alchemist'') is a graduated scientist trained in the study of chemistry, or an officially enrolled student in the field. Chemists study the composition of ...
at the University of Notre Dame. They went on field trips and collected plant specimens that were incorporated into Lyon's second herbarium, which he made in his spare time with the help of his wife, Nieuwland, and Austrian botanist
Theodor Just. Lyon was known for his love of nature, and in an obituary written by Just, he was noted as being an "ardent
conservationist" later in his life. Lyon criticized poorly managed conservation programs in his paper "Conservation from the Naturalist's Point of View" (1939), and in his final paper, "The Kankakee Area—Its Past and Present", he envisioned life around the
Kankakee Outwash Plain before human activities had changed it. Lyon also gave up his cottage in the Indiana Dunes after the wildlife refuge was converted into a vacation destination.
Notes
References
Literature cited
*
*
*
*
*
*
*
*
*
*
*
*
*
External links
*
{{DEFAULTSORT:Lyon, Marcus Ward
1875 births
1942 deaths
American bacteriologists
American mammalogists
American pathologists
Brown University alumni
George Washington University School of Medicine & Health Sciences alumni
People from Rock Island County, Illinois
Physicians from Illinois
Presidents of the American Society of Mammalogists