Léon Vaillant
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Léon Louis Vaillant (; 11 November 1834 – 24 November 1914) was a French
zoologist Zoology ( , ) is the scientific study of animals. Its studies include the structure, embryology, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems. Zoology is one ...
. He is most famous for his work in the areas of
herpetology Herpetology (from Ancient Greek ἑρπετόν ''herpetón'', meaning "reptile" or "creeping animal") is a branch of zoology concerned with the study of amphibians (including frogs, salamanders, and caecilians (Gymnophiona)) and reptiles (in ...
,
malacology Malacology, from Ancient Greek μαλακός (''malakós''), meaning "soft", and λόγος (''lógos''), meaning "study", is the branch of invertebrate zoology that deals with the study of the Mollusca (molluscs or mollusks), the second-largest ...
, and
ichthyology Ichthyology is the branch of zoology devoted to the study of fish, including bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). According to FishBase, 35,800 species of fish had been described as of March 2 ...
. In 1854 he graduated from the College d'Arras, followed by studies in medicine and zoology in
Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...
. In 1861, he received his medical doctorate, then continued his zoological studies with
Henri Milne-Edwards Henri Milne-Edwards (23 October 1800 – 29 July 1885) was a French zoologist. Biography Henri Milne-Edwards was the 27th child of William Edwards, an English planter and colonel of the militia in Jamaica and Elisabeth Vaux, a Frenchwoman. Hen ...
(1800–1885), earning his degree in
natural sciences Natural science or empirical science is one of the branches of science concerned with the description, understanding and prediction of natural phenomena, based on empirical evidence from observation and experimentation. Mechanisms such as peer ...
in 1865. In 1875, he became a professor at the
Museum of Natural History A natural history museum or museum of natural history is a scientific institution with natural history collections that include current and historical records of animals, plants, fungi, ecosystems, geology, paleontology, climatology, and more ...
in Paris. He held a special interest involving the
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
anatomy Anatomy () is the branch of morphology concerned with the study of the internal structure of organisms and their parts. Anatomy is a branch of natural science that deals with the structural organization of living things. It is an old scien ...
of
turtle Turtles are reptiles of the order (biology), order Testudines, characterized by a special turtle shell, shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Crypt ...
s and
crocodile Crocodiles (family (biology), family Crocodylidae) or true crocodiles are large, semiaquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia. The term "crocodile" is sometimes used more loosely to include ...
s, but also made significant contributions in his investigations of reptilian
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 ...
and behavior. Of his 200-plus scientific writings, 90 of them are based on
herpetological Herpetology (from Ancient Greek ἑρπετόν ''herpetón'', meaning "reptile" or "creeping animal") is a branch of zoology concerned with the study of amphibians (including frogs, salamanders, and caecilians (Gymnophiona)) and reptiles (incl ...
subjects. He participated in French naval expeditions on the ''Travailleur'' in 1880, 1881 and 1882 and on the ''Talisman'' in 1883.


Eponyms

The following are several species of marine organisms named after Léon Vaillant: *The ribbon worm, ''Amphiporus vaillanti'' Joubin, 1902 *The squat lobster, '' Munidopsis vaillantii'' A. Milne-Edwards, 1881 *''Solamen vaillanti'' Issel, 1869 *''
Solariella vaillanti ''Calliotropis vaillanti'' is a species of sea snail, a marine gastropod mollusk in the family Eucyclidae. Description The height of the shell attains 8 mm. Distribution This species occurs in the Atlantic Ocean off Portugal, the Azores ...
'' Dautzenberg & H. Fischer, 1896 *''
Turbonilla vaillanti ''Turbonilla vaillanti'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.Gofas, S. (2012). ''Turbonilla vaillanti'' Dautzenberg & Fischer H., 1896. Accessed through: World Register ...
'' Dautzenberg & Fischer, 1896. The following are four species of reptiles named after Vaillant: *''
Chioninia vaillantii ''Chioninia vaillantii'', also known commonly as Vaillant's mabuya or Vaillant's skink, is a species of skink in the family Scincidae. The species is endemic to the Cape Verde Islands. There are two recognized subspecies. Conservation status '' ...
'' *''
Micrelaps vaillanti ''Micrelaps vaillanti'', also known Common name, commonly as the black-headed micrelaps or the Somali two-headed snake, is a species of mildly venomous Opisthoglyphous, rear-fanged snake in the Family (biology), family Micrelapidae. The species i ...
'' *'' Liophidium vaillanti'' . Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). ''The Eponym Dictionary of Reptiles''. Baltimore: Johns Hopkins University Press. xiii + 296 pp. . (Vaillant, p. 271; Ludovic, Latin for Louis, p. 162). *'' Dopasia ludovici'' The following fish are named after Vaillant: *The dragon fish, '' Bathophilus vaillanti'' Zugmayer, 1911 *The shortspine African angler, '' Lophius vaillanti'' Regan, 1903 *The pike cichlid '' Crenicichla vaillanti'' Pellegrin, 1904 *'' Paraliparis vaillanti'' Chernova, 2004 is a species of
snailfish The snailfishes or sea snails (not to be confused with invertebrate sea snails), are a family of marine ray-finned fishes. These fishes make up the Liparidae, a family classified within the order Scorpaeniformes. Widely distributed from the ...
found in the Northwestern
Atlantic Ocean The Atlantic Ocean is the second largest of the world's five borders of the oceans, oceanic divisions, with an area of about . It covers approximately 17% of Earth#Surface, Earth's surface and about 24% of its water surface area. During the ...
primarily in the Laurentia Channel, between
Newfoundland Newfoundland and Labrador is the easternmost province of Canada, in the country's Atlantic region. The province comprises the island of Newfoundland and the continental region of Labrador, having a total size of . As of 2025 the population ...
and
Cape Breton Cape Breton Island (, formerly '; or '; ) is a rugged and irregularly shaped island on the Atlantic coast of North America and part of the province of Nova Scotia, Canada. The island accounts for 18.7% of Nova Scotia's total area. Although ...
. *The Samurai gourami, ''
Sphaerichthys vaillanti ''Sphaerichthys'' is a genus of gouramis native to Southeast Asia known as chocolate gourami. These species live mostly in blackwater rivers/swamps with acidic water. They have dark-light brownish hues with the exception being the female of S. ...
'' Pellegrin, 1930 The following fish are possibly named after Vaillant: *'' Pseudogobio vaillanti'' ( Sauvage, 1878) *'' Hypostomus vaillanti'' is a
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), ...
of
catfish Catfish (or catfishes; order (biology), order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Catfish are common name, named for their prominent barbel (anatomy), barbels, which resemble a cat's whiskers, though not ...
in the family
Loricariidae Loricariidae is the largest family (biology), family of catfish (order Siluriformes), with over 90 genus, genera and just over 680 species. Loricariids originate from freshwater habitats of Costa Rica, Panama, and tropical and subtropical South A ...
. It is native to
South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...
, where it occurs in the Preto River basin in the
São Francisco River The São Francisco River (, ) is a large Rivers of Brazil, river in Brazil. With a length of , it is the longest river that runs entirely in Brazilian territory, and the fourth longest in South America and overall in Brazil (after the Amazon R ...
drainage.


Written works

* ''Études sur les poissons'', Mission scientifique au Mexique et dans l'Amérique centrale - Study of fishes. (with
Marie Firmin Bocourt Marie Firmin Bocourt (19 April 1819 – 4 February 1904) was a French zoologist and artist. As a young man, he worked as a preparateur for the zoologist Gabriel Bibron (1805–1848), later serving as a museum artist. In 1861, he was sent to Thail ...
1819-1904). * ''Essai sur le système pileux dans l'espèce humaine'', 1861, medical dissertation. * ''Observations sur la constitution géologique de quelques terrains aux environs de Suez'', 1865 - Observations on the
geological Geology (). is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth s ...
constitution of terrain and environs of
Suez Suez (, , , ) is a Port#Seaport, seaport city with a population of about 800,000 in north-eastern Egypt, located on the north coast of the Gulf of Suez on the Red Sea, near the southern terminus of the Suez Canal. It is the capital and largest c ...
. * ''Recherches sur la famille des Tridacnides'', 1865 - Research of the family
Tridacninae Tridacnidae, common name the giant clams, is a taxonomic subfamily of very large saltwater clams, marine bivalve molluscs in the family Cardiidae, the cockles. Description This subfamily contains the largest living bivalve species, including ...
. * ''Note sur quelques objets océaniens empruntés au test de différents mollusques'', 1868, Bulletin de la société géologique de France. - Note on a few items from the Pacific borrowed in order to test different mollusks. * ''Quelques mots sur Denys de Montfort à propos d'une brochure parue en 1815, sd Rapport sur les poissons, crustacés et mollusques'', 1880, Exposition universelle de 1878, à Paris - Some comments by
Pierre Denys de Montfort Pierre Denys de Montfort, also spelt Pierre Dénys de Montfort, (1766–1820) was a French Natural history, naturalist, in particular a malacologist, remembered today for his pioneering inquiries into the existence of the gigantic octopuses. He ...
(1815), Report on fishes,
crustaceans Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of Arthropod, arthropods that are traditionally a part of the subphylum Crustacea (), a large, diverse group of mainly aquat ...
and
mollusks Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The num ...
. * ''Mémoire sur la disposition des vertèbrés cervicales chez les chéloniens'' 1880 - Memoir on the disposition of
cervical vertebrae In tetrapods, cervical vertebrae (: vertebra) are the vertebrae of the neck, immediately below the skull. Truncal vertebrae (divided into thoracic and lumbar vertebrae in mammals) lie caudal (toward the tail) of cervical vertebrae. In saurop ...
of chelonians. * ''Expéditions scientifiques du travailleur et du Talisman pendant les annees 1880, 1881, 1882, 1883. Poissons'', 1888 - Scientific expeditions of the Travailleur and the Talisman during the years 1880 to 1883. * ''Histoire naturelle des annelés marins et d'eau douce'', 1889-1890, Collection des Suites à Buffon - Natural history of marine and freshwater
annelid The annelids (), also known as the segmented worms, are animals that comprise the phylum Annelida (; ). The phylum contains over 22,000 extant species, including ragworms, earthworms, and leeches. The species exist in and have adapted to vario ...
s; (with
Jean Louis Armand de Quatrefages de Bréau Jean Louis Armand de Quatrefages de Bréau (10 February 1810 – 12 January 1892) was a French biologist. Life He was born at Berthézène, in the commune of Valleraugue (Gard), the son of a Protestant farmer. He studied science and then med ...
1810-1892). * ''Les tortues éteintes de l'île Rodriguez d'après les pièces conservées dans les galeries du Muséum'', 1893 - Turles off of
Rodrigues Rodrigues ( ; Mauritian Creole, Creole: ) is a Autonomous administrative division, autonomous Outer islands of Mauritius, outer island of the Republic of Mauritius in the Indian Ocean, about east of Mauritius. It is part of the Mascarene Isl ...
, in reference to conserved pieces in the museum galleries.Le cths Sociétés savantes de France
(bibliography)
* ''Histoire naturelle des reptiles. Première partie: Crocodiles et tortues'', 1910 - Natural history of reptiles. first part: crocodiles and turtles.


Taxon described by him

*See :Taxa named by Léon Vaillant


References


External links


WorldCat Identities
(publications)
VIAF
{{DEFAULTSORT:Vaillant, Leon French herpetologists French ichthyologists 1834 births 1914 deaths French physiologists National Museum of Natural History (France) people Scientists from Paris