Rucervus
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''Rucervus'' is a
genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
of
deer Deer or true deer are hoofed ruminant mammals forming the family Cervidae. The two main groups of deer are the Cervinae, including the muntjac, the elk (wapiti), the red deer, and the fallow deer; and the Capreolinae, including the reindeer ...
from
India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
,
Nepal Nepal (; ne, नेपाल ), formerly the Federal Democratic Republic of Nepal ( ne, सङ्घीय लोकतान्त्रिक गणतन्त्र नेपाल ), is a landlocked country in South Asia. It is mai ...
,
Indochina Mainland Southeast Asia, also known as the Indochinese Peninsula or Indochina, is the continental portion of Southeast Asia. It lies east of the Indian subcontinent and south of Mainland China and is bordered by the Indian Ocean to the west an ...
, and the Chinese island of
Hainan Hainan (, ; ) is the smallest and southernmost province of the People's Republic of China (PRC), consisting of various islands in the South China Sea. , the largest and most populous island in China,The island of Taiwan, which is slightly l ...
. The only extant representatives, the
barasingha The barasingha (''Rucervus duvaucelii''), also known as the swamp deer, is a deer species distributed in the Indian subcontinent. Populations in northern and central India are fragmented, and two isolated populations occur in southwestern Nepal. ...
(''R. duvaucelii)'' and
Eld's deer Eld's deer (''Rucervus eldii'' or ''Panolia eldii''Pitraa, Fickela, Meijaard, Groves (2004). ''Evolution and phylogeny of old world deer.'' Molecular Phylogenetics and Evolution 33: 880–895.), also known as the thamin or brow-antlered deer, is ...
(''R. eldii''), are
threatened Threatened species are any species (including animals, plants and fungi) which are vulnerable to endangerment in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of ''critical depensat ...
by
habitat loss Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby ...
and hunting, and another species ('' R. schomburgki)'' became
extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...
in 1938. The species of the genus ''Rucervus'' are characterized by a specific
antler Antlers are extensions of an animal's skull found in members of the Cervidae (deer) family. Antlers are a single structure composed of bone, cartilage, fibrous tissue, skin, nerves, and blood vessels. They are generally found only on male ...
structure: its basal ramification is often supplemented with an additional small prong, the middle tine is never present, while the crown tines are inserted on the posterior side of the beam and may be bifurcated or fused into a small palmation.


Species


Extant species

*''Rucervus duvaucelii'' (
Cuvier Jean Léopold Nicolas Frédéric, Baron Cuvier (; 23 August 1769 – 13 May 1832), known as Georges Cuvier, was a French naturalist and zoologist, sometimes referred to as the "founding father of paleontology". Cuvier was a major figure in nat ...
, 1823) -
barasingha The barasingha (''Rucervus duvaucelii''), also known as the swamp deer, is a deer species distributed in the Indian subcontinent. Populations in northern and central India are fragmented, and two isolated populations occur in southwestern Nepal. ...
or swamp deer *''Rucervus eldii'' (
McClelland McClelland is a surname. Notable people with the surname include: * Alyssa McClelland, Australian actress * Charles A. McClelland (1917–2006), American political systems analyst * Charles P. McClelland (1854–1944), New York politician, and US ...
, 1842) -
Eld's deer Eld's deer (''Rucervus eldii'' or ''Panolia eldii''Pitraa, Fickela, Meijaard, Groves (2004). ''Evolution and phylogeny of old world deer.'' Molecular Phylogenetics and Evolution 33: 880–895.), also known as the thamin or brow-antlered deer, is ...
or thamin


Extinct species

*''Rucervus ardei'' (Croizet & Jobert, 1828) (
Pliocene The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...
) *''Rucervus colberti'' (Azzaroli, 1954) (
Tertiary Tertiary ( ) is a widely used but obsolete term for the geologic period from 66 million to 2.6 million years ago. The period began with the demise of the non-avian dinosaurs in the Cretaceous–Paleogene extinction event, at the start ...
,
Sivalik Hills The Sivalik Hills, also known as the Shivalik Hills and Churia Hills, are a mountain range of the outer Himalayas that stretches over about from the Indus River eastwards close to the Brahmaputra River, spanning the northern parts of the Indi ...
) *''Rucervus gigans'' Croitor, 2018 (
Early Pleistocene The Early Pleistocene is an unofficial sub-epoch in the international geologic timescale in chronostratigraphy, being the earliest division of the Pleistocene Epoch within the ongoing Quaternary Period. It is currently estimated to span the time ...
,
Greece Greece,, or , romanized: ', officially the Hellenic Republic, is a country in Southeast Europe. It is situated on the southern tip of the Balkans, and is located at the crossroads of Europe, Asia, and Africa. Greece shares land borders with ...
) *''Rucervus giulii'' (Kahlke, 1997) (
Early Pleistocene The Early Pleistocene is an unofficial sub-epoch in the international geologic timescale in chronostratigraphy, being the earliest division of the Pleistocene Epoch within the ongoing Quaternary Period. It is currently estimated to span the time ...
,
Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
) *''Rucervus radulescu''i Croitor, 2018 (
Early Pleistocene The Early Pleistocene is an unofficial sub-epoch in the international geologic timescale in chronostratigraphy, being the earliest division of the Pleistocene Epoch within the ongoing Quaternary Period. It is currently estimated to span the time ...
,
Romania Romania ( ; ro, România ) is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern, and Southeast Europe, Southeastern Europe. It borders Bulgaria to the south, Ukraine to the north, Hungary to the west, S ...
) *''Rucervus schomburgki'' -
Schomburgk's deer The Schomburgk's deer (''Rucervus schomburgki'') is an extinct species of deer once endemic to central Thailand. It was described by Edward Blyth in 1863 and named after Sir Robert H. Schomburgk, who was the British consul in Bangkok from 1857 t ...
(
Thailand Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is bo ...
; extinct, 1938) *''Rucervus simplicidens'' (
Lydekker Richard Lydekker (; 25 July 1849 – 16 April 1915) was an English naturalist, geologist and writer of numerous books on natural history. Biography Richard Lydekker was born at Tavistock Square in London. His father was Gerard Wolfe Lydekker, ...
, 1876) (
Tertiary Tertiary ( ) is a widely used but obsolete term for the geologic period from 66 million to 2.6 million years ago. The period began with the demise of the non-avian dinosaurs in the Cretaceous–Paleogene extinction event, at the start ...
,
Sivalik Hills The Sivalik Hills, also known as the Shivalik Hills and Churia Hills, are a mountain range of the outer Himalayas that stretches over about from the Indus River eastwards close to the Brahmaputra River, spanning the northern parts of the Indi ...
) *''Rucervus verestchagini'' (David, 1992) (
Early Pleistocene The Early Pleistocene is an unofficial sub-epoch in the international geologic timescale in chronostratigraphy, being the earliest division of the Pleistocene Epoch within the ongoing Quaternary Period. It is currently estimated to span the time ...
,
Moldova Moldova ( , ; ), officially the Republic of Moldova ( ro, Republica Moldova), is a Landlocked country, landlocked country in Eastern Europe. It is bordered by Romania to the west and Ukraine to the north, east, and south. The List of states ...
) According to the old tradition of zoological taxonomy, swamp deer originally were regarded as members of the genus ''
Cervus ''Cervus'' is a genus of deer that primarily are native to Eurasia, although one species occurs in northern Africa and another in North America. In addition to the species presently placed in this genus, it has included a whole range of other sp ...
. Rucervus'' was originally proposed by Hodgson Hodgson, B.H. 1838. Proceedings of Learned Societies. Linnaean Society, Feb. 20, 1838. Ann. Nat. Hist., 1, 152-154. as a subgenus of the genus ''Cervus.'' The original definition of ''Rucervus'' was mostly based on antler shape believed to be intermediate between that of elaphus''' and '''hippelaphus'''. Hodgson reported that upper canines are present only in males of
barasingha The barasingha (''Rucervus duvaucelii''), also known as the swamp deer, is a deer species distributed in the Indian subcontinent. Populations in northern and central India are fragmented, and two isolated populations occur in southwestern Nepal. ...
, but the additional craniological material shows that upper canines are present in both sexes.
Eld's deer Eld's deer (''Rucervus eldii'' or ''Panolia eldii''Pitraa, Fickela, Meijaard, Groves (2004). ''Evolution and phylogeny of old world deer.'' Molecular Phylogenetics and Evolution 33: 880–895.), also known as the thamin or brow-antlered deer, is ...
was regarded as another species of the genus ''Rucervus'', however, the recent genetic evidences suggest that Eld's deer is most closely related to
Père David's deer The Père David's deer (''Elaphurus davidianus''), also known as the ''milu'' () or elaphure, is a species of deer native to the subtropical river valleys of China. It grazes mainly on grass and aquatic plants. It is the only extant member of ...
Pitraa, Fickela, Meijaard, Groves (2004). ''Evolution and phylogeny of old world deer.'' Molecular Phylogenetics and Evolution 33: 880–895. and should be placed in its own genus, ''Panolia''.Groves (2006). ''The genus Cervus in eastern Eurasia.'' European Journal of Wildlife Research 52: 14–22 However, it has recently been place back into ''Rucervus'' by the
American Society of Mammalogists The American Society of Mammalogists (ASM) was founded in 1919. Its primary purpose is to encourage the study of mammals, and professions studying them. There are over 4,500 members of this society, and they are primarily professional scientists ...
despite Eld's deer is not closely related to barasingha in genetics and antler structure. ''Rucervus'' is an ancient cervid lineage that--together with the genus ''
Axis An axis (plural ''axes'') is an imaginary line around which an object rotates or is symmetrical. Axis may also refer to: Mathematics * Axis of rotation: see rotation around a fixed axis *Axis (mathematics), a designator for a Cartesian-coordinate ...
''--represents the oldest
evolutionary radiation An evolutionary radiation is an increase in taxonomic diversity that is caused by elevated rates of speciation, that may or may not be associated with an increase in morphological disparity. Radiations may affect one clade or many, and be rapid ...
of the subfamily
Cervinae The Cervinae or the Old World deer, are a subfamily of deer. Alternatively, they are known as the plesiometacarpal deer, due to their ankle structure being different from the telemetacarpal deer of the Capreolinae. Classification and species The ...
( plesiometacarpal deer).


Paleontological record

The fossil species of ''Rucervus'' of Europe were included in the genus '' Arvernoceros'' Heintz, 1971 (the type species: ''Cervus ardei'' Croizet & Jobert, 1828) or in the genus ''
Eucladoceros ''Eucladoceros'' (Greek for "well-branched antler") or bush-antlered deer is an extinct genus of deer whose fossils have been discovered in Europe, the Middle East and Central Asia. This genus was formally described by Hugh Falconer in 1868.Fal ...
'', as in the case of ''R. giulii''. Today, ''Arvernoceros'' is regarded as a
subgenus In biology, a subgenus (plural: subgenera) is a taxonomic rank directly below genus. In the International Code of Zoological Nomenclature, a subgeneric name can be used independently or included in a species name, in parentheses, placed between t ...
of ''Rucervus''. The European fossil forms of ''Rucervus'' are distinguished from the South Asian species by more compact crown part of the antler and by the frequent development of a small distal palmation as for instance in ''R. ardei'' and ''R. radulescui''. South Asian fossil forms of ''Rucervus'' are represented by large-sized ''R. simplicidens'' and ''R. colberti''. The late Early Pleistocene of Greece has yielded the remains of a giant species ''R. gigans'' that rivaled in size
Irish elk The Irish elk (''Megaloceros giganteus''), also called the giant deer or Irish deer, is an extinct species of deer in the genus ''Megaloceros'' and is one of the largest deer that ever lived. Its range extended across Eurasia during the Pleisto ...
''
Megaloceros giganteus The Irish elk (''Megaloceros giganteus''), also called the giant deer or Irish deer, is an extinct species of deer in the genus '' Megaloceros'' and is one of the largest deer that ever lived. Its range extended across Eurasia Eurasia ( ...
'', The giant ''Rucervus'' from Greece is distinguished by unusually for such a large animal long limbs and apparently is closely related to ''R. simplicidens'' and ''R. colberti'' from the Sivaliks. The Southwest-Europe endemic Mid to early Late Pleistocene genus '' Haploidoceros'' is regarded as closely allied.


References

{{Taxonbar, from=Q844555 Cervines Mammal genera Taxa named by Brian Houghton Hodgson