This timeline of ceratosaur research is a chronological listing of events in the

history History (derived ) is the systematic study and the documentation of the human activity. The time period of event before the invention of writing systems is considered prehistory. "History" is an umbrella term comprising past events as well ...

paleontology Paleontology (), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossi ...

focused on the ceratosaurs, a group of relatively primitive, often horned, predatory

theropod Theropoda (; ), whose members are known as theropods, is a dinosaur clade that is characterized by hollow bones and three toes and claws on each limb. Theropods are generally classed as a group of saurischian dinosaurs. They were ancestrally c ...

dinosaurs Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is the ...

that became the apex predators of the southern hemisphere during the

Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', ...

. The

nature Nature, in the broadest sense, is the physical world or universe. "Nature" can refer to the phenomena of the physical world, and also to life in general. The study of nature is a large, if not the only, part of science. Although humans are ...

and taxonomic composition of the Ceratosauria has been controversial since the group was first distinguished in the late

19th century The 19th (nineteenth) century began on 1 January 1801 ( MDCCCI), and ended on 31 December 1900 ( MCM). The 19th century was the ninth century of the 2nd millennium. The 19th century was characterized by vast social upheaval. Slavery was abolish ...

. In 1884

Othniel Charles Marsh Othniel Charles Marsh (October 29, 1831 – March 18, 1899) was an American professor of Paleontology in Yale College and President of the National Academy of Sciences. He was one of the preeminent scientists in the field of paleontology. Among ...

described the new genus and species ''

Ceratosaurus nasicornis ''Ceratosaurus'' (from Greek κέρας/κέρατος, ' meaning "horn" and σαῦρος ' meaning "lizard") was a carnivorous theropod dinosaur in the Late Jurassic period (Kimmeridgian to Tithonian). The genus was first described in 1884 ...

'' from the

Late Jurassic The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 163.5 ± 1.0 to 145.0 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic strata.Owen 1987. In European lithostratigraphy, the name ...

Morrison Formation The Morrison Formation is a distinctive sequence of Upper Jurassic sedimentary rock found in the western United States which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandstone, siltston ...

of the western United States. He felt that it belonged in a new family that he called the

Ceratosauridae Ceratosauridae is an extinct family of theropod dinosaurs belonging to the infraorder Ceratosauria. The family's type genus, ''Ceratosaurus'', was first found in Jurassic rocks from North America. Ceratosauridae is made up of the genera ''Cera ...

. He created the new taxon Ceratosauria to include both the Ceratosauridae and the

ostrich Ostriches are large flightless birds of the genus ''Struthio'' in the order Struthioniformes, part of the infra-class Palaeognathae, a diverse group of flightless birds also known as ratites that includes the emus, rheas, and kiwis. There ...

-like ornithomimids. The idea of the Ceratosauria was soon contested, however. Later that same decade both

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, ...

and Marsh's hated rival

Edward Drinker Cope Edward Drinker Cope (July 28, 1840 – April 12, 1897) was an American zoologist, paleontologist, comparative anatomist, herpetologist, and ichthyologist. Born to a wealthy Quaker family, Cope distinguished himself as a child prodigy interes ...

argued that the taxon was invalid. The idea of the Ceratosauria would regain some support more than thirty years later when Gilmore argued in its favor in

1920 Events January * January 1 ** Polish–Soviet War in 1920: The Russian Red Army increases its troops along the Polish border from 4 divisions to 20. ** Kauniainen, completely surrounded by the city of Espoo, secedes from Espoo as its own ma ...

. Nevertheless, the validity of Ceratosauria was disputed throughout much of the

20th century The 20th (twentieth) century began on January 1, 1901 ( MCMI), and ended on December 31, 2000 ( MM). The 20th century was dominated by significant events that defined the modern era: Spanish flu pandemic, World War I and World War II, nuclear ...

by researchers like

Romer A Reference Card or "Romer" is a device for increasing the accuracy when reading a grid reference from a map. Made from transparent plastic, paper or other materials, they are also found on most baseplate compasses. Essentially, it is a speciall ...

, Lapparent, Lavocat, Colbert, and Charig. However, in

1986 The year 1986 was designated as the International Year of Peace by the United Nations. Events January * January 1 ** Aruba gains increased autonomy from the Netherlands by separating from the Netherlands Antilles. **Spain and Portugal ente ...

, more than a century after Marsh first coined the name,

Jacques Gauthier Jacques Armand Gauthier (born June 7, 1948 in New York City) is an American vertebrate paleontologist, comparative morphologist, and systematist, and one of the founders of the use of cladistics in biology. Life and career Gauthier is the so ...

revived the idea. Three years later, Rowe published a new definition of Ceratosauria, all taxa more closely related to ''Ceratosaurus'' than to

birds Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweigh ...

, based on Gauthier's use of the term. This modern use of the term was thought to include the many theropods discovered since the

1880s The 1880s (pronounced "eighteen-eighties") was a decade of the Gregorian calendar that began on January 1, 1880, and ended on December 31, 1889. The period was characterized in general by economic growth and prosperity in many parts of the world, ...

known as

coelophysoids Coelophysoidea were common dinosaurs of the Late Triassic and Early Jurassic periods. They were widespread geographically, probably living on all continents. Coelophysoids were all slender, carnivorous forms with a superficial similarity to the ...

. ''Ceratosaurus'' itself had loose

joints A joint or articulation (or articular surface) is the connection made between bones, ossicles, or other hard structures in the body which link an animal's skeletal system into a functional whole.Saladin, Ken. Anatomy & Physiology. 7th ed. McGraw- ...

between bones in the

skull The skull is a bone protective cavity for the brain. The skull is composed of four types of bone i.e., cranial bones, facial bones, ear ossicles and hyoid bone. However two parts are more prominent: the cranium and the mandible. In humans, the ...

whose interpretation has been controversial. Paleontologist Robert T. Bakker has interpreted this condition as an adaptation to swallow prey larger than it would otherwise be able to fit through its jaws. Since the

1980s File:1980s replacement montage02.PNG, 420px, From left, clockwise: The first Space Shuttle, ''Columbia'', lifts off in 1981; US president Ronald Reagan and Soviet leader Mikhail Gorbachev ease tensions between the two superpowers, leading to the ...

, major developments in ceratosaur taxonomy have centered on the discovery of the

Abelisauridae Abelisauridae (meaning "Abel's lizards") is a family (or clade) of ceratosaurian theropod dinosaurs. Abelisaurids thrived during the Cretaceous period, on the ancient southern supercontinent of Gondwana, and today their fossil remains are found ...

, a new family of large ceratosaurs that were among the dominant predators of the southern hemisphere during the Cretaceous. One of the most notable of these was ''

Carnotaurus ''Carnotaurus'' (; ) is a genus of theropod dinosaur that lived in South America during the Late Cretaceous period, probably sometime between 71 and 69 million years ago. The only species is ''Carnotaurus sastrei''. Known from a single well-p ...

'', an unusual horned theropod with a short face. More recent noteworthy non-abelisaur ceratosaur discoveries include the protruding-toothed

noasaurid Noasauridae is an extinct family of theropod dinosaurs belonging to the group Ceratosauria. They were closely related to the short-armed abelisaurids, although most noasaurids had much more traditional body types generally similar to other ther ...

Masiakasaurus knopfleri ''Masiakasaurus'' is a genus of small predatory noasaurid theropod dinosaurs from the Late Cretaceous of Madagascar. In Malagasy, ''masiaka'' means "vicious"; thus, the genus name means "vicious lizard". The type species, ''Masiakasaurus knopf ...

'', named after the lead guitarist from

Dire Straits Dire Straits were a British rock band formed in London in 1977 by Mark Knopfler (lead vocals and lead guitar), David Knopfler (rhythm guitar and backing vocals), John Illsley (bass guitar and backing vocals) and Pick Withers (drums and percuss ...

19th century

1880s

1884 *

described the new

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 ...

and

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

''. He also erected the new family

and named the Ceratosauria to include both ''Ceratosaurus'' and the

Ornithomimidae Ornithomimidae (meaning "bird-mimics") is a family of theropod dinosaurs which bore a superficial resemblance to modern ostriches. Ornithomimids were fast, omnivorous or herbivorous dinosaurs known mainly from the Late Cretaceous Period of Lauras ...

. 1888 *

Richard 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, ...

rejected the validity of the Ceratosauria and Ceratosauridae.

1890s

1892 * Cope rejected the validity of the Ceratosauria and Ceratosauridae. 1896 *

Charles Depéret Charles Jean Julien Depéret (25 June 1854 – 18 May 1929) was a French geologist and paleontologist. He was a member of the French Academy of Sciences, the Société géologique de France

described the new species ''

Megalosaurus crenatissimus ''Majungasaurus'' (; ) is a genus of abelisaurid theropod dinosaur that lived in Madagascar from 70 to 66 million years ago, at the end of the Cretaceous Period (geology), Period, making it one of the last known non-avian dinosaurs that went ex ...

'', based mostly on vertebrae. * Marsh described the new genus and species '' Labrosaurus sulcatus''.

20th century

1900s

1901

Arthur Smith Woodward Sir Arthur Smith Woodward, FRS (23 May 1864 – 2 September 1944) was an English palaeontologist, known as a world expert in fossil fish. He also described the Piltdown Man fossils, which were later determined to be fraudulent. He is not relate ...

described the new genus and species '' Genyodectes serus''.

1910s

1919 *

Othenio Abel Othenio Lothar Franz Anton Louis Abel (June 20, 1875 – July 4, 1946) was an Austrian paleontologist and evolutionary biologist. Together with Louis Dollo, he was the founder of "paleobiology" and studied the life and environment of fossilized or ...

rejected the validity of the Ceratosauria and Ceratosauridae.

1920s

1920 *

Werner Janensch Werner Ernst Martin Janensch (11 November 1878 – 20 October 1969) was a German paleontologist and geologist. Biography Janensch was born at Herzberg (Elster). In addition to Friedrich von Huene, Janensch was probably Germany's most imp ...

described the new genus and species '' Elaphrosaurus bambergi''. *

Charles Whitney Gilmore Charles Whitney Gilmore (March 11, 1874 – September 27, 1945) was an American paleontologist who gained renown in the early 20th century for his work on vertebrate fossils during his career at the United States National Museum (now the N ...

recognized the Ceratosauria and/or Ceratosauridae as valid. 1921 Sarcosaurus woodi

Charles William Andrews Charles William Andrews (30 October 1866 – 25 May 1924) F.R.S., was a British palaeontologist whose career as a vertebrate paleontologist, both as a curator and in the field, was spent in the services of the British Museum, Department of Ge ...

described the new genus and species '' Sarcosaurus woodi''. *

Charles Alfred Matley Charles Alfred Matley (1866–1947) was a British paleontologist and geologist in India, the British West Indies and Wales. Matley was educated at Birmingham University, and earned a doctorate in geology (D.Sc.) from the University of London in J ...

described the new genus and species '' Lametasaurus indicus''. 1925 * Janensch described the new species '' Ceratosaurus roechlingi''. He also described the new species '' Labrosaurus stechowi''.

1930s

1931 * Hem Chandra Das Gupta described the new genus and species '' Orthogoniosaurus matleyi''. 1932 * Von Huene described the new genus and species '' Laevisuchus indicus''. He also described the new genus and species '' Coeluroides largus''. He also described the new species '' Dryptosauruoides grandis''. He also described the new genus and species '' Velocipes guerichi''. He also described the new species '' Sarcosaurus andrewsi''. Huene recognized the Ceratosauria and/or Ceratosauridae as valid. 1933 * Von Huene and Matley described the new genus and species '' Indosaurus matleyi''. They also described the new genus and species '' Indosuchus raptorius''. They also described the new genus and species '' Jubbulpuria tenuis''. They also described the new genus and species '' Ornithomimoides barasimlensis''. They also described the new species '' O. mobilis''. *

Alfred Sherwood Romer Alfred Sherwood Romer (December 28, 1894 – November 5, 1973) was an American paleontologist and biologist and a specialist in vertebrate evolution. Biography Alfred Romer was born in White Plains, New York, the son of Harry Houston Romer an ...

rejected the validity of the Ceratosauria and Ceratosauridae.

1950s

1955

René Lavocat René Lavocat (August 24, 1909-August 9, 2007) was a French paleontologist who described several genera of African dinosaurs including the sauropod ''Rebbachisaurus'', as well as several extinct mammals such as the family Kenyamyidae. The mammal ...

erected the new genus ''

Majungasaurus ''Majungasaurus'' (; ) is a genus of abelisaurid theropod dinosaur that lived in Madagascar from 70 to 66 million years ago, at the end of the Cretaceous Period (geology), Period, making it one of the last known non-avian dinosaurs that went ex ...

'' to house the species "''Megalosaurus''" ''crenatissimus'', and designated a neotype specimen. *

Albert-Félix de Lapparent Albert-Félix de Lapparent (1905–1975) was a French palaeontologist. He was also a Sulpician priest. He undertook a number of fossil-hunting explorations in the Sahara desert. He contributed greatly to our knowledge of dinosaurs and other prehist ...

and Lavocat rejected the validity of the Ceratosauria and Ceratosauridae. 1956 * Romer rejected the validity of the Ceratosauria and Ceratosauridae. * Von Huene recognized the Ceratosauria and/or Ceratosauridae as valid.

1960s

1964 * Colbert rejected the validity of the Ceratosauria and Ceratosauridae. 1966 * Romer rejected the validity of the Ceratosauria and Ceratosauridae.

1970s

1970 * Rodney Steel rejected the validity of the Ceratosauria and Ceratosauridae. 1979 Majungasaurus skull

Hans-Dieter Sues Hans-Dieter Sues (born January 13, 1956) is a German-born American paleontologist who is Senior Scientist and Curator of Vertebrate Paleontology at the National Museum of Natural History of the Smithsonian Institution in Washington, DC. He receiv ...

and

Philippe Taquet Philippe Taquet (b. April 25, 1940 Saint-Quentin, Aisne) is a French paleontologist who specializes in dinosaur systematics of finds primarily in northern Africa. He is a member of the French Academy of Sciences since November 30, 2004, president ...

described the new genus and species '' Majungatholus atopus''. *

Alan Jack Charig Alan Jack Charig (1 July 1927 – 15 July 1997) was an English palaeontologist and writer who popularised his subject on television and in books at the start of the wave of interest in dinosaurs in the 1970s. Charig was, though, first and fo ...

rejected the validity of the Ceratosauria and Ceratosauridae.

1980s

1980 *

José Bonaparte José Fernando Bonaparte (14 June 1928 – 18 February 2020) was an Argentine paleontologist who discovered a plethora of South American dinosaurs and mentored a new generation of Argentine paleontologists . One of the best-known Argentine paleo ...

and Jaime Powell described the new genus and species ''

Noasaurus leali ''Noasaurus'' ("Northwestern Argentina lizard") is a genus of ceratosaurian theropod dinosaur genus from the late Campanian-Maastrichtian (Late Cretaceous) of Argentina. The type and only species is ''N. leali''. Discovery and naming In the m ...

''. They classified it in a new family, the

Noasauridae Noasauridae is an extinct family of theropod dinosaurs belonging to the group Ceratosauria. They were closely related to the short-armed abelisaurids, although most noasaurids had much more traditional body types generally similar to other ther ...

. 1985

* Bonaparte and

Fernando Emilio Novas Fernando Emilio Novas (born 1960) is an Argentine paleontologist working for the Comparative Anatomy Department of the Bernardino Rivadavia Natural Sciences Museum in Buenos Aires, Argentina.

described the new genus and species ''

Abelisaurus comahuensis ''Abelisaurus'' (; "Abel's lizard") is a genus of predatory abelisaurid theropod dinosaur alive during the Late Cretaceous Period (Campanian) of what is now South America. It was a bipedal carnivore that probably reached about in length, althou ...

''. * Bonaparte described the new genus and species ''

Carnotaurus sastrei ''Carnotaurus'' (; ) is a genus of theropod dinosaur that lived in South America during the Late Cretaceous period, probably sometime between 71 and 69 million years ago. The only species is ''Carnotaurus sastrei''. Known from a single well-p ...

''. 1986 * Robert T. Bakker thought the loose joints in the skull of ''Ceratosaurus'' was an adaptation allowing it to swallow prey that would otherwise be too large. * Ricardo Martínez and others described the new genus and species '' Xenotarsosaurus bonapartei''. * Gauthier "resurrected the name Ceratosauria" to apply to the sister group of the

tetanuran Tetanurae (/ˌtɛtəˈnjuːriː/ or "stiff tails") is a clade that includes most theropod dinosaurs, including megalosauroids, allosauroids, tyrannosauroids, ornithomimosaurs, compsognathids and maniraptorans (including birds). Tetanurans ar ...

theropods. However, while he listed the members of his Ceratosauria, he did not propose a formal phylogenetic definition. 1989 * Rowe formally defined the Ceratosauria as theropods more closely related to ''Ceratosaurus nasicornis'' than birds, based on Gauthier's 1986 usage of the term.

1990s

1990 * Rowe and Gauthier published a node-based definition of Ceratosauria. 1991 *

Jean Le Loeuff Jean may refer to: People * Jean (female given name) * Jean (male given name) * Jean (surname) Fictional characters * Jean Grey, a Marvel Comics character * Jean Valjean, fictional character in novel ''Les Misérables'' and its adaptations * Jean ...

and

Eric Buffetaut The given name Eric, Erich, Erikk, Erik, Erick, or Eirik is derived from the Old Norse name ''Eiríkr'' (or ''Eríkr'' in Old East Norse due to monophthongization). The first element, ''ei-'' may be derived from the older Proto-Norse ''* ain ...

described the new genus and species '' Tarascosaurus salluvicus''. * Bonaparte described the new genus and species '' Velocisaurus unicus''. * Novas regarded the Ceratosauria as consisting of two sister groups, the

Coelophysoidea Coelophysoidea were common dinosaurs of the Late Triassic and Early Jurassic periods. They were widespread geographically, probably living on all continents. Coelophysoids were all slender, carnivorous forms with a superficial similarity to the ...

and their sister group, the Neoceratosauria. 1994 *

Thomas Holtz Thomas Richard Holtz Jr. (born September 13, 1965) is an American vertebrate palaeontologist, author, and principal lecturer at the University of Maryland's Department of Geology. He has published extensively on the phylogeny, morphology, ecomorp ...

named the Coelophysoidea, then thought to be ceratosaurs. He defined them as all theropods more closely related to ''Coelophysis'' than to ''Ceratosaurus''. Holtz defined the Neoceratosauria as all theropods closer to ''Ceratosaurus'' than to ''Coelophysis''. He also defined the ceratosaur subclade

Abelisauroidea Abelisauroidea is typically regarded as a Cretaceous group, though the earliest abelisauridae remains are known from the Middle Jurassic of Argentina (classified as the species Eoabelisaurus mefi) and possibly Madagascar (fragmentary remains of ...

as all theropods closer to ''Carnotaurus sastrei'' than to ''Ceratosaurus nasicornis''. 1995 * Hugues Accarie and others described the new genus and species '' Genusaurus sisteronis''. 1996 * Bonaparte described the new genus and species ''

Ligabueino andesi ''Ligabueino'' (meaning "Ligabue's little one") is a genus of noasaurid dinosaur named after its discoverer, Italian doctor Giancarlo Ligabue. It is known only from an extremely fragmentary specimen, measuring 79 cm (2.6 ft) long, foun ...

''. *

Sankar Chatterjee Sankar Chatterjee (born May 28, 1943) is a paleontologist, and is the Paul W. Horn Professor of Geosciences at Texas Tech University and Curator of Paleontology at the Museum of Texas Tech University. He earned his Ph. D. from the University of ...

and Dhiraj Kumar Rudra observed that abelisaur teeth had lower crowns than other carnivorous dinosaurs either within or outside of Ceratosauria. 1998 Majungasaurus BW

* Coria and

Leonardo Salgado Leonardo Salgado is an Argentinean palaeontologist with a special interest in dinosaurs of the Cretaceous period and other investigations of the palaeobiology of fossil bearing geological formations. Salgado is the leading or coauthor of several t ...

described the new genus and species '' Ilokelesia aguagrandensis''. * Sereno redefined Ceratosauria as all neotheropods closer to ''Coelophysis bauri'' than to birds. However, this definition never received broad acceptance by the scientific community because the Rowe had already defined the group in 1989, and therefore had priority. He also split the Abelisauridae into two subfamilies; the Abelisaurinae (all abelisaurids more closely related to ''Abelisaurus'' than to ''Carnotaurus'') and Carnotaurinae (all abelisaurids more closely related to ''Carnotaurus'' than to ''Abelisaurus''). * Sampson and others described a more complete specimen of ''Majungatholus atops''. They performed an X-ray CT scan of the skull of ''Majungatholus atopus''. They found that the dome on the animal's skull formed of its frontal bone was actually hollow. This suggests that this structure was purely for display rather than used in fights between ''Majungatholus''.

21st century

2000s

2000 * Madsen and Welles described the new species '' Ceratosaurus dentisulcatus'' and '' C. magnicornis''. 2001 * Sampson, Carrano, and Forster described the new genus and species ''

''. They noted that at least six individuals were preserved together. This makes ''Masiakasaurus'' the first neoceratosaur to be preserved in association with others of its species. 2002

* Coria, Chiappe, and Dingus described the new genus and species ''

Aucasaurus garridoi ''Aucasaurus'' is a genus of medium-sized abelisaurid theropod dinosaur from Argentina that lived during the Late Cretaceous (Santonian to Campanian stage) of the Anacleto Formation. It was smaller than the related ''Carnotaurus'', although more ...

''. * Kellner and Campos described the new genus and species '' Pycnonemosaurus nevesi''. 2003 * Wilson and others described the new genus and species '' Rajasaurus narmadensis''. 2004 * Calvo, Rubilar-Rogers and Moreno described the new genus and species '' Ekrixinatosaurus novasi''. * P. C. Sereno, J. A. Wilson, and J. L. Conrad described the new genus and species '' Rugops primus'' as well as the new genus ''

Spinostropheus ''Spinostropheus'' is a genus of carnivorous ceratosaurian theropod dinosaur that lived in the Middle Jurassic period and has been found in the Tiouraren Formation, Niger. The type species, type and only species is ''S. gautieri''. History of d ...

''. 2006 * Malkani described the new genus and species '' Vitakridrinda sulaimani''.

2007 * Allain and others described the new genus and species '' Berberosaurus liassicus''. 2008 * Sereno and Brusatte described the new genus and species '' Kryptops palaios''. * Canale and others described the new genus and species '' Skorpiovenator bustingorryi''. 2009 * Xu and others described the new genus and species ''

Limusaurus inextricabilis ''Limusaurus'' is a genus of theropod dinosaur that lived in what is now China during the Late Jurassic, around 161 to 157 million years ago. The type and only species ''Limusaurus inextricabilis'' was described in 2009 from specimens ...

''.

2010s

2010 * M. D. Ezcurra, F. L. Agnolin, and Novas described the new genus and species '' Austrocheirus isasii''. * Novas and others described the new genus and species '' Rahiolisaurus gujaratensis''. 2012 * Pol and Rauhut described the new genus and species '' Eoabelisaurus mefi''. 2013

* Farke and Sertich described the new genus and species '' Dahalokely tokana''. * Tortosa and others described the new genus and species '' Arcovenator escotae''. 2014 * Sánchez-Hernández and Benton described the new genus and species ''

Camarillasaurus cirugedae ''Camarillasaurus'' (meaning " Camarillas lizard") is a genus of spinosaurid dinosaur from the Early Cretaceous period (Barremian) of Camarillas, Teruel Province, in what is now northeastern Spain. Described in 2014, it was originally identifie ...

''. * Sebastian G. Dalman described the new genus and species ''

Fosterovenator ''Fosterovenator'' (meaning "Foster's hunter") is a genus of ceratosaur dinosaur known from the Late Jurassic Morrison Formation of Wyoming. The holotype is YPM VP 058267A, B, and C, a tibia with an articulated astragalus. An additional specime ...

''. 2016 * Filippi and others described the new genus and species '' Viavenator exxoni''. 2017 * Longrich and others described the new genus and species '' Chenanisaurus barbaricus''. 2018 * Dal Sasso and others described the new genus and species ''

Saltriovenator zanellai ''Saltriovenator'' (meaning " Saltrio hunter") is a genus of ceratosaurian dinosaur that lived during the Sinemurian stage of the Early Jurassic in what is now Italy. The type and only species is ''Saltriovenator zanellai''; in the past, the sp ...

''. * Delcourt and Iori described the new genus and species ''

Thanos simonattoi ''Thanos'' (named for the Marvel Comics character) is a genus of carnivorous brachyrostran abelisaurid dinosaur that lived in Brazil during the Santonian stage of the late Cretaceous Period. It contains only a single species known as ''T. simo ...

''. 2019 * Partially preserved ilium of an indeterminate

abelisaur Abelisauroidea is typically regarded as a Cretaceous group, though the earliest abelisauridae remains are known from the Middle Jurassic of Argentina (classified as the species Eoabelisaurus mefi) and possibly Madagascar (fragmentary remains o ...

theropod is reported from the

Upper Cretaceous The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the ...

Kem Kem Beds The Kem Kem Group (commonly known as the Kem Kem beds) is a geological group in the Kem Kem region of eastern Morocco, whose strata date back to the Cenomanian stage of the Late Cretaceous. Its strata are subdivided into two geological formations, ...

(

Morocco Morocco (),, ) officially the Kingdom of Morocco, is the westernmost country in the Maghreb region of North Africa. It overlooks the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to ...

) by Zitouni ''et al.'' (2019). * Langer and others described the new genus and species ''

Vespersaurus paranaensis ''Vespersaurus'' (meaning "western lizard") is a genus of noasauridae, noasaurid theropod dinosaur from the Late Cretaceous Rio Paraná Formation in the Paraná Basin, Brazil. The type species, type and only species is ''V. paranaensis'', which wo ...

''.

2020s

2020 * Cerronia and others described the new genus and species '' Tralkasaurus cuyi''.

Footnotes

References

* * * * * * * * * * * * * * * * * * * *

External links

* {{Portal bar, Dinosaurs, Paleontology, Cretaceous, Mesozoic, History of science *

ceratosaur Ceratosaurs are members of the clade Ceratosauria, a group of dinosaurs defined as all theropods sharing a more recent common ancestor with ''Ceratosaurus'' than with birds. The oldest known ceratosaur, ''Saltriovenator'', dates to the earlies ...

19th century

1880s

1890s

20th century

1900s

1910s

1920s

1930s

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21st century

2000s

2010s

2020s

See also

Footnotes

References

External links