Barremian dinosaurs

Iguanodon ( ; meaning 'iguana-tooth'), named in 1825, is a genus of iguanodontian dinosaur. While many species found worldwide have been classified in the genus Iguanodon, dating from the Late Jurassic to Early Cretaceous, taxonomic revision in the early 21st century has defined Iguanodon to be based on at least one well-substantiated species: Iguanodon bernissartensis, which lived during the Barremian to early Aptian ages of the Early Cretaceous in Belgium, Germany, England, and Spain, between about 126 and 122 million years ago. Iguanodon was a large, bulky herbivore, measuring up to in

Baryonyx () is a genus of theropod dinosaur which lived in the Barremian stage of the Early Cretaceous period, about 130–125 million years ago. The first skeleton was discovered in 1983 in the Smokejack Clay Pit, of Surrey, England, in sediments of the Weald Clay Formation, and became the holotype specimen of Baryonyx walkeri, named by palaeontologists Alan J. Charig and Angela C. Milner in 1986. The genus name Baryonyx comes from Ancient Greek βαρύς (barús), meaning "heavy" or "strong", and ὄνυξ (ónux), meaning "claw", alluding to the animal's very large claw on the first finger; the specific

Amargasaurus (; "La Amarga lizard") is a genus of sauropod dinosaur from the Early Cretaceous epoch (129.4–122.46 mya) of what is now Argentina. The only known skeleton was discovered in 1984 and is virtually complete, including a fragmentary skull, making Amargasaurus one of the best-known sauropods of its epoch. Amargasaurus was first described in 1991 and contains a single known species, Amargasaurus cazaui. It was a large animal, but small for a sauropod, reaching in length. Most distinctively, it sported two parallel rows of tall spines down its neck and back, taller than in any other kno

Hypsilophodon (; meaning "high-crested tooth") is a neornithischian dinosaur genus from the Early Cretaceous period of England. It has traditionally been considered an early member of the group Ornithopoda, but recent research has put this into question.

genus of small tyrannosauroid dinosaur (fossil)

Sinosauropteryx (meaning "Chinese reptilian wing") is an extinct genus of coelurosaurian theropod dinosaurs. Described in 1996, it was the first dinosaur taxon outside of Avialae (birds and their immediate relatives) to be found with evidence of feathers. It was covered with a coat of very simple filament-like feathers. Structures that indicate the colour pattern have also been preserved in some of its feathers, which show that Sinosauropteryx had a countershading pattern in its body with a banded tail. The reddish brown colouration previously inferred for Sinosauropteryx is based on the melan

Sinornithosaurus (derived from a combination of Latin and Greek, meaning 'Chinese bird-lizard') is a genus of feathered dromaeosaurid dinosaur from the early Cretaceous Period (late Barremian) of the Yixian Formation in what is now China. It was the fifth non–avian feathered dinosaur genus discovered by 1999. The original specimen was collected from the Sihetun locality of western Liaoning. It was found in the Jianshangou beds of the Yixian Formation, dated to 124.5 million years ago. Additional specimens have been found in the younger Dawangzhangzi bed, dating to around 122 million years ago.

Yutyrannus (meaning "feathered tyrant") is a genus of proceratosaurid tyrannosauroid dinosaur which contains a single known species, Yutyrannus huali. This species lived during the early Cretaceous period in what is now northeastern China. Three fossils of Yutyrannus huali — all found in the rock beds of Liaoning Province — are the largest-known dinosaur specimens that preserve direct evidence of feathers.

Polacanthus (from the Ancient Greek polys-/πολύς- "many" and akantha/ἄκανθα "thorn" or "prickle") is an extinct genus of ankylosaurian dinosaurs from the early Cretaceous (130–125 million years ago) of England. Several species have been named in the genus Polacanthus, but only the type species, Polacanthus foxii, is currently seen as valid. There are not many fossil remains of this dinosaur, and some important anatomical features, such as its skull, are poorly known. It grew to about long. Its body was covered with armour plates and spikes. It may be a basal member of the Nodosauridae or part

Caudipteryx (meaning "tail feather") is a genus of small oviraptorosaurian dinosaurs that lived in China during the Early Cretaceous, around 124.6 million years ago. They were feathered and extremely bird-like in their overall appearance, to the point that some paleontologists suggested it was a bird. Two species have been described: C. zoui (the type species), in 1998, and C. dongi, in 2000. Caudipteryx had a stout trunk, long legs, and was probably a swift runner. Its discovery has led to many intensive studies and debate over the relationship between birds and dinosaurs.

Wuerhosaurus is an extinct genus of stegosaurine stegosaur dinosaurs from the Early Cretaceous of China. The genus contains two species, Wuerhosaurus homheni, the type species named in 1973, and Wuerhosaurus ordosensis, named in 1993. It is one of the youngest (most recent) known stegosaurs in the fossil record, alongside Mongolostegus and Yanbeilong.

Concavenator (meaning "Cuenca hunter") is a genus of carcharodontosaurian dinosaur that lived in Spain during the Early Cretaceous epoch, about 125 million years ago. The genus contains a single species, Concavenator corcovatus, named and described in 2010 from a nearly complete skeleton collected from the Las Hoyas fossil site of the La Huérguina Formation.

Beipiaosaurus is a genus of therizinosauroid theropod dinosaurs that lived in China during the Early Cretaceous in the Yixian Formation. The first remains were found in 1996 and formally described in 1999. Before the discovery of Yutyrannus, Beipiaosaurus were among the heaviest dinosaurs known from direct evidence to be feathered. Beipiaosaurus is known from three reported specimens. Numerous impressions of feather structures were preserved that allowed researchers to determine the feathering color which turned out to be brownish.

Pelecanimimus (meaning "pelican mimic") is an extinct genus of basal ("primitive") ornithomimosaurian dinosaur from the Early Cretaceous of Spain. It is notable for possessing more teeth than any other member of the Ornithomimosauria (or any other theropod), most of which were toothless.

Neovenator (nˈiːə͡ʊvˌɛne͡ɪtə; "new hunter") is an extinct genus of carcharodontosaurian theropod dinosaur. It is known primarily from several skeletons found in the Early Cretaceous (Hauterivian–Barremian) Wessex Formation on the south coast of the Isle of Wight, southern England. The first remains of Neovenator were discovered in 1978 alongside those of the ornithopod Brighstoneus, after the collapse of part of Grange Chine. In 1996, Steve Hutt, David Martill and Michael Barker named the genus Neovenator. One species is known: the type species, N. salerii, after the Salero family who owned th

Eotyrannus (meaning "dawn tyrant") is a genus of tyrannosauroid theropod dinosaur hailing from the Early Cretaceous Wessex Formation beds, included in Wealden Group, located in the southwest coast of the Isle of Wight, United Kingdom. The remains (MIWG1997.550), consisting of assorted skull, axial skeleton and appendicular skeleton elements, from a juvenile or subadult, found in a plant debris clay bed, were described by Stephen Hutt and colleagues in early 2001. The etymology of the generic name refers to the animal's classification as an early tyrannosaur or "tyrant lizard", while the specif

Jinfengopteryx (from , 'golden phoenix', the queen of birds in Chinese folklore, and , meaning 'feather') is a genus of maniraptoran dinosaur. It was found in the Qiaotou Member of the Huajiying Formation of Hebei Province, China, and is therefore of uncertain age. The Qiaotou Member may correlate with the more well-known Early Cretaceous Yixian Formation, and so probably dates to around 122 Ma (122 million years) ago.

Protarchaeopteryx (meaning "before Archaeopteryx" although it is from the Cretaceous and Archaeopteryx is from the Jurassic) is a genus of turkey-sized feathered theropod dinosaur from China. Known from the Jianshangou bed of the Yixian Formation, it lived during the early Aptian age of the Early Cretaceous, approximately 124.6 million years ago. It was probably a herbivore or omnivore, although its hands were very similar to those of small carnivorous dinosaurs. It appears to be one of the most basal members of the Oviraptorosauria, closely related to Incisivosaurus, or a taxon slightly

Incisivosaurus ("incisor lizard") is a genus of small, probably herbivorous theropod dinosaurs from the early Cretaceous Period of what is now the People's Republic of China. The first specimen to be described (by Xu et al. in 2002), IVPP V13326, is a skull that was collected from the lowermost levels (the fluvial Lujiatun beds) of the Yixian Formation (dating to the Barremian stage about 126 million years ago) in the Sihetun area, near Beipiao City, in western Liaoning Province. The most significant, and highly unusual, characteristic of this dinosaur is its apparent adaptation to an herbivor

Yaverlandia (meaning "of Yaverland Point/Yaverland Battery") is an extinct genus of possible dinosaur known from two partial fossil skulls found in Lower Cretaceous strata of the Wessex Formation (Upper Silty Bed) in the Isle of Wight, England. When the first known specimen, MIWG 1530, was first described in 1930 by D. M. S. Watson, similarities were noted with the ornithopod genus Vectisaurus (now Mantellisaurus) and the theropod genus Troodon. In 1936, it was ultimately assigned to the former. It was recognised as a distinct genus in 1971 by Peter Galton, who re-examined the remains. Galton

Aristosuchus (from the Ancient Greek ἄριστος, meaning "bravest, best, noblest", and σουχος, the Ancient Greek corruption of the name of the Egyptian crocodile-headed god Sobek) is a genus of small coelurosaurian dinosaur that lived in the Early Cretaceous period (Barremian stage, sometime between 130 and 123 million years ago) of what is now England, UK. The type and only species is Aristosuchus pusillus, originally referred to the carnosaurian genus Poekilopleuron.

Sinocalliopteryx (meaning 'Chinese beautiful feather') is a genus of carnivorous coelurosaurian theropod dinosaurs from the Lower Cretaceous Yixian Formation of China (Jianshangou Beds, dating to 124.6 Ma). While similar to the related Huaxiagnathus, Sinocalliopteryx were larger. In 2007, the type specimen was the largest known compsognathid exemplar, at in length. In 2012, an even larger specimen was reported.

Qantassaurus ( ) is a genus of basal two-legged, plant-eating elasmarian ornithischian dinosaur that lived in Australia about 125-112 million years ago, when the continent was still partly south of the Antarctic Circle. It was described by Patricia Vickers-Rich and her husband Tom Rich in 1999 after a find near Inverloch, and named after Qantas, the Australian airline.

Zapalasaurus is an extinct genus of sauropod dinosaur from the Early Cretaceous-aged La Amarga Formation of what is today Patagonia. The type and only species is Z. bonapartei.

Sinovenator (meaning "Chinese hunter") is a genus of troodontid dinosaur from China. It is from the early Cretaceous Period.

Huaxiagnathus is an extinct genus of coelurosaurian theropod dinosaur from the Lower Cretaceous of China. The genus contains a single species, Huaxiagnathus orientalis, known from two immature individuals from the Yixian Formation. Huaxiagnathus may represent an earlier ontogenetic stage of the tyrannosauroid Sinotyrannus from the younger Jiufotang Formation.

Mantellisaurus is a genus of iguanodontian dinosaur that lived in the Barremian and early Aptian ages of the Early Cretaceous Period of Europe. Its remains are known from Belgium (Bernissart), England, Spain and Germany. The type and only species is M. atherfieldensis. Formerly known as Iguanodon atherfieldensis, the new genus Mantellisaurus was erected for the species by Gregory Paul in 2007. According to Paul, Mantellisaurus was more lightly built than Iguanodon and more closely related to Ouranosaurus, making Iguanodon in its traditional sense paraphyletic. It is known from many complete an

Liaoceratops, meaning "Liaoning horned face", is a ceratopsian dinosaur believed to be an early relative of the horned ceratopsids. It lived in the Early Cretaceous, 126 million years ago. It was discovered in China by a team of American and Chinese scientists. Liaoceratops was much smaller than its later relatives, but offers a glimpse into the early evolution of this group of dinosaurs. ==Discoveries and naming== left|thumb|Skeletal restoration Liaoceratops was discovered in the famous Liaoning Province of China, where several fossils of feathered dinosaurs have also been collected. The type

Tianyuraptor is a genus of short-armed dromaeosaurid dinosaur ('running lizard'; a type of small dinosaur considered to be closely related to birds) that lived during the Early Cretaceous, about 122 million years ago. Its remains have been found in western Liaoning, China. It was similar to other dromaeosaurids found in Liaoning, with the exception of being somewhat more primitive. The type specimen, formally named in 2009, shows features not seen in previously known Northern Hemisphere (Laurasian) dromaeosaurids, but present in Southern Hemisphere (Gondwanan) species and early birds. Because

Graciliraptor (meaning "graceful thief") is a genus of microraptorian dromaeosaurid dinosaur from the early Cretaceous Period. Its fossil, holotype IVPP V 13474, was found in Beipiao, Liaoning Province, China. The type species is Graciliraptor lujiatunensis, named and described in 2004 by Xu Xing and Wang Xiaoling. The generic name is derived from Latin gracilis (meaning "graceful") and raptor (meaning "thief"). The specific name refers to the village of Lujiatun where the fossil site is located.

Wakinosaurus (meaning "Wakino lizard") is a genus of possible carcharodontosaurid theropod dinosaur from the Early Cretaceous (Valanginian-Barremian) Sengoku Formation of Kyushu, Japan. The genus is a tooth taxon, based solely on the middle section of a single tooth.

Zhenyuanlong (meaning ''"Zhenyuan's dragon", from Chinese Pinyin 龙/龍 lóng "dragon") is a genus of dromaeosaurid dinosaur from the Yixian Formation of Liaoning, China. It lived during the Aptian age of the early Cretaceous period, approximately 125 million years ago. It is known from a single specimen belonging to the species Zhenyuanlong suni'' (Chinese: 孫氏振元龍). This type specimen preserved a nearly complete skeleton that contains traces of feathers, including long tail feathers and large wings. In addition to further complicating diversity of Liaoning dromaeosaurids, this specimen provides th

Lanzhousaurus (meaning "Lanzhou lizard") is a genus of ornithopod dinosaur that lived in the Gansu region of what is now China during the Early Cretaceous (Barremian). Described by You, Ji, and Li in 2005, the type and only species is Lanzhousaurus magnidens, known from a partial skeleton recovered from the Hekou Group. It has been estimated to be about in length and in weight.

Jeholosaurus is a genus of small neornithischian dinosaur from the Early Cretaceous-aged Yixian Formation of what is now China.

Changyuraptor is a genus of "four-winged", predatory dinosaurs. It is known from a single fossil specimen representing the species Changyuraptor yangi, which was discovered from Early Cretaceous (125 million year old) deposits in Liaoning Province, China. C. yangi belongs to the group of dromaeosaurid theropod dinosaurs called the Microraptoria.

Liaoningosaurus (meaning "Liaoning lizard") is an unusual genus of basal ankylosaurid dinosaur from the Liaoning Province, China that lived during the Early Cretaceous (late Barremian to early Aptian stages, ~125.4 to 118.9 Ma) in what is now the Yixian and Jiufotang Formation. The type and only species, Liaoningosaurus paradoxus, is known from more than 20 specimens, represented by juvenile individuals. It was named in 2001 by Xu, Wang and You.

Ornithodesmus (meaning "bird link") is a genus of small, dromaeosaurid dinosaur from the Isle of Wight in England, dating to about 125 million years ago. The name, along with that of the type and only species, O. cluniculus, was originally assigned to a bird-like sacrum (a series of vertebrae fused to the hip bones), initially believed to come from a bird and subsequently identified as a pterosaur. More complete pterosaur remains were later assigned to Ornithodesmus. More recently, a detailed analysis determined that the original specimen in fact came from a small theropod, specifically a drom

Vallibonavenatrix (meaning "Vallibona huntress" after the town near where its remains were found) is a genus of spinosaurid dinosaur from the Early Cretaceous (Barremian) Arcillas de Morella Formation of Castellón, Spain. The type and only species is Vallibonavenatrix cani, known from a partial skeleton.

Shenzhousaurus (meaning "Shenzhou lizard") is a genus of basal ornithomimosaurian theropod dinosaur from the Lower Cretaceous of China.left|thumb|RestorationThe holotype (NGMC 97–4–002, National Geological Museum of China) was collected from near the bottom (fluvial beds) of the Yixian Formation (Aptian) at the Sihetun fossil site, Beipiao, western Liaoning Province. This specimen consists of a partial skeleton preserved on a sandstone slab in a "death pose," its head above the torso. The distal parts of the hindlimbs, distal portion of the tail, and the forelimbs (except for part of the right

Demandasaurus (meaning "Demanda lizard") is a genus of rebbachisaurid sauropod dinosaur from early Cretaceous (late Barremian — early Aptian stage) deposits of Spain. Demandasaurus is known from an incomplete but associated skeleton that includes cranial and postcranial remains. It was collected from the Castrillo de la Reina Formation in Burgos Province. It was first named by Fidel Torcida Fernández-Baldor, José Ignacio Canudo, Pedro Huerta, Diego Montero, Xabier Pereda Suberbiola, and Leonardo Salgado in 2011, and the type species is Demandasaurus darwini.

thumb|left|Size compared to a human; anatomical details are speculative Ligabueino (meaning "Ligabue's little one") is a genus of abelisauroid theropod 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, found in the La Amarga Formation. In spite of initial reports that it was an adult, the unfused vertebrae indicate that the specimen was a juvenile. It was a theropod and lived during the Early Cretaceous Period (Barremian to early Aptian), in what is now Patagonia. Contrary to

Camarillasaurus (meaning "Camarillas lizard") is an extinct genus of spinosaurid theropod dinosaurs from the Early Cretaceous period (Barremian) of Camarillas, Teruel Province, in what is now northeastern Spain. Described in 2014, it was originally identified as a ceratosaurian theropod, but later studies suggested affinities to the Spinosauridae. Camarillasaurus is one of several spinosaurid taxa known from the Iberian peninsula, the others being Iberospinus, Protathlitis, Baryonyx, Riojavenatrix, and Vallibonavenatrix.

Amargatitanis (meaning "Amarga giant") is a genus of dicraeosaurid sauropod dinosaur (a type of large, long-necked quadrupedal herbivorous dinosaur) from the Barremian-aged (Lower Cretaceous) La Amarga Formation of Neuquén, Argentina. It is known from a single, incomplete postcranial skeleton consisting of a partial hindlimb, ischium, and two vertebrae. These remains were unearthed by Argentine paleontologist José Bonaparte in 1983 during an expedition by the Museo Argentino de Ciencias Naturales and later described as a new genus and species, Amargatitanis macni by Sebastián Apesteguía. The g

Iberospinus (meaning "Iberian spine") is an extinct genus of spinosaurid dinosaur from the Early Cretaceous (Barremian) Papo Seco Formation of Portugal. The genus contains a single species, I. natarioi, known from several assorted bones belonging to one individual. Iberospinus represents one of five known spinosaurid taxa from the Iberian Peninsula, the others being Camarillasaurus, Protathlitis, Riojavenatrix, and Vallibonavenatrix. It is important for its implications of the geographical origin of Spinosauridae and the suggested presence of potentially semi-aquatic lifestyle earlier in the e

Ceratosuchops (meaning "horned crocodile face") is a genus of spinosaurid from the Early Cretaceous (Barremian) Wessex Formation of Britain. The type species is C. inferodios, known from skull fragments (a snout tip and a partial braincase) recovered between 2013–2017 from Chilton Chine on the Isle of Wight, and housed at the Dinosaur Isle Museum in Sandown. It was named in 2021 by a team consisting of Chris Tijani Barker, Darren Naish, David W. E. Hone, and colleagues, alongside Riparovenator milnerae.

Shaochilong (meaning "shark toothed dragon") is an extinct genus of tetanuran theropod dinosaurs from the Early Cretaceous (Barremian to Albian stages) Miaogou Formation of China, though a more restrictive suggestion from the Aptian to the Albian has been suggested based on faunal composition. It was usually described as a carcharodontosaurid, but other phylogenies have suggested a different position as a tyrannosauroid or as a member of polytomic allosauroid. The genus contains a single species, Shaochilong maortuensis, which was originally placed in the genus Chilantaisaurus as C. maortuensi

Kelmayisaurus (meaning "Karamay lizard") is an extinct genus of carcharodontosaurian theropod dinosaur from the Early Cretaceous. It was roughly long and its name refers to the petroleum-producing city of Karamay in the Xinjiang province of western China near where it was found.

Dakotadon (meaning "Dakota tooth") is a genus of iguanodont dinosaur from the Early Cretaceous (Valanginian to Barremian) Lakota Formation of South Dakota, USA, known from a partial skull. It was first described in 1989 as Iguanodon lakotaensis, by David B. Weishampel and Philip R. Bjork. Its assignment has been controversial. Some researchers suggested that "I." lakotaensis was more basal than I. bernissartensis, and related to Theiophytalia, but David Norman has suggested that it was a synonym of I. bernissartensis. Gregory S. Paul, working on a revision of iguanodont species, gave "I." lako

Gideonmantellia is an extinct genus of basal ornithopod dinosaur known from the Early Cretaceous (Barremian stage) Camarillas Formation of Galve, Province of Teruel, Spain. It contains a single species, Gideonmantellia amosanjuanae.

Hoplitosaurus (meaning "Hoplite lizard") was a genus of armored dinosaur related to Polacanthus. It was named from a partial skeleton found in the Barremian (Early Cretaceous) Lakota Formation of Custer County, South Dakota. It is an obscure genus which has been subject to some misinterpretation of its damaged remains. Although there was a push to synonymize it with Polacanthus in the late 1980s-early 1990s, Hoplitosaurus has been accepted as a valid albeit poorly known genus in more recent reviews.

Shanag is a genus of paravian theropod dinosaur from the Early Cretaceous Period of Mongolia. It may be a dromaeosaurid, but some researchers are skeptical of this classification. The type species is S. ashile.

Calamosaurus (meaning "reed lizard") is a genus of small theropod dinosaur, from the Early Cretaceous of the Isle of Wight, England. It is based on two cervical vertebrae (NHMUK PV R 901), collected by Reverend William Fox. These fossils come from sedimentary rocks of the Wessex Formation and are Barremian in age. The type species of Calamosaurus, named Calamospondylus foxi by Richard Lydekker, was named in honour of Fox. Calamospondylus, however, was a preoccupied name, forcing Lydekker to change the genus name to Calamosaurus. This has subsequently led to immense confusion, with some authors

Jinzhousaurus is a genus of hadrosauroid dinosaur of the Early Cretaceous of China. The type species is Jinzhousaurus yangi. The generic name refers to the town Jinzhou. The specific name honours Yang Zhongjian is the founder of Chinese paleontology. It was first described by Wang Xiao-lin and Xu Xing in 2001.

Yixianosaurus (meaning "Yixian lizard") is a maniraptoran theropod dinosaur genus from the Early Cretaceous of China.

Ornithopsis (meaning "bird-likeness") is a genus of sauropod dinosaur from the Early Cretaceous of England and possibly Germany. The type species, which is the only species seen as valid today, is O. hulkei, which is only known from fragmentary remains.

Chondrosteosaurus (meaning "cartilage and bone lizard") is a dubious genus of sauropod dinosaur from the Early Cretaceous Wessex Formation of England. Two species have been named: C. gigas and C. magnus, both of which are now considered invalid.

Dongbeititan is a genus of sauropod dinosaur from the Early Cretaceous Yixian Formation of Beipiao, Liaoning, China. It is based on holotype DNHM D2867, a partial postcranial skeleton including bones from the limbs, shoulder and pelvic girdles, and vertebrae, which was described in 2007. Its describers suggested it was as a basal titanosauriform, not as derived as Gobititan or Jiutaisaurus, but more derived than Euhelopus, Fusuisaurus, and Huanghetitan. The type species is D. dongi, and it is the first named sauropod from the Yixian Formation, which is part of the well-known Jehol Group. The g

Protathlitis (meaning "champion") is a potentially dubious and chimeric genus of theropod dinosaur from the Early Cretaceous (Barremian) Arcillas de Morella Formation of Castellón, Spain. The type and only species is Protathlitis cinctorrensis, known from a partial skeleton. It was originally identified as a basal member of the Baryonychinae. If a spinosaurid identity of the material is correct, its discovery, as well as those of the spinosaurids Camarillasaurus, Iberospinus, Riojavenatrix, and the contemporary Vallibonavenatrix shows that the Iberian Peninsula held a diverse assemblage of the

Sinusonasus is a genus of dinosaurs from the Early Cretaceous Period, recovered from the Yixian Formation. It lived in what is now the Liaoning Province of China. Sinusonasus was a theropod, specifically a troodontid dinosaur.

Xinjiangovenator (meaning "Xinjiang hunter") is a genus of coelurosaurian dinosaurs, possibly part of the group Maniraptora, which lived in the Lianmuqin Formation of the Tugulu Group of China, dated to the Early Cretaceous period, sometime between the Valanginian and Albian stages.