Reconstruction of Psittacosaurus mongoliensis（Image source：Connor Ashbridge， CC BY 4.0 ） Age Cretaceous（Aptian-Albian） 121.4-100.5 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Ornithischia Clade: Ceratopsia Family: Psittacosauridae Genus: Psittacosaurus Species: Psittacosaurus mongoliensis Morphological description Psittacosaurus mongoliensis was a small- to medium-sized ceratopsian dinosaur characterized by a short, deep skul

Reconstruction of Yutyrannus huali（Image source：TotalDino， CC BY 4.0 ） Age Cretaceous（Barremian） 125 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Superfamily: Tyrannosauroidea Family: Proceratosauridae Genus: Yutyrannus Species: Yutyrannus huali Morphological description Yutyrannus huali was a gigantic basal tyrannosauroid dinosaur, with a femoral length of approximately 85 cm and an estimated bo

Reconstruction of Invictibellatrix amberina (Image source: TotalDino, CC BY 4.0) Age Cretaceous（Barremian） 125.77-121.4 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Clade: Megaraptora Genus: Invictibellatrix Species: Invictibellatrix amberina Morphological description Invictibellatrix amberina is a relatively small-bodied megaraptoran theropod dinosaur known from a single incomplete braincase, de

Reconstruction of Infernogallus jamesi（Image source：Connor Ashbridge， CC BY 4.0 ） Age Cretaceous（Maastrichtian） 67-66 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Clade: Oviraptorosauria Superfamily: Caenagnathoidea Family: Caenagnathidae Genus: Infernogallus Species: Infernogallus jamesi Morphological description Infernogallus jamesi was a small caenagnathid dinosaur belonging to Oviraptorosauri

Life reconstruction of Tromerosaurus solumons（Image source：Connor Ashbridge， CC BY 4.0 ） Age Cretaceous（Campanian） 76.72-76.35 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Family: Tyrannosauridae Subfamily: Albertosaurinae Genus: Tromerosaurus Species: Tromerosaurus solumons Morphological description Tromerosaurus solumons has a skull that combines features resembling those of both Gorgosaurus an

Reconstruction of Guanlong wucaii（Image source：TotalDino， CC BY 4.0 ） Age Jurassic（Oxfordian） 161.5-154.8 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Family: Proceratosauridae Genus: Guanlong Species: Guanlong wucaii Morphological description Guanlong wucaii was an early-diverging tyrannosauroid dinosaur. The holotype, IVPP V14531, had a total body length of approximately 3 m. It possessed sever

Reconstruction of Caudipteryx zoui（Image source：TotalDino， CC BY-SA 4.0 ） Age Cretaceous（Late Barremian） 125.6-124.6 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Clade: Oviraptorosauria Family: Caudipteridae Genus: Caudipteryx Species: Caudipteryx zoui Morphological description Caudipteryx zoui was a small, feather-covered theropod dinosaur. The holotype, NGMC 97-4-A, described in the original st

Reconstruction of Giganotosaurus carolinii（Image source：Durbed， CC BY-SA 3.0 ） Age Cretaceous（Albian-Cenomanian） 112-110 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Family: Carcharodontosauridae Genus: Giganotosaurus Species: Giganotosaurus carolinii Morphological description Giganotosaurus carolinii was an extremely large theropod dinosaur characterized by a proportionally low and elongate skul

Reconstruction of Carcharodontosaurus saharicus（Image source：Fred Wierum， CC BY-SA 4.0 ） Age Cretaceous（Cenomanian） 100.5-93.9 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Family: Carcharodontosauridae Genus: Carcharodontosaurus Species: Carcharodontosaurus saharicus Morphological description The anatomy of Carcharodontosaurus saharicus is currently based primarily on the Moroccan neotype, SGM-Di

Reconstruction of Anchiornis huxleyi (courtesy of HKU MOOC / Julius T. Csotonyi / Michael Pittman) Age Jurassic（Oxfordian） 160.89-160.25 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Family: Anchiornithidae Genus: Anchiornis Species: Anchiornis huxleyi Morphological description Anchiornis huxleyi was a small, fully feathered paravian theropod dinosaur. In lateral view, the skull is roughly triangu

Staurikosaurus pricei（Image source：JohnnyMingau， CC BY-SA 4.0 。） Age Late Triassic (Carnian) 233 Ma Taxonomy Kingdom：Animalia Phylum：Chordata Class：Reptilia Order：Saurischia Family：Herrerasauridae Genus：Staurikosaurus Species：Staurikosaurus pricei Morphological description Staurikosaurus pricei was a relatively small and agile carnivorous animal, estimated to have reached about 2.2 m in length and weighed approximately 12 kg. Its limbs were relatively long and slender. Skelet

Gnathovorax cabreirai（Image source：CaetaMS， CC BY-SA 4.0 。） Age Triassic (Carnian) 233 Ma Taxonomy Kingdom：Animalia Phylum：Chordata Class：Reptilia Order：Saurischia Family：Herrerasauridae Genus：Gnathovorax Species：Gnathovorax cabreirai Morphological description Gnathovorax cabreirai is estimated to have reached nearly 3 metres in length and weighed around 100 kilograms, although some estimates suggest a body mass closer to 60 kilograms. Skull of Gnathovorax cabreirai（Image sou

Life restoration of Chindesaurus bryansmalli（Image source：Jeff Martz，Public Domain） Age Triassic（Norian） 216 Ma Taxonomy Kingdom：Animalia Phylum：Chordata Class：Reptilia Order：Saurischia Genus：Chindesaurus Species：Chindesaurus bryansmalli Morphological description Chindesaurus bryansmalli was a relatively small dinosaur, although its exact size remains uncertain due to the fragmentary nature of the fossils. Its body length has been estimated at approximately 2–4 meters, with a

Life restoration（Image source：Ezequielvera， CC BY-SA 4.0 。） Age Triassic（Carnian） 230 Ma Taxonomy Kingdom：Animalia Phylum：Chordata Class：Reptilia Order：Saurischia Genus：Eodromaeus Species：Eodromaeus murphi Morphological description Eodromaeus murphi was a small dinosaur estimated to have reached approximately 1.2 metres in length and weighed between 4.5 and 7.1 kilograms. It possessed a lightly built body and relatively long hindlimbs, suggesting it was well adapted for runni

Reconstruction of Daemonosaurus chauliodus（Image source：FunkMonk， CC BY-SA 3.0 。） Age Triassic（Rhaetian） 203 Ma Taxonomy Kingdom：Animalia Phylum：Chordata Class：Reptilia Order：Saurischia Genus：Daemonosaurus Species：Daemonosaurus chauliodus Morphological description Daemonosaurus chauliodus was a small dinosaur, estimated to have reached only about 1.5 meters in length. Reconstructed Skull of Daemonosaurus chauliodus（Image source：Jaime A. Headden， CC BY 3.0 。） Its skull was lig

Tawa hallae life reconstruction（Image source：Jeffrey Martz，CC0 1.0 。） Age Triassic（Norian） 214 Ma Taxonomy Kingdom：Animalia Phylum：Chordata Class：Reptilia Order：Saurischia Genus：Tawa Species：Tawa hallae Morphological description Tawa hallae was a small early dinosaur with an adult body length of approximately 2.5 meters and a body mass of around 15 kilograms. Its skeletal anatomy displays characteristics linking it to several different dinosaur groups. For example, its skull

Restoration of Deinonychus antirrhopus（Image source：Fred Wierum， CC BY-SA 4.0 。） Age Cretaceous（Aptian to Albian） 115–108 Ma Taxonomy Kingdom：Animalia Phylum：Chordata Class：Reptilia Order：Saurischia Family：Dromaeosauridae Genus：Deinonychus Species：Deinonychus antirrhopus Morphological description Deinonychus antirrhopus was a medium-to-large-sized dromaeosaurid dinosaur. Its body length was approximately 3.5 meters, with an estimated weight of around 90 kilograms, though some

Allosaurus anax skeletal reconstruction（Image source：Chris Dodds ， CC BY-SA 2.0 ） Age Jurassic（Tithonian） 150 Ma Taxonomy Kingdom：Animalia Phylum：Chordata Class：Reptilia Order：Saurischia Family：Allosauridae Genus：Allosaurus Species：Allosaurus anax Morphological description Holotype specimen of Allosaurus anax（Image source：Danison, A et al.(2024). ， CC BY 4.0 ） Allosaurus anax was a gigantic species of allosaur that may have exceeded 10 meters in length and weighed approximate

Reconstruction of Eoraptor lunensis （Image source：Conty， CC BY-SA 3.0 ） Age Triassic（Carnian） 231-228 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Sauropodomorpha Genus: Eoraptor Species: Eoraptor lunensis Morphological description The skull of Eoraptor lunensis was relatively elongate in overall shape, with a slightly enlarged external naris and a broad antorbital fossa whose dorsolateral margin was st

Allosaurus fragilis （Image source：Fred Wierum， CC BY-SA 4.0 ） Age Jurassic（Tithonian） 150 Ma Taxonomy Kingdom：Animalia Phylum： Chordata Class：Reptilia Order：Saurischia Family：Allosauridae Genus： Allosaurus Species： Allosaurus fragilis Morphological description Allosaurus fragilis is a large theropod dinosaur characterized by relatively short forelimbs and long hindlimbs. However, compared to most later large theropods, its forelimbs are proportionally more developed. On av