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

Reconstruction of Ceratosaurus nasicornis （Image source：Oleg Kuznetsov， CC BY-SA 4.0 ） Age Jurassic（Oxfordian-Tithonian） 161.2-145 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Family: Ceratosauridae Genus: Ceratosaurus Species: Ceratosaurus nasicornis Morphological description Ceratosaurus nasicornis was a relatively slender ceratosaurian theropod characterized most prominently by horn-like pr

Reconstruction of Dilong paradoxus （Image source：Conty， CC BY 3.0 ） Age Cretaceous（Valanginian-Barremian） 139-128 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Clade: Coelurosauria Superfamily: Tyrannosauroidea Clade: Pantyrannosauria Genus: Dilong Species: Dilong paradoxus Morphological description Dilong paradoxus was a small, slender basal tyrannosauroid theropod. Known specimens indicate a

Reconstruction of Ankylosaurus magniventris （Image source：DataBase Center for Life Science， CC BY 4.0 ） Age Cretaceous（Maastrichtian） 68-66 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Ornithischia Family: Ankylosauridae Subfamily: Ankylosaurinae Genus: Ankylosaurus Species: Ankylosaurus magniventris Morphological description Ankylosaurus magniventris was a heavily built, low-slung, and broad-bodied ankylosaurid dinosaur. I

Restoration of Lesothosaurus diagnosticus （Image source：paleoalberca， CC BY-NC-SA 3.0 ） Age Jurassic（Hettangian-Sinemurian） 201- 190 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Ornithischia Clade: Genasauria Genus: Lesothosaurus Species: Lesothosaurus diagnosticus Morphological description Lesothosaurus diagnosticus was a small to medium-sized early ornithischian dinosaur. Known specimens range from nearly 1 metre in body

Reconstruction of Brachiosaurus altithorax （Image source：Charles Nye， CC BY-SA 4.0 ） Age Jurassic（Kimmeridgian-Tithonian） 154-150 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Clade: Dinosauria Order: Saurischia Suborder: Sauropodomorpha Family: Brachiosauridae Genus: Brachiosaurus Species: Brachiosaurus altithorax Morphological description Brachiosaurus altithorax was an enormous brachiosaurid sauropod dinosaur. Although its holotype specimen (FMNH P 25

Reconstruction of Caihong juji （Image source：Lucas-Attwell， CC BY-SA 4.0 ） Age Jurassic（Oxfordian） 161.5-154.8 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Clade: Paraves Infraorder: Deinonychosauria Genus: Caihong Species: Caihong juji Morphological description Caihong juji is a paravian theropod dinosaur. Its holotype (PMoL-B00175) represents an adult individual, with an estimated total skel

Reconstruction of Chilantaisaurus tashuikouensis （Image source：FunkMonk， CC BY-SA 3.0 ） Age Cretaceous（Turonian） 92 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Order: Saurischia Genus: Chilantaisaurus Species: Chilantaisaurus tashuikouensis Morphological description Chilantaisaurus tashuikouensis was a large theropod, reaching approximately 11 meters in length and an estimated body mass of around 6 metric tons. The forelimbs were notably robust, with a

Borealopelta markmitchelli （Image source：Nobu Tamura， CC BY-SA 4.0 ） Age Cretaceous（Albian） 112 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Order: Ornithischia Family: Nodosauridae Genus: Borealopelta Species: Borealopelta markmitchelli Morphological description Borealopelta markmitchelli reached a body length of up to 5.5 meters and a body mass exceeding 1.3 tonnes. Its dorsal and lateral surfaces were covered with rows of dermal osteoderms arranged i

Life reconstruction of Sinosauropteryx prima preying on Dalinghosaurus （Image source：Robert Nicholls， CC BY 4.0 ） Age Cretaceous（Aptian） 122 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Order: Saurischia Family: Sinosauropterygidae Genus: Sinosauropteryx Species: Sinosauropteryx prima Morphological description Sinosauropteryx prima was a small-bodied theropod, with the holotype measuring only 68 cm in total length, representing a juvenile individual. T

Reconstruction of Nigersaurus taqueti （Image source：Nobu Tamura， CC BY 3.0 ） Age Cretaceous（Aptian-Albian） 115-105 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Order: Saurischia Family: Rebbachisauridae Genus: Nigersaurus Species: Nigersaurus taqueti Morphological description In the Elrhaz Formation of Niger, within the Sahara Desert, paleontologists discovered the fossil of an exceptionally lightweight sauropod dinosaur. This animal, Nigersaurus taquet

Life reconstruction of Wulong bohaiensis （Image source： Robert Nicholls ， CC BY 2.0 ） Age Cretaceous（Aptian） 120.3 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Order: Saurischia Family: Dromaeosauridae Genus: Wulong Species: Wulong bohaiensis Morphological description Wulong bohaiensis is a small dromaeosaurid, with a body length of approximately 1 meter. Its tail is exceptionally long, reaching about twice the length of the body. The known specimen rep

Reconstruction of Diuqin lechiguanae （Image source：Ddinodan， CC BY 4.0 ） Age Cretaceous（Santonian） 86.3-83.6 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Family: Unenlagiidae Genus: Diuqin Species: Diuqin lechiguanae Morphological description Diuqin lechiguanae is represented by a fragmentary yet clearly associated postcranial skeleton, including the neural arch of the last sacral vertebra, t