Allosaurus fragilis （image source：Fred Wierum，採用  CC BY-SA 4.0  授權） 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. O

Reconstruction of Ceratosaurus nasicornis （圖片來源：Oleg Kuznetsov，採用  CC BY-SA 4.0  授權） 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 projec

Reconstruction of Dilong paradoxus （圖片來源：Conty，採用  CC BY 3.0  授權） 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 body

Reconstruction of Ankylosaurus magniventris （圖片來源：DataBase Center for Life Science，採用  CC BY 4.0  授權） 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. It wa

Restoration of Lesothosaurus diagnosticus （圖片來源：paleoalberca，採用  CC BY-NC-SA 3.0  授權） 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 leng

Reconstruction of Brachiosaurus altithorax （圖片來源：Charles Nye，採用  CC BY-SA 4.0  授權） 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 25107)

Reconstruction of Caihong juji （圖片來源：Lucas-Attwell，採用  CC BY-SA 4.0  授權） 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 skeletal

Reconstruction of Chilantaisaurus tashuikouensis （圖片來源：FunkMonk，採用  CC BY-SA 3.0  授權。） 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 lo

Borealopelta markmitchelli （圖片來源：Nobu Tamura，採用  CC BY-SA 4.0  授權。） 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 in s

Life reconstruction of Sinosauropteryx prima preying on Dalinghosaurus （圖片來源：Robert Nicholls，採用  CC BY 4.0  授權。） 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. The

Reconstruction of Nigersaurus taqueti （圖片來源：Nobu Tamura，採用   CC BY 3.0  授權。） 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 taqueti ,

Life reconstruction of Wulong bohaiensis （圖片來源： Robert Nicholls ，採用  CC BY 2.0  授權。） 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 repres

Reconstruction of Diuqin lechiguanae （圖片來源：Ddinodan，採用  CC BY 4.0  授權） 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, the n