Dinosaur Dictionary (A-Z)

Aardonyx is a genus of basal sauropodomorph dinosaurs that lived during the Early Jurassic period in South Africa. The name Aardonyx is derived from the Afrikaans word “aard,” … Read more

The Abelisaurus, meaning “Abel’s lizard,” stands as a fascinating carnivorous dinosaur that roamed South America’s ancient landscapes. It lived during the Late Cretaceous period, estimated to be around … Read more

Abrictosaurus is a fascinating dinosaur from the Early Jurassic period that captures the imagination of many. This small, nimble herbivore measured about 4 to 6 feet in length … Read more

Abrosaurus is a fascinating dinosaur that roamed the Earth during the Middle Jurassic Period. This gentle giant was a herbivore, well-adapted to feeding on low-lying plants with its … Read more

Abydosaurus is a fascinating sauropod dinosaur from the Early Cretaceous period, discovered in Utah. This dinosaur is notable for its unique features, including its narrower teeth, which set … Read more

Acanthopholis was a unique dinosaur that roamed the earth during the Early Cretaceous period. Known for its heavy armor and distinctive spikes along its spine, this herbivorous creature … Read more

Achelousaurus is a genus of centrosaurine ceratopsid dinosaur that lived during the Late Cretaceous Period of what is now North America, about 74.2 million years ago. The first … Read more

Acheroraptor is an extinct genus of dromaeosaurid theropod dinosaur that lived during the Late Cretaceous period in Montana, North Dakota, and South Dakota, USA. It contains a single … Read more

Achillesaurus is a fascinating dinosaur from the Late Cretaceous period, discovered in present-day Argentina. This carnivorous dinosaur lived approximately 86.3 to 83.6 million years ago and inhabited a … Read more

Achillobator is a genus of large dromaeosaurid theropod dinosaur that lived during the Late Cretaceous period about 96 million to 89 million years ago in what is now … Read more

Acristavus is a fascinating dinosaur that lived during the Late Cretaceous period in North America. This small, bird-like dinosaur is known for its unique feature: it lacked any … Read more

Acrocanthosaurus, a genus of large theropod dinosaur, roamed North America approximately 115 to 105 million years ago during the early Cretaceous period. Known for its distinctive high spinal … Read more

Acrotholus is a fascinating dinosaur that lived during the late Cretaceous period, about 85 million years ago, in what is now Canada. This small, bone-headed dinosaur is notable … Read more

Adamantisaurus was a fascinating dinosaur that roamed South America during the Late Cretaceous period. This titanosaur likely measured around 13 to 18 meters long and had a bulky … Read more

Adasaurus is a genus of dromaeosaurid dinosaur that lived in Asia during the Late Cretaceous period about 70 million years ago. The genus is known from two partial … Read more

Adelolophus is a genus of lambeosaurine dinosaur that lived during the Upper Cretaceous period in what is now the United States. The type specimen of Adelolophus is A. … Read more

Adeopapposaurus was an interesting dinosaur that lived during the Early Jurassic period, thriving in what is now Argentina. This dinosaur, known for its long neck, reached lengths of … Read more

Adynomosaurus is a unique dinosaur that lived during the Late Cretaceous period in what is now Spain. This dinosaur is known for its distinctively small shoulder blade, which … Read more

Aegyptosaurus is a genus of sauropod dinosaur that lived in Africa during the Late Cretaceous Period, around 95 million years ago. The name Aegyptosaurus is derived from the … Read more

Aeolosaurus was a fascinating dinosaur that roamed South America during the Late Cretaceous period. This massive herbivore is known for its long neck and tail, making it one … Read more

Aepisaurus was a remarkable herbivorous dinosaur that lived during the Lower Cretaceous period, around 100 million years ago. This giant could grow up to 20 meters long and … Read more

Aepyornithomimus was a fascinating dinosaur that lived during the late Cretaceous period in what is now Asia. This medium-sized dinosaur belongs to the ornithomimosaur family, known for their … Read more

Aerodactylus is a fascinating prehistoric creature that belonged to a group known as pterosaurs. This small, songbird-sized pterosaur lived during the Late Jurassic period in what is now … Read more

Aerosteon was a fascinating dinosaur from the Late Cretaceous period, known for its impressive size and unique characteristics. This predator could grow up to 10 meters (33 feet) … Read more

Aerotitan was a fascinating flying reptile that lived during the Late Cretaceous period. This pterosaur, known for its impressive wingspan of at least 5 meters, roamed the skies … Read more

Aetodactylus is a fascinating pterosaur that lived during the Late Cretaceous period, around 99.6 to 93.5 million years ago. This unique flying reptile was discovered from a single … Read more

Aetonyx is a fascinating dinosaur that lived during the Early Jurassic period, roughly 198 million years ago. This medium-sized dinosaur measured about 13 to 20 feet long and … Read more

Afrovenator is a genus of theropod dinosaur that lived during the Middle to Late Jurassic Period in what is now Niger, Africa. Its name means “African hunter” and … Read more

Agathaumas is an intriguing dinosaur that lived during the Late Cretaceous period, around 66 million years ago. This massive ceratopsid dinosaur is estimated to have measured up to … Read more

Agilisaurus is a genus of small herbivorous dinosaur that lived during the Middle Jurassic Period in what is now eastern Asia. The name Agilisaurus derives from the Latin … Read more

Agnosphitys is an intriguing creature from the Late Triassic period that has both puzzled and fascinated paleontologists. This dinosauriform, specifically known as A. cromhallensis, offers a glimpse into … Read more

Agrosaurus is an intriguing dinosaur that captures the imagination of paleontology enthusiasts. This dinosaur, known for its significant fossil finds, offers insights into the earliest days of dinosaur … Read more

Agujaceratops is a fascinating dinosaur that roamed what is now Texas during the Late Cretaceous period. This large, horned dinosaur measured about 14 feet in length and weighed … Read more

Agustinia was a unique sauropod dinosaur that roamed South America during the Early Cretaceous period. This dinosaur is notable for its distinctive bony structures called osteoderms, which likely … Read more

Ahshislepelta is a fascinating dinosaur that lived during the Late Cretaceous period in what is now New Mexico. This unique ankylosaur is known for its herbivorous diet and … Read more

Airakoraptor is a fascinating dinosaur that lived during the Cretaceous period in what is now Mongolia. With its unique features, Airakoraptor offers a glimpse into the lifestyles of … Read more

Ajancingenia is a fascinating dinosaur from the Late Cretaceous period that captured researchers’ attention. This theropod dinosaur was an omnivore, thriving in the diverse ecosystems of ancient Asia. … Read more

Ajkaceratops is a fascinating dinosaur that lived during the Late Cretaceous period in what is now Europe. This small herbivore, notable for its beaked mouth, offers unique insights … Read more

Akainacephalus is a fascinating dinosaur that roamed what is now southern Utah during the Late Cretaceous period. This plant-eating dinosaur measured between 13 to 16 feet long and … Read more

Alamosaurus, a fascinating member of the Titanosauria group, was a colossal dinosaur reaching impressive sizes. It is notable for its long neck and tail, which it used to … Read more

Alanqa was a unique flying reptile from the Late Cretaceous period, known for its intriguing characteristics. This pterosaur, classified in the Azhdarchidae family, is believed to have lived … Read more

Alaskacephale is a fascinating dinosaur that roamed the Earth during the Late Cretaceous period, around 80 million years ago. This unique creature is noted for its distinctive dome-shaped … Read more

Albalophosaurus is a fascinating dinosaur that roamed the Earth during the Early Cretaceous Period. This small, bipedal herbivore measured about 1.5 meters in length and weighed between 20 … Read more

Albertaceratops was a genus of herbivorous ceratopsian dinosaur that lived during the Late Cretaceous period, about 80 to 75 million years ago. It was discovered in Alberta, Canada, … Read more

Albertadromeus is a fascinating dinosaur that lived during the Late Cretaceous period in what is now Alberta, Canada. This small, speedy herbivore is known for its unique adaptations … Read more

Albertonectes was a fascinating marine reptile that roamed the seas during the Late Cretaceous period. This elasmosaurid plesiosaur is known for its remarkably long neck, which helped it … Read more

Albertonykus is a fascinating small dinosaur that lived during the Late Cretaceous period in what is now Alberta, Canada. This tiny theropod measured around 1.1 meters long and … Read more

The Albertosaurus, a name meaning “Alberta lizard,” was a remarkable genus of tyrannosaurid theropod dinosaurs that roamed the Earth during the late Cretaceous period. A close relative of … Read more

Albinykus is a fascinating dinosaur known for its small size and unique features. This dinosaur was one of the smallest non-avian dinosaurs, weighing less than 2 pounds. Living … Read more

Alcovasaurus is a fascinating dinosaur that captured the interest of paleontologists and dinosaur enthusiasts alike. This large stegosaur measured about 6.5 meters in length and had a unique … Read more

Alectrosaurus is a genus of theropod dinosaur that lived in Asia during the Late Cretaceous period, approximately 96 million years ago. It was a medium-sized, bipedal carnivore that … Read more

Aletopelta was a unique dinosaur that roamed the Earth during the Late Cretaceous period. This herbivorous dinosaur measured about 2.4 meters (7.9 feet) long and is known for … Read more

Alexeyisaurus is an intriguing prehistoric creature that lived during the Late Triassic period. This extinct genus is believed to be one of the earliest known plesiosaurs, a group … Read more

Algoasaurus is a fascinating dinosaur that lived during the Early Cretaceous period, around 140 million years ago. This sauropod, known for its unique features and size, ranged from … Read more

Alioramus is a genus of theropod dinosaurs that lived during the Late Cretaceous period, approximately 70 million years ago. It was first discovered in the Nemegt Formation of … Read more

The Allosaurus was a giant carnivorous dinosaur that roamed the Earth during the late Jurassic period, about 155 to 150 million years ago. Known for its large skull, … Read more

Alnashetri is a fascinating dinosaur that lived during the late Jurassic period. This small carnivorous dinosaur was known for its unique features, such as a long neck and … Read more

Alocodon is an intriguing genus of ornithischian dinosaurs that lived during the Jurassic period, primarily known from its fossilized teeth. Its fossils have been discovered in regions like … Read more

Alpkarakush is an intriguing dinosaur that roamed the Earth during the Middle Jurassic period. This large theropod showcases unique features like a high, arched skull and prominent eyebrow … Read more

Altirhinus is a fascinating dinosaur that lived during the Early Cretaceous period, roughly 110 to 100 million years ago. This large herbivore reached lengths of up to 26 … Read more

Altispinax is an intriguing dinosaur that roamed the Earth during the Early Cretaceous period, about 140 to 133 million years ago. This large predatory theropod was known for … Read more

Alvarezsaurs were a distinctive group of small theropods that roamed the earth during the Late Cretaceous period, about 86 to 83 million years ago. Known for their slender, … Read more

Alvarezsaurus was a small dinosaur that roamed what is now Argentina during the Late Cretaceous period. This unique creature measured about 1 to 1.4 meters in length and … Read more

Alwalkeria is a fascinating dinosaur that lived during the Late Triassic period, around 228 to 200 million years ago. This small, bipedal dinosaur was notable for its slender … Read more

Alxasaurus was a fascinating dinosaur from the Early Cretaceous period, discovered in the Alxa Desert of Inner Mongolia. This unique creature, known for its long neck and large … Read more

The Amargasaurus, notable for the distinctive spines lining its neck and back, roamed the woodlands of South America during the Early Cretaceous period. This fascinating dinosaur was relatively … Read more

Amargatitanis, a fascinating dinosaur from the Early Cretaceous, offers a glimpse into a unique prehistoric world. This giant sauropod was known for its impressive size, measuring between 32 … Read more

Amazonsaurus is a fascinating sauropod dinosaur that roamed South America during the Early Cretaceous Period. This dinosaur could grow up to 12 meters (40 feet) long and weighed … Read more

Ammosaurus is a genus of extinct herbivorous dinosaur that lived during the Early Jurassic period, approximately 195-180 million years ago. The fossils of Ammosaurus were discovered in the … Read more

Ampelosaurus is a titanosaurian sauropod dinosaur that lived during the Late Cretaceous Period in what is now France. Its remains were first discovered in 1989 in a bonebed … Read more

Amphicoelias, a fascinating genus of herbivorous sauropod dinosaur, roamed the Earth approximately 150 million years ago during the Tithonian stage of the Late Jurassic Period. Fossils of this … Read more

Amtocephale is a fascinating dinosaur that lived during the Late Cretaceous period, primarily in what is now Mongolia. This unique creature is known for its thick, dome-shaped skull, … Read more

Amtosaurus was a unique dinosaur that roamed the Earth during the Late Cretaceous period. This herbivore, known for its fascinating features, was discovered in Mongolia’s Bayan Shireh Formation. … Read more

Amurosaurus was a fascinating dinosaur from the late Cretaceous period. This herbivorous creature reached impressive lengths of about 26 feet and had unique features like a duck-billed snout … Read more

Amygdalodon is a genus of basal sauropod that lived in the Middle Jurassic period of Argentina, about 180-172 million years ago. Its name, which means “almond tooth,” refers … Read more

Anabisetia is a fascinating dinosaur that lived during the Late Cretaceous period in Patagonia, Argentina. This small, bipedal herbivore measured nearly seven feet long and is known for … Read more

Anasazisaurus is a fascinating dinosaur that roamed the Earth about 74 million years ago during the Late Cretaceous period. This hadrosaurid, known as the “Anasazi lizard,” was a … Read more

Anatotitan was a fascinating dinosaur from the Late Cretaceous period, known for its unique features and size. This plant-eating giant could grow up to 15 meters long and … Read more

Anchiceratops is an extinct genus of ceratopsian dinosaur that lived during the Late Cretaceous period, approximately 74-70 million years ago. It was a medium-sized, heavily built, quadrupedal herbivore … Read more

Anchiornis huxleyi was a small paravian dinosaur, a group that includes birds and their closest non-avian dinosaur relatives. With its discovery in the Tiaojishan Formation of China, it … Read more

Anchisaurus is a genus of dinosaur that lived during the Early Jurassic period, approximately 200 to 195 million years ago. It was a basal sauropodomorph dinosaur, meaning it … Read more

Andesaurus was a fascinating dinosaur that roamed South America during the Late Cretaceous period. This dinosaur, which belonged to the titanosaur family, measured between 15 to 18 meters … Read more

Angaturama was a fascinating dinosaur that roamed South America during the Early Cretaceous period. It was a carnivorous theropod that grew up to 30 feet long, showcasing a … Read more

Angloposeidon is an intriguing dinosaur that roamed the Earth during the Early Cretaceous period. This large sauropod was notable for its impressive size and herbivorous diet, primarily living … Read more

Angolatitan is an exciting dinosaur that roamed what is now Angola during the Upper Cretaceous period. This fascinating creature is notable for being the first non-avian dinosaur discovered … Read more

Angulomastacator is a fascinating duck-billed dinosaur that roamed North America during the Late Cretaceous period. This herbivore was known for its distinctive bent jaw, which helped it adapt … Read more

Angustinaripterus was a unique flying reptile that lived during the Jurassic period. This fascinating pterosaur measured about 1.5 meters in length and had a long skull, giving it … Read more

Anhanguera was a unique pterosaur that roamed the skies millions of years ago. This fascinating creature was about 4.6 meters (15 feet) long and primarily fed on fish. … Read more

Aniksosaurus is a lesser-known dinosaur that once roamed what is now Argentina during the Late Cretaceous period. This small predator stood out for its unique features and ecological … Read more

Animantarx was a fascinating dinosaur that roamed North America during the Cretaceous period. This medium-sized, armored herbivore measured about 10 feet long and was covered in bony plates … Read more

The Ankylosaurus, with its distinctive armor and club-like tail, is a fascinating subject within the world of dinosaurs. It roamed North America approximately 70 million to 66 million … Read more

Anningasaura was a fascinating marine reptile that swam the oceans during the Early Jurassic period. This plesiosaur, known for its unique features, was relatively small compared to other … Read more

Anodontosaurus was a unique dinosaur that roamed Canada during the Late Cretaceous period. This herbivorous ankylosaur is known for its distinctive features, including a wide, pointed tail club … Read more

Anoplosaurus was a fascinating dinosaur that roamed the Earth during the Cretaceous period. This herbivorous dinosaur was unarmored, which sets it apart from many of its contemporaries who … Read more

Anserimimus is a genus of ornithomimid theropod dinosaur that lived in the Late Cretaceous Period, approximately 84-66 million years ago. Its name means “goose mimic,” which refers to … Read more

Antarctopelta is a fascinating dinosaur that roamed the icy landscapes of Antarctica during the Late Cretaceous period. This unique creature was the first dinosaur discovered on the continent, … Read more

Antarctosaurus is a genus of titanosaurian sauropod dinosaur that lived in South America during the Late Cretaceous Period. The name Antarctosaurus means “southern lizard,” and it was one … Read more

Antetonitrus is an intriguing dinosaur that offers a glimpse into the early days of sauropod evolution. This dinosaur, known for its long neck and herbivorous diet, lived during … Read more

Antrodemus was a fascinating theropod dinosaur that roamed the Earth during the Late Jurassic Period. This dinosaur was known for its sizeable body, which could weigh around 2,090 … Read more

Anurognathus is a fascinating genus of small pterosaur that lived during the Late Jurassic period, about 150 million years ago. This tiny creature is recognized for its unique … Read more