Adamantisaurus — a fragmentary titanosaur from the Late Cretaceous of Brazil Adamantisaurus Adamantisaurus is a little-known titanosaurian sauropod known only from a handful of tail vertebrae from the Adamantina Formation; it highlights challenges in classifying fragmenta…
Aegyptosaurus — African titanosaurian sauropod Aegyptosaurus Aegyptosaurus, a titanosaurian sauropod from the Upper Cretaceous of northern Africa, is known from early 20th‑century discoveries (many since lost) and is important for understand…
Agathaumas — a dubious ceratopsid genus from the Late Cretaceous Agathaumas Agathaumas, meaning "great wonder", is a fragmentary and debated ceratopsid dinosaur genus from Late Cretaceous Wyoming. Known from limited remains, it has historically been linked…
Alamosaurus (Late Cretaceous titanosaur) Alamosaurus Alamosaurus, a giant titanosaur from the Late Cretaceous American Southwest, is known from fragmentary skeletons and is pivotal for interpreting regional faunal and environmental c…
Alectrosaurus — a Late Cretaceous tyrannosauroid from Asia Alectrosaurus Alectrosaurus was a lightly built, fast-running tyrannosauroid dinosaur from Late Cretaceous Mongolia and China. Known from partial remains, its exact relationships and lifestyle r…
Alvarezsaurus: a small Late Cretaceous theropod from Argentina Alvarezsaurus Alvarezsaurus is a small bipedal theropod from Upper Cretaceous Argentina (≈86–83 Ma). A basal alvarezsaur with cursorial hindlimbs, it helps document the transition to the short-a…
Bicentenaria: a small coelurosaurian theropod from Late Cretaceous Argentina Bicentenaria Bicentenaria is a genus of small carnivorous coelurosaurian theropods from Argentina, known from early Late Cretaceous (~90 Ma) deposits. The type species is Bicentenaria argentina…
Edmontosaurus — Late Cretaceous duck‑billed hadrosaur Edmontosaurus Edmontosaurus is a well‑known North American hadrosaur from the latest Cretaceous, noted for its broad toothless beak, massive dental batteries, frequent fossils and rare mummified…
