#late jurassic

• Allosaur — A large bipedal carnivorous dinosaur from the order Saurischia (genus Allosaurus) that lived during the Late Jurassic period. This top structural predator was characterized by a massive skull equipped with serrated, sharp teeth, powerful hind limbs, and relatively short forelimbs provided with three sharp claws, being one of the most studied fossil reptiles.
• Allosaur — An alternative spelling form or Romanian phonetic variant for allosaur; a large bipedal carnivorous dinosaur from the order Saurischia (genus Allosaurus) that dominated terrestrial ecosystems during the Late Jurassic period. This predator was structurally characterized by a massive skull equipped with long, serrated teeth, muscular hind limbs, and forelimbs provided with curved, sharp claws.
• Aspidoceras — An extinct genus of ammonites (coiled marine cephalopod mollusks) in the family Aspidoceratidae, which lived during the Late Jurassic and Early Cretaceous periods. Fossils of this genus are recognized by their robust, evolute shell, characterized by distinctive rows of nodes or spines arranged on the flanks, used by paleontologists as index fossils for dating marine geological strata.