Science ❯ Biology ❯ Evolution

Species Classification

Common Names Tyrannosaurus rex Species Complex Tyrannosaurids Tyrannosaurus rex Theropods Saurópodos Taxonomy Genus Tylosaurus Cariamiformes Fossil Evidence Extinct Species Tyrannosauroids Mesocyon coryphaeus Giraffe Subspecies Hummingbirds Plesionectes longicollum Corvidae Mosasaur Tyrannosaur Diversity Centrosaurinae Ornithischians Ca. Electrothrix yaqonensis Tyrannosaurus rex Complex T.rex and relatives Terrestrisuchus Scorpions Tyrannosaur Evolution Bird Species Dinosauria Tylosaurus rex Tylosaurus Rex Homo Genus Nanotyrannus lethaeus Bird Evolution Morphological Adaptations Felidae Evolution Plesiosauria Ornithischian Dinosaurs Megaraptors Carcharodontosaurus Xenoparity Nautiloids Darwinopterans

Scientists Name Giant Texas Mosasaur Tylosaurus Rex

The naming compels museum reclassification of long‑held fossils.

Tiny Spanish Dinosaur Foskeia Pelendonum Formally Described, Recasting Parts of the Ornithischian Family Tree

Study Finds T. Rex Reached Full Size at 35–40, Reshaping Its Life History

New Study Finds T. Rex Reached Full Size Around Age 40

Hyoid-Bone Study Confirms Nanotyrannus Was Its Own Tyrannosaur Species

Adult Nanotyrannus Identified in 'Dueling Dinosaurs' Fossil, Forcing Rethink of T. Rex Growth

Nature Study Confirms Adult Nanotyrannus in 'Dueling Dinosaurs,' Upending T. rex Growth Models

Iberian Harvester Ant Queens Clone Another Species to Produce Workers

New Tarantula Genus Satyrex Unveiled With Record-Long Male Palps