Alectrosaurus (/əˌlɛktroʊˈsɔːrəs/; meaning "alone lizard") is a genus of tyrannosauroid theropod dinosaur that lived in Asia during the Late Cretaceous period, about some 96 million years ago in what is now the Iren Dabasu Formation.
It was a medium-sized, moderately-built, ground-dwelling, bipedal carnivore, estimated at 5 to 6 m (16 to 20 ft) with a body shape similar to its much larger advanced relative, Tyrannosaurus. Alectrosaurus was a very fast running tyrannosauroid as indicated by the elongated hindlimbs that likely filled the niche of a pursuit predator, a trait that seems to be lost by the advanced and robust tyrannosaurids, in adulthood.
that a species of Alectrosaurus would be found there. However, it is possible that these specimens may not be referable to Alectrosaurus, because of some...
distantly related to Tyrannosauridae than Eotyrannus and Appalachiosaurus. Alectrosaurus, a poorly known genus from Mongolia, is definitely a tyrannosauroid...
included all tyrannosauroids closer to Tyrannosaurus than to either Alectrosaurus, Aublysodon or Nanotyrannus. However, Nanotyrannus is often considered...
caenagnathid from Bayan Shireh. In addition, the potential discovery of Alectrosaurus in both formations seems to be another indicative of a correlation....
were added. List of dinosaur-bearing rock formations Gigantoraptor Alectrosaurus Ministry of Housing and Urban-Rural Development, ed. (2019). China Urban...
dinosaurian fauna of this formation includes the fast-running tyrannosauroid Alectrosaurus, the ornithomimosaur Archaeornithomimus, the therizinosaurids Erliansaurus...
carnosaurs. 1933 Charles Whitney Gilmore described the new genus and species Alectrosaurus olseni. 1946 Gilmore described the new species Gorgosaurus lancensis...
medium-sized theropods Erlikosaurus and Segnosaurus, Garudimimus, and possibly Alectrosaurus; the heavy-built ankylosaurs Talarurus and Tsagantegia; the small marginocephalians...
of Tyrannosauridae. However, Asian tyrannosaurs, like Alioramus and Alectrosaurus, were excluded, as was Eotyrannus from England. Earlier tyrannosaurs...
represent a juvenile Tyrannosaurus rex. Also in 1988, Paul renamed Alectrosaurus olseni (Gilmore 1933) into Albertosaurus olseni, but this has found...
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