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Describer
Lambe, 1914
Time
Cretaceous Late Campanian
Maastrichtian
Classification
Saurischia Theropoda Tyrannosauria Tyrannosauridae Tyrannosaurinae Albertosaurini
Diet
Carnivore
Fossilsite
Judith River Group (Wedge), Alberta, Canada; Judith River Formation, (Wedge) Montana Fruitland Formation, Kirtland Formation, New Mexico, US
Fall Under
Gorgosaurus
Length
8 meter
Info Typespecies - Skin
Gorgosaurus > Gorgosaurus libratus (Lambe, 1914) >> Albertosaurus libratus (Lambe, 1914)
Gorgosaurus > Gorgosaurus sternbergi (Matthew &
Brown, 1923) >> Albertosaurus sternbergi (Matthew &
Brown, 1923)
USNM 12814 "Free dragon lizard". In the 1970s, a major study of the family Tyrannosauridae concluded that
Gorgosaurus and
Albertosaurus
were the same genus, and that the only differences between the two were
suggested not only by comparisons of dissimilar growth stages, but also
by variations between populations.
Albertosaurus was
named first, so according to the rules of biological nomonclature, its
name had priority. However, recent work by Phillip Currie at the Royal
Tyrrell Museum of Paleontology has shown that these two dinosaurs are,
in fact, separate and valid genera.
The
promaxillary fenestra was close to the maxillary fenestra, the
maxillary fenestra is oval and separaed from the antorbital fenestra by
a wide bar of the maxilla. The acromial process of the scapula is very
deep, and the tibia is relatively robust (Carpenter, 1992).
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