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TARBOSAURUS

a meat-eating tyrannosaurine theropod dinosaur from the Late Cretaceous of Asia.
tarbosaurus
Pronunciation: TAHR-bo-SOR-us
Meaning: Alarming lizard
Author/s: Maleev (1955)
Synonyms: See below
First Discovery: Ömnögovi, Mongolia
Chart Position: 158

Tarbosaurus bataar

Nine years after particularly fruitful expeditions by the Russian Acadamy of Sciences to Mongolia in 1946 and 1948-1949, Evgeny Maleev coined Tyrannosaurus bataar, Tarbosaurus efremovi, Gorgosaurus lancinator and Gorgosaurus novojilovi. In 1965, Rozhdestvensky recognized the entire haul as growth stages of the same species and rolled them all into one neat package; Tarbosaurus bataar. Then a relatively peaceful 27 years followed after which a long series of naming nonsense was heaped upon its almost Tyrannosaurus rex-sized shoulders.

Ken Carpenter moved all but Gorgosaurus novojilovi (which he renamed Maleevosaurus) back to Tyrannosaurus bataar in 1992, then George Olshevsky renamed Tyrannosaurus bataar into Jenghizkhan whilst plucking Tarbosaurus efremovi back from the brink of obscurity in 1995. In the meantime, Zhiming Dong had coined "Shanshanosaurus" for IVPP V4878 which Greg Paul assigned to Aublysodon in 1988, and Albertosaurus periculosis, Tyrannosaurus luanchuanensis, Tyrannosaurus turpanensis and Chingkankousaurus fragilis had all been named based on Mongolian teeth or bone fragment. Gosh darn it, they are all specimens of Tarbosaurus bataar which now, unsurprisingly, accounts for the highest percentage of all fossils collected from Mongolia's Nemegt Formation.

Compared to Tyrannosaurus rex, Tarbosaurus is somewhat smaller but has a few more teeth. Its head is similarly high but not as wide, and it probably lacked the binocular vision of T.rex as the rear of its skull hadn't expanded to allow for fully forward-pointing eyes. Its forelimbs were proportionately small, even by tyrant lizard standards, and each hand had two clawed fingers while some specimens also had a third, unclawed stump. Features of its jaws sets Tarbosaurus apart from all but one of its brethren—Alioramus—which has been accused of being a juvenile Tarbosaurus in the past. However, Alioramus is more slender with a higher tooth count still, and has a distinct row of crests running up its long and shallow snout.
Etymology
Tarbosaurus is derived from the Greek "tarbos" (alarm, dread, terror) and "sauros" (lizard). The species epithet, bataar, a mispelling of baatar, means "hero" in Mongolian.
Synonyms
Albertosaurus periculosus (Riabinin, 1930), Aublysodon huoyanshanensis (Dong, 1977), Chingkankousaurus fragilis (Young, 1958), Chinkankousaurus fragilis (Young, 1958—lapsus calami), Gorgosaurus lancinator (Maleev, 1955), Gorgosaurus novojilovi (Maleev, 1955), Jenghizkhan bataar (Olshevsky, 1995), Jenghizkhan luanchuanensis (Olshevsky, 1995), Maleevosaurus novojilovi (Maleev, 1955), Shanshanosaurus houyanshanensis (Dong, 1977), Tarbosaurus efremovi (Maleev, 1955), Tarbosaurus luanchuanensis (Dong, 1979), Tarbosaurus novojilovi (Maleev, 1955), Tyrannosaurus bataar (Maleev, 1955), Tyrannosaurus luanchuanensis (Dong, 1979), Tyrannosaurus luanchuensis (Dong, 1979—lapsus calami).
Discovery
The first fossils of Tarbosaurus were discovered in the Nemegt Formation, Ömnögovi, Mongolia, by a joint Soviet-Mongolian expedition to the Gobi Desert in 1946.
The holotype (PIN 555-1) consists of a partial skull and some vertebrae which Evgeny Maleev originally named Tyrannosaurus bataar in 1955.
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Cretaceous
Stage: Maastrichtian
Age range: 71-68 mya
Stats:
Est. max. length: 11 meters
Est. max. hip height: 4.2 meters
Est. max. weight: 5 tons
Diet: Carnivore
References
• Evgeny A. Maleev (1955) "Giant carnivorous dinosaurs of Mongolia".
• Evgeny A. Maleev "New carnivorous dinosaurs from the Upper Cretaceous of Mongolia".
• Philip J.Currie, Jørn H. Hurum & Karol Sabath (2003) "Skull structure and evolution in tyrannosaurid dinosaurs".
• Holtz, Thomas R. (2004) "Tyrannosauroidea" in Weishampel, Dodson and Osmólska (eds.) "The Dinosauria: Second Edition".
• Philip J. Currie and Zhiming Dong (2001) "New information on Shanshanosaurus huoyanshanensis, a juvenile tyrannosaurid from the Late Cretaceous of China".
• P.J. Currie (2001) "Theropods from the Cretaceous of Mongolia" in Benton, Shishkin, Unwin and Kurochkin (eds.) "The Age of Dinosaurs in Russia and Mongolia".
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To cite this page:
Atkinson, L. "TARBOSAURUS :: from DinoChecker's dinosaur archive".
›. Web access: 27th Jun 2017.
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