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AMTOSAURUS

a dubious ornithischian dinosaur from the Late Cretaceous of Mongolia.
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Pronunciation: AHM-to-SOR-us
Meaning: Amtgai lizard
Author/s: Kurzanov and Tumanova (1978)
Synonyms: None known
First Discovery: Ömnögovi, Mongolia
Chart Position: 207

Amtosaurus magnus

Known only from part of a braincase from southerm Mongolia, Amtosaurus was initially thought to be an ankylosaurid, then a duck-billed hadrosaurid, though Jolyon Parish and Paul Barrett reckon its remains are too scant to classify as anything more than an indeterminate ornithischian. Funnily enough, better fossils from Uzbekistan were assigned here as a second species—Amtosaurus archibaldi—and they turned out to be the property of a valid ankylosaur. Unfortunately, it wasn't Amtosaurus, as Parish and Barrett renamed it Bissektipelta in 2004.
(Great Amtgai Lizard) Etymology
Amtosaurus is derived from "Amtgai" (the site where it was discovered), and the Greek "sauros" (lizard). The species epithet, magnus, means "Great" in Latin.
Discovery
The remains of Amtosaurus were discovered at the Amtgay locality ("Amtgai Khuduk") in the Bayanshiree Formation, Ömnögovi Province, Mongolia.
The holotype (PIN 3780/2) is a partial braincase.
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Cretaceous
Stage: Cenomanian-Turonian
Age range: 99-89 mya
Stats:
Est. max. length: ?
Est. max. hip height: ?
Est. max. weight: ?
Diet: Herbivore
Family Tree:
Dinosauria
Ornithischia
Amtosaurus
magnus
References
• Kurzanov SM and Tumanova TA (1978) "On the structure on the endocranium in some ankylosaurs from Mongolia". Paleontol. Zh. 1978:90-96.
• Tumanova TA (1987) "The Armored Dinosaurs of Mongolia". The Joint Soviet-Mongolian Paleontological Expedition Transactions, vol. 32, 76p.
• Carpenter K (2001) "The Armored Dinosaurs". Indiana University Press; First Edition (9 Nov. 2001).
• Parish J and Barrett P (2004) "A reappraisal of the ornithischian dinosaur Amtosaurus magnus Kurzanov & Tumanova 1978, with comments on the status of A. archibaldi Averianov 2002". Canadian Journal of Earth Sciences 41: 299-306.
• Arbour VM and Currie PJ (2015) "Systematics, phylogeny and palaeobiogeography of the ankylosaurid dinosaurs". Journal of Systematic Palaeontology, doi: 10.1080/14772019.2015.1059985.
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To cite this page:
Atkinson, L. "AMTOSAURUS :: from DinoChecker's dinosaur archive".
›. Web access: 27th Apr 2017.
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