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ARSTANOSAURUS

a herbivorous hadrosaurid (duck-billed) dinosaur from the Late Cretaceous of Kazakhstan.
image
Pronunciation: ahr-STAHN-o-SOR-us
Meaning: Arstan lizard
Author/s: Suslov and Shilin (1982)
Synonyms: None known
First Discovery: Qyzylorda, Kazakhstan
Chart Position: 238

Arstanosaurus akkurganensis

Shilin and Suslov classified Arstanosaurus as a hadrosaurid in 1982, but by 1995 Nessov was convinced it was a neoceratopsian, due mainly to a similarly double-rooted tooth. Later still, Norman and Kurzanov announced that it had been incorrectly described in the first place; it didn't have double-rooted teeth at all, and the rest of its remains sadly lack diagnostic characters, making it a nomen dubium. Nevertheless, they tentatively assigned it to Lambeosaurinae based on the shape of its upper jaw, lamented a lack of features in common with any other Kazakh hadrosaurid (mainly because there are no like-for-like parts to compare), and pinpointed features in common with the Chinese Bactrosaurus.

A juvenile skeleton that was previously (and unofficially) tagged "Gadolosaurus" by Tsunemasa Saito whilst it toured Japan as part of a Soviet exhibition was recently sunk into Arstanosaurus by David Norman with no attempt to justify the move. It, and Arstanosaurus in its entirety, in fact, may belong to Batyrosaurus which was found in exactly the same area, though the only comparable bits are teeth... and they're different.

(Arstan lizard from Akkurgan)Etymology
Arstanosaurus is derived from "Arstan" (for the ancient Arstan Well, close to the fossil locality in Kazakhstan) and the Greek "sauros" (lizard).
The species epithet, akkurganensis, means "from Akkurgan" in Latin.
Discovery
The remains of Arstanosaurus were discovered at the Akkurgan locality of the Bostobinskaya Formation (aka Bostobe Svita), Qyzylorda, East of the Aral Sea in central Kazakhstan. The holotype (AAIZ 1/1) is a piece of upper jaw (maxilla), 13.5cm long. A piece of femur (thigh) and a previously unreported tooth were found in association.
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Cretaceous
Stage: Santonian-Campanian
Age range: 86-71 mya
Stats:
Est. max. length: ?
Est. max. hip height: ?
Est. max. weight: ?
Diet: Herbivore
References
• Shilin F.V. and Suslov Y.V. (1982) "A hadrosaur from the northeastern Aral Region".
• Norman D.B. and Kurzanov S.M. (1997) "On Asian ornithopods (Dinosauria: Ornithischia). 2. Arstanosaurus akkurganensis Shilin and Suslov, 1982".
• Nesov L.A. (1995) "Dinozavri severnoi Yevrasii: Novye dannye o sostave kompleksov, ekologii i paleobiogeografii" [Dinosaurs of Northern Eurasia: new data about assemblages, ecology and paleobiogeography].
• Horner J.R, Weishampel D.B. and Forster C.A. (2004) "Hadrosauridae" in Weishampel, Dodson and Osmólska (eds.) "The Dinosauria: Second Edition".
• Norman D.B. and Sues H.-D. (2000) "Ornithopods from Kazakhstan, Mongolia and Siberia" in Benton, Shishkin, Unwin and Kurochkin (eds.) "The Age of Dinosaurs in Russia and Mongolia". /uk.
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To cite this page:
Atkinson, L. "ARSTANOSAURUS :: from DinoChecker's dinosaur archive".
›. Web access: 22nd Sep 2017.
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