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ANSERIMIMUS

an ornithomimid (bird mimic) dinosaur from the Late Cretaceous of Mongolia.
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Pronunciation: AN-ser-i-MIEM-us
Meaning: Goose mimic
Author/s: Barsbold (1988)
Synonyms: None known
First Discovery: Ömnögovi, Mongolia
Chart Position: 266

Anserimimus planinychus

Anserimimus is a lanky ornithomimosaur from the Bugin Tsav Locality in the Nemegt Formation of Mongolia's Gobi Desert and is famous for its flattened unguals, which isn't as painful as it sounds. Unguals are the last joint(s) of the fingers or toes, typically adorned with a keratin claw, nail, or even a hoof, and there's no limit to how many or few you can have, as long as it's more than none.

In Anserimimus, the flattened unguals (straight claws) are on its hands and are elongate, non-curved, and wide. And when coupled with its closely bound metacarpals (the bones that attach the fingers to the wrist) it was in possession of what can best be described as a pair of shovels. What an ornithomimosaur ("bird-mimic") was doing with such manus (hands) on the ends of so uniquely long and powerful arms is anyone's guess, and some have guessed "burrowing." But whatever it was doing its relatives were doing something very different.

Barsbold's ornithomimosaurs are all named after real birds, but we often wondered whether his Struthiomimus (ostrich mimic), Gallimimus (rooster mimic), and Anserimimus (goose mimic) actually resembled their namesakes or if they were coined out of convenience or infatuation. Our question was answered, kind of, in 2010 when Phil Currie suggested that Anserimimus may be synonymous with Gallimimus, and geese look nothing like roosters.

Barring the parts that Barsbold described in 1988 with features that set it apart from other ornithomimids, little information has been released regarding the anatomy of Anserimimus, and the closest it has come to a full description arrived via the thesis of Robert Bronowicz in 2005. As well as describing the holotype, he also referred additional material to Anserimimus, including a second partial skeleton (ZPAL MgD-I/65) from the Tsagan Khushu locality, near Bugin Tsav. However, in 2010 Bronowicz had a change of heart, and decided that the latter probably represented a separate species, based on the presence of features found in both Asia's Anserimimus and North America's Ornithomimus.
Etymology
Anserimimus is derived from the Latin "anser" (goose) and the Greek "mimos" (mimic). The species epithet, planinychus, means "flat clawed".
Discovery
Discovered at Bugin Tsav in the Nemegt Formation, Ömnögovi Aimag (Province), Mongolia, the Goose mimic holotype (IGM 100/300) is a partial skeleton minus the skull.
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Cretaceous
Stage: Maastrichtian
Age range: 71-68 mya
Stats:
Est. max. length: 3 meters
Est. max. hip height: ?
Est. max. weight: 50 Kg
Diet: Omnivore
References
• Barsbold R (1988) "A new Late Cretaceous ornithomimid from the Mongolian People's Republic". Paleontological Journal 1988(1):122-125
• Paul GS (2010 "The Princeton Field Guide to Dinosaurs".
• Bronowicz R (2005) "Upper Cretaceous dinosaur Anserimimus planinychus (Theropoda: Ornithomimidae) from Mongolia". MS Thesis, University of Warsaw.
• Bronowicz R (2011) "New Material of a Derived Ornithomimosaur from the Upper Cretaceous Nemegt Formation of Mongolia". Acta Palaeontologica Polonica 56 (3): 477.doi:10.4202/app.2009.1123
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To cite this page:
Atkinson, L. "ANSERIMIMUS :: from DinoChecker's dinosaur archive".
›. Web access: 25th Apr 2017.
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