an alvarezsaurid theropod dinosaur from the Late Cretaceous of Mongolia.
Perle et al
is derived from the Greek "mono" (one, single) and "onykh" (claw), named for a short, robust forelimb possessing a single stout claw. It was originally named Mononychus
(with a "ch" instead of a "k") in 1993, but was changed later the same year because German entomologist Johann Schueppel had already assigned that name to a beetle.
The species epithet
, is derived from the Greek "ole-kranon" (elbow head), and makes no sense on face value. However, it apparently refers to its elbow-like structure that gave the forearms unexpected strength for their small size.
The first remains of Mononykus
were discovered in the
Nemegt Formation at Bugeen Tsav (aka Bugin Tsav, Bugin Tsav), Ömnögovi Province, Mongolia, by B. Namsarai—a preparator at the Mongolian Museum of Natural History—during the 1987 Soviet-Mongolian Paleontologic expedition.
(IGM N107/6) is a complete braincase, small fragments of skull bones, and a partial skeleton minus the tail.
: Late Cretaceous
: 71-68 mya
Est. max. length
: 0.9 meters
Est. max. hip height
Est. max. weight
: 6 Kg
• A. Perle, M. A. Norell, L. M. Chiappe and J. M. Clark (1993) "Flightless bird from the Cretaceous of Mongolia".
• A. Perle, L. M. Chiappe, R. Barsbold, J. M. Clark, M. A. Norell (1994) "Skeletal Morphology of Mononykus olecranus
(Theropoda: Avialae) from the Late Cretaceous of Mongolia".
• Senter, P. (2005) "Function in the stunted forelimbs of Mononykus olecranus
(Theropoda), a dinosaurian anteater".
• L.M. Chiappe, M.A. Norell and J.M. Clark (2002) "The Cretaceous short-armed Alvarezsauridae. Mononykus
and its kin" in "Mesozoic Birds: Above the Heads of Dinosaurs
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