Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebra
Class: Sauropsida
Superorder: Dinosauria
Suborder: Theropoda
Family: Alvarezsauridae
Subfamily: Parvicursorinae
Genus: Nemegtonykus
Lee et al., 2019
Species: N. citus
Binomial name
Nemegtonykus citus
Lee et al., 2019

Nemegtonykus (meaning "Nemegt claw" after the Nemegt Formation where it was found) is a genus of alvarezsaurid dinosaur from the Nemegt Formation in Mongolia. The type and only species is Nemegtonykus citus. It is only the second alvarezsaur known from the Nemegt Formation, the other being Mononykus.[1]


In 2008, the Korea-Mongolia International Dinosaur Expedition at the Altan Uul III site in the Gobi Desert excavated a dense concentration of theropod skeletons. Some of these were of Gobiraptor as well as a yet undescribed oviraptorid but three were of Alvarezsauridae. One specimen, MPC-D 100/206, was considered cf. Mononykus sp. but the other two represented a species new to science.[1]

Pelvis and axial skeleton

In 2019, the type species Nemegtonykus citus was named and described by Lee Sungjin, Park Jin-Young, Lee Yuong-Nam, Kim Su-Hwan, Lü Junchang, Rinchen Barsbold and Khishigjav Tsogtbaatar. The generic name combines a reference to the Nemegt with a Greek ὄνυξ, onyx, "claw", analogous to Mononykus. The scientific name means "the fast one" in Latin.[1]


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