| Jaculinykus Temporal range: Late Cretaceous,
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| Holotype specimen and skeletal reconstruction | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Family: | †Alvarezsauridae |
| Subfamily: | †Parvicursorinae |
| Genus: | †Jaculinykus |
| Species: | †J. yaruui
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| Binomial name | |
| †Jaculinykus yaruui Kubo et al., 2023
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Jaculinykus (meaning "Jaculus claw") is an extinct genus of alvarezsaurid theropod dinosaur from the Late Cretaceous Baruungoyot Formation of Mongolia. The genus contains a single species, J. yaruui, known from a nearly complete articulated skeleton including bones of the skull. Jaculinykus is notable for its unique hand, which has a hypertrophied first digit and greatly reduced second digit, which is intermediate between the tridactyl hand of Shuvuuia and monodactyl hand of Linhenykus.[1]
- ^ Kubo, Kohta; Kobayashi, Yoshitsugu; Chinzorig, Tsogtbaatar; Tsogtbaatar, Khishigjav (2023-11-15). "A new alvarezsaurid dinosaur (Theropoda, Alvarezsauria) from the Upper Cretaceous Baruungoyot Formation of Mongolia provides insights for bird-like sleeping behavior in non-avian dinosaurs". PLOS ONE. 18 (11): e0293801. doi:10.1371/journal.pone.0293801. ISSN 1932-6203. PMC 10651048.