Genus
Valid Extinct

Jaculinykus

Kubo et al. 2023

Jaculinykus 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.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
1
Group
Dinosaures
Carnivore Ground dwelling, solitary Terrestrial
Jaculinykus
click to enlarge
Holotype of Jaculinykus yaruui gen. et sp. nov. (MPC-D 100/209). (A) Photograph of the specimen. (B) Explanatory drawing of (A). Highlighted areas refer to the indication of the skeletal elements; skull in green, tail in grey, pectoral girdle and forelimbs in red, pelvis and hind limbs in purple. (C) Reconstruction of Jaculinykus yaruui gen. et sp. nov. Grey areas are missing parts. © Kohta Kubo, Yoshitsugu Kobayashi, Tsogtbaatar Chinzorig & Khishigjav Tsogtbaatar · CC BY 4.0 · Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
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Theropoda Unranked clade
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Neotheropoda Unranked clade
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Averostra Unranked clade
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Tetanurae Unranked clade
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Coelurosauria Unranked clade
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Alvarezsauria Infraorder
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Alvarezsauroidea Unranked clade
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Alvarezsauridae Family
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Parvicursorinae Subfamily
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Jaculinykus Genus
Fossil sites 1 geolocated sites
Distribution
Top countries
🇲🇳 Mongolia
1
Geological formations
Baruungoyot
1
Temporal distribution
Campanian (83.6–72.2 Ma)
1
Species (1)
Jaculinykus yaruui 84 Ma
Images 1
Bibliography
Original description
K. Kubo, Y. Kobayashi, and T. Chinzorig, K. Tsogtbaatar. 2023. A new alvarezsaurid dinosaur (Theropoda, Alvarezsauria) from the Upper Cretaceous Baruungoyot Formation of Mongolia provides insights for bird-like sleeping behavior in nonavian dinosaurs. PLoS ONE 18(11):e0293801:1-38 DOI ↗
Bibliography (1)
K. Kubo, Y. Kobayashi, and T. Chinzorig, K. Tsogtbaatar. 2023. A new alvarezsaurid dinosaur (Theropoda, Alvarezsauria) from the Upper Cretaceous Baruungoyot Formation of Mongolia provides insights for bird-like sleeping behavior in nonavian dinosaurs. PLoS ONE 18(11):e0293801:1-38 DOI ↗