Genus
Valid Extinct

Bajadasaurus

Gallina et al. 2019

Bajadasaurus is a genus of sauropod dinosaur from the Early Cretaceous epoch of northern Patagonia, Argentina. It was first described in 2019 based on a single specimen found in 2010 that includes a largely complete skull and parts of the neck. The only species is Bajadasaurus pronuspinax. The genus is classified as a member of the Dicraeosauridae, a group of relatively small and short-necked sauropods.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
1
Group
Dinosaures
Herbivore Ground dwelling, gregarious Terrestrial
Bajadasaurus
click to enlarge
Skeletal elements of Bajadasaurus pronuspinax gen. et sp. nov (MMCh-PV 75). (A–C) Skull roof and braincase in posterior (A), left lateral (B) and right lateral (C) views. (D,E) Left lower jaw in dorsal (D) and medial (E) views. F, Dentaries in anterior view. (G) Pterygoids in ventral view. (H) Left maxilla in medial view. (I) Left lacrimal in lateral view. (J) Left quadratojugal in lateral view. (K,L) Right quadrate in medial (K) and posterior (L) views. (M) Proatlases in dorsal view. (N) Atlantal neurapophyses in anterior view. (O,P), Axis in left lateral (O) and anterior (P) views. (Q,R) Fifth cervical vertebra in left lateral (Q) and anterior (R) views. an, angular; ar, articular; bo, basioccipital; bt, basal tubera; btp, basipterygoid process; ch, ‘chin’ of dentary; cn, cranial nerve; d, dentary; di, diapophysis; f, frontal; fm, foramen magnum; fo, fenestra ovalis; ls, laterosphenoid; met, metotic foramen; mp, medial process; nc, neural canal; ns, neural spine; os, orbitosphenoid; p, parietal; pfo, pneumatic fossa; po, postorbital; pocdf, postzygapophyseal centrodiapophyseal fossa; podl, postzygodiapophyseal lamina; popr, paraoccipital process; poz, postzygapophysis; pra, prearticular; pre, prezygapophysis; prsl, prespinal lamina; ptf, postemporal fenestra; qf, quadrate fossa; rm, replacement maxillary tooth; sa, surangular; sp, splenial; sq, squamosal; stf, supratemporal fenestra; vk, ventral keel; vp, ventral process. © Pablo A. Gallina, Sebastián Apesteguía, Juan I. Canale & Alejandro Haluza · CC BY 4.0 · Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
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Saurischia Unranked clade
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Sauropodomorpha Unranked clade
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Massopoda Unranked clade
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Sauropodiformes Unranked clade
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Sauropoda Unranked clade
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Gravisauria Unranked clade
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Eusauropoda Unranked clade
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Neosauropoda Unranked clade
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Diplodocoidea Unranked clade
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Diplodocimorpha Unranked clade
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Flagellicaudata Unranked clade
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Dicraeosauridae Unranked clade
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Dicraeosaurinae Unranked clade
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Bajadasaurus Genus
Fossil sites 1 geolocated sites
Distribution
Top countries
🇦🇷 Argentina
1
Geological formations
Bajada Colorada
1
Temporal distribution
Valanginian (137.05–132.6 Ma)
1
Species (1)
Bajadasaurus pronuspinax 139 Ma
Images 1
Bibliography
Original description
P. A. Gallina, S. Apesteguía, and J. I. Canale, A. Haluza. 2019. A new long-spined dinosaur from Patagonia sheds light on sauropod defense system. Scientific Reports 9:1392:1-10 DOI ↗
Bibliography (1)
P. A. Gallina, S. Apesteguía, and J. I. Canale, A. Haluza. 2019. A new long-spined dinosaur from Patagonia sheds light on sauropod defense system. Scientific Reports 9:1392:1-10 DOI ↗