Genre
Valide Éteint

Dakotaraptor

DePalma et al. 2015

Dakotaraptor est un genre fossile de dinosaures théropodes de la famille des Dromaeosauridae du Crétacé supérieur (Maastrichien). Ce grand dromaeosauridé, d'une taille estimée à 5,5 mètres, est représenté par une seule espèce, Dakotaraptor steini, dont les restes fossiles ont été découverts dans la formation de Hell Creek, dans le Dakota du Sud, aux États-Unis.

Plage temporelle
Trias
Jurassique
Crétacé
Paléogène
Néogène
252 201 145 66 0 Ma
Occurrences PBDB
2
Groupe
Dinosaures
Carnivore Vivant au sol Terrestre
Dakotaraptor
cliquer pour agrandir
Skeletal diagram featuring the known elements and size of the holotype of the giant dromaeosaurids Dakotaraptor steini. The holotype PBMNH.P.10.113.T, consists of: Right pedal ungual II, right pedal ungual III, right femur, left and right tibia, left astragalus and calcaneum, left metatarsal II and IV, right metatarsal IV, isolated fragmentary dorsal centrum, 10 caudal vertebrae, left and right humerus, left and right radius, left and right ulna, right metacarpal I and II, three fragmentary left manual phalanges. The tooth depicted here belongs to specimens PBMNH.P.10.119.T and PBMNH.P.10.121.T, which are estimated to have come from an adult individual too.[1] The relationships of Dakotaraptor within the Dromaeosauridae are complex; most cladograms exclude Dakotaraptor, however, in the original description it was placed between the Dromaeosaurinae, which contains heavy-built animals such as Achillobator and Utahraptor, despite the relatively slender anatomy of this animal.[1] Surprinsingly enough, in the latest phylogenetic analysis, Dakotaraptor was placed in the Unenlagiinae, being the sister taxon to Unenlagia.[2] In the original description, three furculae were associated to the genus, specimens NCSM 13170, KUVP 152429 and the one from the holotype PBMNH P.10.113.T. These furculae were revised, and they turned out to be from a entoplastron belonging to a trionychid turtle. Therefore, the proposed furcula for the hypodigm of Dakotaraptor should be excluded, the same goes for the referred specimens.[3] Color Key   Known   Unknown © PaleoNeolitic · CC BY-SA 4.0 · Wikimedia

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Classification
Dinosauria Clade non classé
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Theropoda Clade non classé
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Neotheropoda Clade non classé
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Averostra Clade non classé
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Tetanurae Clade non classé
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Coelurosauria Clade non classé
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Maniraptora Clade non classé
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Paraves Clade non classé
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Deinonychosauria Infraordre
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Dromaeosauridae Famille
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Eudromaeosauria Clade non classé
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Dromaeosaurinae Sous-famille
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Dakotaraptor Genre
Mesures
Longueur
4,9 m ⓘ
Dakotaraptor steini
Masse
260 kg ⓘ
Dakotaraptor steini
Sites de découverte 2 sites géolocalisés
Répartition
Principaux pays
🇺🇸 États-Unis
2
Formations géologiques
Hell Creek
2
Distribution temporelle
Maastrichtien (72.2–66 Ma)
2
Espèces (1)
Dakotaraptor steini 72 Ma
Images 3
Bibliographie
Description originale
R. A. DePalma, D. A. Burnham, and L. D. Martin, P. L. Larson, R. T. Bakker. 2015. The first giant raptor (Theropoda: Dromaeosauridae) from the Hell Creek Formation. The University of Kansas Paleontological Contributions 14:1-16
Bibliographie (2)
W. W. Stein. 2021. The paleontology, geology and taphonomy of the Tooth Draw Deposit; Hell Creek Formation (Maastrictian), Butte County, South Dakota. The Journal of Paleontological Sciences JPS.C.21:0001:1-108
R. A. DePalma, D. A. Burnham, and L. D. Martin, P. L. Larson, R. T. Bakker. 2015. The first giant raptor (Theropoda: Dromaeosauridae) from the Hell Creek Formation. The University of Kansas Paleontological Contributions 14:1-16