A NEW THEROPOD DINOSAUR FROM THE LOWER CRETACEOUS OF MONTANA

@article{Ostrom2019ANT,
  title={A NEW THEROPOD DINOSAUR FROM THE LOWER CRETACEOUS OF MONTANA},
  author={John Harold Ostrom},
  journal={Osteology of Deinonychus antirrhopus, an Unusual Theropod from the Lower Cretaceous of Montana},
  year={2019}
}
  • J. H. Ostrom
  • Published 7 July 1969
  • Environmental Science, Biology
  • Osteology of Deinonychus antirrhopus, an Unusual Theropod from the Lower Cretaceous of Montana
Deinonychus antirrhopus, a new genus and species of theropod dinosaur is described from the Cloverly Formation (Lower Cretaceous) of southern Montana. The species is characterized by a highly specialized pes bearing a very large, trenchant claw on digit II, a highly raptorial manus with a very mobile carpus, and a specialized caudal series with extremely long prezygapophyseal and chevron rods. The new species is closely related to Dromaeosaunis albertemis, which features similar specialization… 

Figures from this paper

A New Dromaeosaurid (Dinosauria: Coelurosauria) from Khulsan, Central Mongolia
TLDR
A new species of dromaeosaurid—Kuru kulla, gen. et sp. nov.—based on a partial skeleton from the Late Cretaceous Khulsan locality (Barun Goyot Formation) of Mongolia is described, characterized by a unique combination of characters, including a mediolaterally narrow metatarsal II and a lacrimal with a poorly developed boss on its lateral surface.
On a new maniraptoran dinosaur (Theropoda) from the upper Cretaceous of Neuquen, Patagonia, Argentina
3 ABSTRACT: The "Futalognko" site, situated at the margins of the Los Barreales lake about 90 km northwest of Neuquen city (Patagonia), revealed several new dinosaur specimens, all from the
A New Dromaeosaurid Theropod from Ukhaa Tolgod (Ömnögov, Mongolia)
TLDR
A new dromaeosaurid theropod from the Upper Cretaceous Djadokhta Formation of Ukhaa Tolgod, Mongolia is described, with a well-preserved skull and cervical series and a jugal–squamosal contact that excludes the postorbital from the margin of the infratemporal fenestra.
Taphonomy and paleobiological implications of Tenontosaurus-Deinonychus associations
ABSTRACT The discovery of a nearly complete skeleton of Tenontosaurus tilletti and closely associated multiple shed teeth of the dromaeosaur Deinonychus antirrhopus provides evidence that may support
Aspects of the history, anatomy, taxonomy and palaeobiology of sauropod dinosaurs
TLDR
Xenoposeidon proneneukos is a new neosauropod from the Lower Cretaceous Hastings Bed Group, known from a single partial dorsal vertebra, and the distinctive morphology suggests that Xenoboseidon may represent a new sauropod family, extending saurood disparity as well as bringing to four the number of sauro pod families known from the Wealden.
A new microraptorine theropod from the Jehol Biota and growth in early dromaeosaurids
TLDR
Comparison of histology in the new taxon and Sinornithosaurus indicates that macroscopic signs of maturity developed after the first year, but before cessation of growth, demonstrating that nonhistological indicators of adulthood may be misleading when applied to dromaeosaurids.
First record of the family Dromaeosauridae (Dinosauria: Theropoda) in the Cretaceous of Gondwana (Wadi Milk Formation, northern Sudan)
KurzfassungDie cenomane Wadi Milk Formation des Sudan lieferte eine reiche kontinentale Wirbeltierfauna. Neben Fragmenten von großen Theropoden verweisen disartikulierte Fußphalangen-Elemente und ein
Description and ontogenetic assessment of a new Jehol microraptorine
TLDR
It is confirmed that this microraptorine theropod was around a single year in age and still growing at death, but that the growth had slowed, which indicates that presence of a variety of feather types, including filamentous feathers, pennaceous primaries, and long rectrices, likely used for ornamentation, preceded skeletal maturity and full adult size.
The arctometatarsalian pes, an unusual structure of the metatarsus of Cretaceous Theropoda (Dinosauria: Saurischia)
  • T. Holtz
  • Biology, Environmental Science
  • 1995
TLDR
Morphometric analysis indicates that the arctometatarsalian structure is significantly more elongate and gracile than underived metatarsi, and this structure is associated with relatively elongate distal hind limbs per unit femoral length.
A new vertebrate fauna from the Lower Cretaceous Holly Creek Formation of the Trinity Group, southwest Arkansas, USA
TLDR
The fauna of the Holly Creek Formation is similar to other, widely scattered late Early Cretaceous assemblages across North America and suggests the presence of a low-diversity, broadly distributed continental ecosystem of the Early CRETaceous following the Late Jurassic faunal turnover.
...
...