Stratigraphie et paléoenvironnement des dépôts volcano-détritiques à dinosauriens du Jurassique inférieur de Toundoute (Province de Ouarzazate, Haut-Atlas – Maroc)

Christian, Michel; Monbaron, Michel; Allain, Ronan; Aquesbi, Najat; Dejax, Jean; Hernandez, Jean; Russell, Dale A.; Taquet, Philippe

doi:10.1007/s00015-005-1161-x

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…In this context, the more northern ancestral range of Tetanurae and more southern ancestral range of Ceratosauria, rather intuitively hints at an intermediary ‘connection’ range for stem-averostrans, into which the record T. admirabilis straightforwardly fits. In the end, the ancestral range of Averostra suggests that the stratigraphic gap at its base is more likely to be filled by new Early Jurassic records from the northern continents [ 38 , 88 , 89 ] or north Gondwana [ 90 ] than from more southern areas [ 7 , 73 ] of that supercontinent.…”

Section: Discussion: Biochronology and Palaeobiogeographymentioning

confidence: 99%

New dinosaur (Theropoda, stem -Averostra) from the earliest Jurassic of the La Quinta formation, Venezuelan Andes

et al. 2014

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Dinosaur skeletal remains are almost unknown from northern South America. One of the few exceptions comes from a small outcrop in the northernmost extension of the Andes, along the western border of Venezuela, where strata of the La Quinta Formation have yielded the ornithischian Laquintasaura venezuelae and other dinosaur remains. Here, we report isolated bones (ischium and tibia) of a small new theropod, Tachiraptor admirabilis gen. et sp. nov., which differs from all previously known members of the group by an unique suite of features of its tibial articulations. Comparative/phylogenetic studies place the new form as the sister taxon to Averostra, a theropod group that is known primarily from the Middle Jurassic onwards. A new U–Pb zircon date (isotope dilution thermal-ionization mass spectrometry; ID-TIMS method) from the bone bed matrix suggests an earliest Jurassic maximum age for the La Quinta Formation. A dispersal–vicariance analysis suggests that such a stratigraphic gap is more likely to be filled by new records from north and central Pangaea than from southern areas. Indeed, our data show that the sampled summer-wet equatorial belt, which yielded the new taxon, played a pivotal role in theropod evolution across the Triassic–Jurassic boundary.

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Section: Discussion: Biochronology and Palaeobiogeographymentioning

confidence: 99%

New dinosaur (Theropoda, stem -Averostra) from the earliest Jurassic of the La Quinta formation, Venezuelan Andes

et al. 2014

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Integrated GIS and analytic hierarchy process for flood risk assessment in the Dades Wadi watershed (Central High Atlas, Morocco)

Aichi,

Ikirri,

Ait Haddou

et al. 2024

Results in Earth Sciences

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An abelisauroid (Dinosauria: Theropoda) from the Early Jurassic of the High Atlas Mountains, Morocco, and the radiation of ceratosaurs

Allain¹,

Tykoski²,

Aquesbi

et al. 2007

Journal of Vertebrate Paleontology

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The fossil recorcl of abelisauroiclcarnivorousclinosaurs was previously restricted to Cretaceous secliments of and probably Europe.The of an incompletespecimen of a new basal gen. et sp. nov.. is reported from the late Early Jurassic of Moroccan Atlas Mountains. Phylogenetic analysis recovers Ceratosauroiclea ancl Coelophysoidea as sister lineages within Ceratosauria. and as a basal abelisauroicl. is the oldest known abelisauroiclancl extends the first appearance datum of this lineage by about 50 million years. The temporal. morphological. and phylogenetic gaps that have hitherto separated Triassic to Early Jurassic coelophysoids from Late Jurassic through Cretaceous The discovery of an African abelisauroicl in the Early Jurassic confirms at least a distribution of this group long before the Cretaceous.

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Stratigraphie et paléoenvironnement des dépôts volcano-détritiques à dinosauriens du Jurassique inférieur de Toundoute (Province de Ouarzazate, Haut-Atlas – Maroc)

Cited by 3 publications

References 4 publications

New dinosaur (Theropoda, stem -Averostra) from the earliest Jurassic of the La Quinta formation, Venezuelan Andes

New dinosaur (Theropoda, stem -Averostra) from the earliest Jurassic of the La Quinta formation, Venezuelan Andes

Integrated GIS and analytic hierarchy process for flood risk assessment in the Dades Wadi watershed (Central High Atlas, Morocco)

An abelisauroid (Dinosauria: Theropoda) from the Early Jurassic of the High Atlas Mountains, Morocco, and the radiation of ceratosaurs

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