Ascent of Dinosaurs Linked to an Iridium Anomaly at the Triassic-Jurassic Boundary
Analysis of tetrapod footprints and skeletal material from more than 70 localities in eastern North America shows that large theropod dinosaurs appeared less than 10,000 years after the Triassic-Jurassic boundary, marking the establishment of dinosaur-dominated communities that prevailed for the next 135 million years.
IRRITATOR CHALLENGERI, A SPINOSAURID (DINOSAURIA: THEROPODA) FROM THE LOWER CRETACEOUS OF BRAZIL
Abstract The holotype of Irritator challengeri Martill et al., 1996 from the Romualdo Member of the Santana Formation (Lower Cretaceous) in northeastern Brazil represents the most complete skull of a…
Cranial osteology and phylogenetic relationships of Hamadasuchus rebouli (Crocodyliformes: Mesoeucrocodylia) from the Cretaceous of Morocco
A detailed description of the skull and part of the mandible of the crocodyliform reptile Hamadasuchus rebouli from the Kem Kem beds of south-eastern Morocco is presented, lending further support to the biogeographical hypothesis that faunal connections existed between Africa and South America well into mid-Cretaceous times.
Early Cretaceous Dinosaurs from the Sahara
- P. Sereno, JEFFREY A. Wilson, H. Larsson, D. B. Dutheil, H. Sues
- Geography, Environmental ScienceScience
- 14 October 1994
The discovery of dinosaurian skeletons from Lower Cretaceous beds in the southern Sahara shows that several lineages of tetanuran theropods and broad-toothed sauropods had a cosmopolitan distribution across Pangaea before the onset of continental fragmentation.
Anatomy and phylogenetic relationships of Chimaerasuchus paradoxus, an unusual crocodyliform reptile from the Lower Cretaceous of Hubei, China
Phylogenetic analysis indicates a sister-group relationship between Chimaerasuchus and Notosuchus, and between that clade and an as yet unnamed notosuchid from the Lower Cretaceous of Malawi, which casts further doubts on previous claims concerning the endemic distribution of the NotOSuchidae and other “Gondwanan” tetrapod taxa during the Cret Jurassic.
Redescription and Phylogenetic Relationships of Doswellia kaltenbachi (Diapsida: Archosauriformes) from the Upper Triassic of Virginia
Results include a sister-group relationship between Doswellia and proterochampsids, placement of Qianosuchus as a crurotarsan archosaur, and Yonghesuchus and Turfanosuchu as successive sister taxa to Archosauria.
Sichuanosuchus shuhanensis, a new ?early Cretaceous protosuchian (Archosauria: Crocodyliformes) from Sichuan (China), and the monophyly of Protosuchia
ABSTRACT A new protosuchian, Sichuanosuchus shuhanensis, sp. nov. from the ?Lower Cretaceous of Sichuan (China), is distinguished from other known basal crocodyliform archosaurs primarily by the…
A New Suchian Archosaur From The Upper Triassic Of North Carolina
The new specimen includes many bones previously unknown for Postosuchus and it allows a more complete differentiation of Postosuchsus from other ‘rauisuchian’ genera.
On Chirostenotes, a Late Cretaceous oviraptorosaur (Dinosauria: Theropoda) from western North America
- H. Sues
- Biology, Geography
- 15 December 1997
ABSTRACT A previously unrecognized partial skeleton of Chirostenotes pergracilis Gilmore, 1924 from the Upper Cretaceous Horseshoe Canyon Formation of Alberta (Canada) includes parts of the skull,…
A New Large-Bodied Oviraptorosaurian Theropod Dinosaur from the Latest Cretaceous of Western North America
Phylogenetic analysis indicates that Anzu is most closely related to Caenagnathus collinsi, a taxon that is definitively known only from a mandible from the Campanian Dinosaur Park Formation of Alberta, and the problematic oviraptorosaurs Microvenator and Gigantoraptor are recovered as basal caenagnaths, as has previously been suggested.