Information om | Engelska ordet AETOSAURS

Exempel på hur man kan använda AETOSAURS i en mening

• Although broadly classified as reptiles, which traditionally exclude birds, the cladistic sense of the term includes all living and extinct relatives of birds and crocodilians such as non-avian dinosaurs, pterosaurs, phytosaurs, aetosaurs and rauisuchians as well as many Mesozoic marine reptiles.
• Rauisuchians, as a traditional taxonomic group, were considered distinct from other Triassic archosaur groups such as early dinosaurs, phytosaurs (crocodile-like carnivores), aetosaurs (armored herbivores), and crocodylomorphs (lightly-built crocodilian ancestors).
• In publications from 1882 and 1890 Marsh himself casts doubt on this however, growing doubtful of his prior hypothesis and arriving at the conclusion that Hallopus may be a link between typical dinosaurs and what he considered to be more primitive forms (aetosaurs, crocodilians and phytosaurs).
• On land, herbivorous pseudosuchians are quite common, including the shuvosaurid Shuvosaurus inexpectatus, the aetosaurs Typothorax coccinarum, and the small aetosauriform Revueltosaurus callenderi.
• The vertebrae have keels, unusually among aetosaurs, and the axis vertebra has a noticeable concavity in the sides above which the zygapophyses protrude.
• The strata date to the late Carnian and early Norian stages, making Aetosauroides one of the oldest aetosaurs.
• In other archosaurs, including rauisuchians, aetosaurs, pterosaurs, and dinosauromorphs, the nasal-prefrontal contact separates the frontal from the lacrimal.
• Since then, cladistic work has redefined the term "archosaur" to only include Avemetatarsalia (a lineage including pterosaurs and dinosaurs, such as modern birds) and Pseudosuchia (a lineage including modern crocodylians and their extinct relatives such as aetosaurs and raisuchids).
• Osteoderms are found in many groups of extant and extinct reptiles and amphibians, including lizards, crocodilians, frogs, temnospondyls (extinct amphibians), various groups of dinosaurs (most notably ankylosaurs and stegosaurians), phytosaurs, aetosaurs, placodonts, and hupehsuchians (marine reptiles with possible ichthyosaur affinities).
• The Chinle Group is particularly important to paleontologists interested in aetosaurs, as it has been critical in establishing their biochronology in the Late Triassic.
• However, the authors warn that, since smaller individuals have co-ossified neurocentral sutures, they may not be a reliable factor in determining maturity in aetosaurs.
• For example, the premaxillary posterodorsal process of Revueltosaurus also bisects its nasal, and a posterodorsal process of the maxilla is present in some aetosaurs and poposauroids.
• The fauna of Fleming Fjord is diverse, including sauropodomorph dinosaurs, pterosaurs, temnospondyls, mammaliaforms, aetosaurs, and other taxa.
• However, Quebrada del Barro is more abundant in sphenodontians (Sphenotitan), tritheledontid cynodonts, and coelophysoid dinosaurs (Lucianovenator), while sauropodomorphs are somewhat less common and aetosaurs are completely absent, in contrast to the Los Colorados Formation.
• The paramedian osteoderms are wide and lie flat, without any apparent flexure (a trait convergent with some desmatosuchin aetosaurs) The paramedians possess knob- or spine-like dorsal eminences which are strongly offset medially and practically never contact the rear margins of their respective plates.
• reseri was identified as a left paramedian based on the position of the anterior bar, an unornamented strip of bone that is known to lie on the front edge of the osteoderm in other aetosaurs.
• The ectepicondylar groove on the humerus reported by Ochev is present in Prolacerta, Proterosuchus, phytosaurs, aetosaurs and several paracrocodylomorphs.
• More basal pseudosuchians such as aetosaurs, ornithosuchids, Gracilisuchus, and Ticinosuchus lack these two traits.
• This study suggests that Aetosaurinae is paraphyletic, and that aetosaurines represent a grade of early aetosaurs that developed into desmatosuchines and typothoracisines later in the Triassic.
• Fossil eggs and nests from this region that may have inspired the legend were left behind by creatures like possible aetosaurs, giant condors, duck-billed dinosaurs, possible phytosaurs, large theropods, and sea turtles.

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