The hopping dead: Late Cretaceous frogs from the middle – late Campanian (Judithian) of western North America
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چکیده
منابع مشابه
Tiny pollen grains: first evidence of Saururaceae from the Late Cretaceous of western North America
BACKGROUND The Saururaceae, a very small family of Piperales comprising only six species in four genera, have a relatively scanty fossil record outside of Europe. The phylogenetic relationships of the four genera to each other are resolved, with the type genus Saururus occurring in both eastern North America and East Asia. No extant species occurs in western Eurasia. The most exceptional find s...
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The fossil record of centrosaurine ceratopsids is largely restricted to the northern region of western North America (Alberta, Montana and Alaska). Exceptions consist of single taxa from Utah (Diabloceratops) and China (Sinoceratops), plus otherwise fragmentary remains from the southern Western Interior of North America. Here, we describe a remarkable new taxon, Nasutoceratops titusi n. gen. et...
متن کاملDid Late Cretaceous cooling trigger the Campanian–Maastrichtian Boundary Event?
The Campanian–Maastrichtian (83–66 Ma) was a period of global climate cooling, featuring significant negative carbon-isotope (δ13C) anomalies, such as the Late Campanian Event (LCE) and the Campanian–Maastrichtian Boundary Event (CMBE). A variety of factors, including changes in temperature, oceanic circulation and gateway opening, have been invoked to explain these δ13C perturbations, but no p...
متن کاملA microraptorine (Dinosauria-Dromaeosauridae) from the Late Cretaceous of North America.
The fossil assemblages of the Late Cretaceous of North America are dominated by large-bodied dinosaur species. Associated skeletons of small dinosaurs are exceedingly rare, and small (<10 kg) carnivorous theropods have not previously been reported from these beds. Here, we describe a small dromaeosaurid from the 75-million-year-old Dinosaur Park Formation of Alberta, Canada. Hesperonychus eliza...
متن کاملParanyctoides and allies from the Late Cretaceous of North America and Asia
Paranyctoides is represented by three named, and possibly four unnamed species in the Late Cretaceous, North America. P. aralensis from the Late Cretaceous of Dzharakuduk, Uzbekistan, belongs in this or a closely allied taxon. Lower molars have low trigonids, well−developed paraconids not appressed against metaconids, talonids on m1–2 as wide or wider than trigonids, hypoconulids often closer t...
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ژورنال
عنوان ژورنال: Fossil Imprint
سال: 2016
ISSN: 2533-4069,2533-4050
DOI: 10.14446/fi.2016.78