نتایج جستجو برای: late cretaceous period falcon

تعداد نتایج: 672578  

Journal: :Biology letters 2013
Valentin Fischer Robert M Appleby Darren Naish Jeff Liston James B Riding Stephen Brindley Pascal Godefroit

Cretaceous ichthyosaurs have typically been considered a small, homogeneous assemblage sharing a common Late Jurassic ancestor. Their low diversity and disparity have been interpreted as indicative of a decline leading to their Cenomanian extinction. We describe the first post-Triassic ichthyosaur from the Middle East, Malawania anachronus gen. et sp. nov. from the Early Cretaceous of Iraq, and...

2011
Nicolás E. Campione David C. Evans

The well-sampled Late Cretaceous fossil record of North America remains the only high-resolution dataset for evaluating patterns of dinosaur diversity leading up to the terminal Cretaceous extinction event. Hadrosaurine hadrosaurids (Dinosauria: Ornithopoda) closely related to Edmontosaurus are among the most common megaherbivores in latest Campanian and Maastrichtian deposits of western North ...

Journal: :Science 2000
P Wilf C C Labandeira W J Kress C L Staines D M Windsor A L Allen K R Johnson

Stereotyped feeding damage attributable solely to rolled-leaf hispine beetles is documented on latest Cretaceous and early Eocene ginger leaves from North Dakota and Wyoming. Hispine beetles (6000 extant species) therefore evolved at least 20 million years earlier than suggested by insect body fossils, and their specialized associations with gingers and ginger relatives are ancient and phylogen...

Journal: :Danmarks Geologiske Undersøgelse Serie B 1982

2016
Elizabeth Martin-Silverstone Mark P Witton Victoria M Arbour Philip J Currie

Pterosaur fossils from the Campanian-Maastrichtian of North America have been reported from the continental interior, but few have been described from the west coast. The first pterosaur from the Campanian Northumberland Formation (Nanaimo Group) of Hornby Island, British Columbia, is represented here by a humerus, dorsal vertebrae (including three fused notarial vertebrae), and other fragments...

Journal: :Current biology : CB 2017
Valentin Fischer Roger B J Benson Nikolay G Zverkov Laura C Soul Maxim S Arkhangelsky Olivier Lambert Ilya M Stenshin Gleb N Uspensky Patrick S Druckenmiller

Plesiosaurs were the longest-surviving group of secondarily marine tetrapods, comparable in diversity to today's cetaceans. During their long evolutionary history, which spanned the Jurassic and the Cretaceous (201 to 66 Ma), plesiosaurs repeatedly evolved long- and short-necked body plans [1, 2]. Despite this postcranial plasticity, short-necked plesiosaur clades have traditionally been regard...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Anjali Goswami Guntupalli V R Prasad Paul Upchurch Doug M Boyer Erik R Seiffert Omkar Verma Emmanuel Gheerbrant John J Flynn

India's Late Cretaceous fossil mammals include the only undisputed pre-Tertiary Gondwanan eutherians, such as Deccanolestes. Recent studies have suggested a relationship between Deccanolestes and African and European Paleocene adapisoriculids, which have been variably identified as stem euarchontans, stem primates, lipotyphlan insectivores, or afrosoricids. Support for a close relationship betw...

2015
Susan V. Roberts Douglas W. Burbank

In order to determine the pattern and timing of exhumation and uplift in the Teton Range, fission-track analysis of apatites has been applied to three sections encompassing ~ 2 km of vertical relief along the Teton escarpment. The resulting data provide new insights on the doming of the Precambrian-Cambrian unconformity and on the Teton exhumation/uplift history prior to the Miocene initiation ...

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