Browsing by Author "Vargas Milne, Alexander"

Now showing items 1-7 of 7

    • Bird embryos uncover homology and evolution of the dinosaur ankle 
      Ossa Fuentes, Luis; Mpodozis Marín, Jorge; Vargas Milne, Alexander (Nature, 2015)
      The anklebone (astragalus) of dinosaurs presents a characteristic upward projection, the 'ascending process' (ASC). The ASC is present in modern birds, but develops a separate ossification centre, and projects from the ...
    • An enigmatic plant-eating theropod from the Late Jurassic period of Chile 
      Novas, Fernando E.; Salgado, Leonardo; Suárez, Manuel; Agnolín, Federico L.; Ezcurra, Martín D.; Chimento, Nicolás R.; Cruz, Rita de la; Isasi, Marcelo P.; Vargas Milne, Alexander; Rubilar Rogers, David (Macmillan, 2015)
      Theropod dinosaurs were the dominant predators inmost Mesozoic era terrestrial ecosystems(1). Early theropod evolution is currently interpreted as the diversification of various carnivorous and cursorial taxa, whereas the ...
    • Flying Dinosaurs: How Fearsome Reptiles Became Birds 
      Vargas Milne, Alexander (Wiley, 2015)
      Flying Dinosaurs is a timely popular work, focusing especially on the latest research related to the dinosaur-bird link. This short and enjoyable book provides an updated summary of discoveries such as dinosaurs preserved ...
    • Freshwater turtles (Testudines: Pleurodira) in the Upper Cretaceous of Chilean Patagonia 
      Alarcón Muñoz, Jhonatan; Soto Acuña, Sergio; Manríquez, Leslie M. E.; Fernández, Roy A.; Bajor, Dániel; Guevara, Juan Pablo; Suazo Lara, Felipe; Leppe, Marcelo A.; Vargas Milne, Alexander (Elsevier, 2020)
      We describe remains of freshwater turtles from the Upper Cretaceous of Chilean Patagonia. The fossils, which comprise isolated shell fragments and incomplete appendicular bones, were recovered from meandering fluvial ...
    • Molecular development of fibular reduction in birds and its evolution from dinosaurs 
      Botelhoc, Joao; Smith Paredes, Daniel; Soto Acuña, Sergio; O'Connor, Jingmai; Palma Alvarado, Verónica; Vargas Milne, Alexander (WILEY-BLACKWELL, 2016)
      Birds have a distally reduced, splinter-like fibula that is shorter than the tibia. In embryonic development, both skeletal elements start out with similar lengths. We examined molecular markers of cartilage differentiation ...
    • A new postcranial skeleton of an elasmosaurid plesiosaur from the Upper Cretaceous of central Chile and ... 
      Otero, Rodrigo A.; Soto Acuña, Sergio; Vargas Milne, Alexander; Rubilar Rogers, David (Elsevier, 2014)
      We describe a new specimen of an elasmosaurid plesiosaur from the upper Maastrichtian of central Chile. The specimen includes a relatively complete dorso-caudal series, a few cervical vertebrae, and a fragmentary pelvic ...
    • Skeletal plasticity in response to embryonic muscular activity underlies the development and evolution of ... 
      Botelho, João; Smith Paredes, Daniel; Soto Acuña, Sergio; Mpodozis Marín, Jorge; Palma Alvarado, Verónica; Vargas Milne, Alexander (Nature, 2015)
      Most birds have an opposable digit 1 (hallux) allowing the foot to grasp, which evolved from the non-opposable hallux of early theropod dinosaurs. An important morphological difference with early theropods is the twisting ...