Primitive dinosaur skeleton from Argentina and the early evolution of Dinosauria

Article Abstract:

Upper Triassic strata in northwestern Argentina have yielded a dinosaur skeleton resembling that of the predicted common ancestor of all dinosaurs. Grasping and raking hands suggest that this specimen was a predator, and the relative size of the forelimbs and hind limbs suggest that it was bipedal. The specimen will be classified as Eoraptor lunensis. Its discovery confirms the view that dinosaurs evolved rapidly from a small ancestor.

Evolution (Biology), Varieties, Reptiles, Fossil, Fossil reptiles, Triassic period

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Cretaceous multituberculate skeleton and the early evolution of the mammalian shoulder girdle

Article Abstract:

A different forelimb posture than other Cretaceous eucosmodonts was observed in a cretaceous eucosmodont multituberculate mammal skeleton with a well- conserved shoulder girdle found in Mongolia. Locomotion change seen in the skeletal structure had occurred in multituberculates and therians in the mid Jurassic period. Other postural and mobility characteristics of the specimen are similar to that of therians.

Discovery and exploration, Cretaceous period, Shoulder girdle, Mammals, Fossil, Fossil mammals

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Cannibalism in the Madagascan dinosaur Majungatholus atopus

Article Abstract:

Paleontologists have discovered dinosaur bones in Madagascar that bear theropod toothmarks, indicating that the species Majungatholus fed not only on sauropods, but also their own species.

Research and Development in the Physical, Engineering, and Life Sciences, Science & research, Madagascar, Paleontology, Nutritional aspects, Cannibalism, Cannibalism (Human behavior)

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