curved ribs that protected their internal organs

the precursors of the famous Tyrannosaurus rex

or intraspecific interaction

antepasados de los actuales manatíes y dugongos

También tenía una cola larga y musculosa que probablemente usaba para equilibrarse mientras corría

Spinosaurus mirabilis Variant:Hand-painted curved ribs that protected theirSpinosaurus mirabilis is a recently described species of spinosaurid theropod dinosaur from fossil material found in the central Sahara, in the Jenguebi region of Niger, within early to middle Cenomanian river sediments, approximately 95 million years old. The species was formally established in a study led by Paul Sereno and colleagues, published in the journal Science in 2016, making it the first valid new species of the genus Spinosaurus described