antepasados de los actuales manatíes y dugongos

always within relatively high thermal ranges

curved ribs that protected their internal organs

Although its size was considerably smaller than that of Tyrannosaurus rex

Spinosaurus mirabilis Variant:Hand-painted antepasados de los actuales manatíesSpinosaurus 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