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Spinosaurus is known to have eaten fish and small to medium terrestrial prey as well. [5] Evidence suggests that it was semiaquatic; how capable it was of swimming has been strongly contested. Spinosaurus's leg bones had osteosclerosis (high bone density), allowing for better buoyancy control.
The only major group of terrestrial lizards to go extinct at the end of the Cretaceous were the polyglyphanodontians, a diverse group of mainly herbivorous lizards known predominantly from the Northern Hemisphere. [109] The mosasaurs, a diverse group of large predatory marine reptiles, also became extinct. Fossil evidence indicates that ...
Juvenile spinosaurid fossils are somewhat rare. However, an ungual phalanx measuring 21 mm (0.83 in) belonging to a very young Spinosaurus indicates that Spinosaurus, and probably by extent other spinosaurids, may have developed their semiaquatic adaptations at birth or at a very young age and maintained the adaptations throughout their lives ...
The blue graph shows the apparent percentage (not the absolute number) of marine animal genera becoming extinct during any given time interval. It does not represent all marine species, just those that are readily fossilized.
Despite the world's last captive thylacine dying in 1936, the secretive animal wasn't declared extinct until 1986. More recently in 2007 the Baiji dolphin , a rare river dolphin native to China ...
c. 106 Ma – Spinosaurus evolves. c. 100.5 Ma - Stegosaurs go extinct; c. 100 Ma – First bees. c. 94 Ma - First mosasaurs. [36] c. 93 Ma - Cenomanian-Turonian boundary event causes the extinction of ichthyosaurs and pliosaurs. [37] c. 90 Ma – the Indian subcontinent splits from Gondwana, becoming an island continent. Snakes and ticks evolve.
Irritator is a genus of spinosaurid dinosaur that lived in what is now Brazil during the Albian stage of the Early Cretaceous Period, about 113 to 110 million years ago.It is known from a nearly complete skull found in the Romualdo Formation of the Araripe Basin.
The term 'heat dome' has gained prominence recently as climate change, El Niño and other variables have warmed global temperatures and shifted weather patterns. Heat wave or heat dome? Yes, there ...