Spinosaurus Timeline

Spinosaurus > Timeline

Spinosaurus Timeline

Time	Event
Approximately 220 million years ago	First dinosaurs evolve during the Triassic period.
Approximately 112 million years ago	Spinosaurus first evolves during the early Cretaceous period.
Approximately 97 million years ago	Spinosaurus extinct.
Approximately 65 million years ago	Cretaceous-Tertiary extinction event: All non-avian dinosaurs go extinct (although Spinosaurus has already been extinct for many millions of years by this time). The K/T Extinction Event may have been caused by an asteroid impact:
1912	First Spinosaurus remains found and described.
1915	Richard Markgraf discovers a partial Spinosaurus skeleton of a dinosaur in the Bahariya Formation of western Egypt. Richard Markgraf:
1915	Ernst Stromer writes an article describing the animal, he assigns it a new Genus and Species, and names it Spinosaurus aegyptiacus. Ernst Stromer:
1926	Friedrich von Huene rates Spinosaurus as the largest Theropod in a survey. Friedrich von Huene (left):
1934	Based on additional fragmentary remains from the Bahariya Formation. Ernst Stromer tentatively identifies a possible second species of Spinosaurus which he calls Spinosaurus B. However, in retrospect, it now seems that these remains most likely belong to a different dinosaur, probably Carcharodontosaurus or Sigilmassasaurus (many scientists consider Sigilmassasaurus itself to be an invalid identification, and think Sigilmassasaurus is the same animal as Carcharodontosaurus).
1944	During World War II, a British bombing raid on Munich severely damages the Paläontologisches Museum München and destroys the Spinosaurus specimen described by Ernst Stromer in 1915. Fortunately however, Stromer's detailed drawings and descriptions of the specimen remain.
1988	Gregory S. Paul rates Spinosaurus as the largest theropod in his survey.
1996	Canadian paleontologist Dale Russell identifies a second species of Spinosaurus, which he names Spinosaurus maroccanus. Not all scientists however consider this a valid second species.
2001	Spinosaurus appears in the movie Jurassic Park III.
2007	François Therrien and Donald Henderson suggest in a scientific paper that Spinosaurus may have been smaller than previously suggested. However, some other scientists dispute their analysis.
2014	New research published in Science confirm earlier research imputing a massive size to Spinosaurus.

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