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.

Spinosaurus

 
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:
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:
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:
Ernst Stromer

 
1926
 
Friedrich von Huene rates Spinosaurus as the largest Theropod in a survey.

Friedrich von Huene (left):
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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