Dino Day: Spinosaurus aegyptiacus

Adapted from page 34:

The Spinosaurus aegyptiacus lived during the early Upper Cretaceous (Cenomanian, ca. 100.5–93.9 Ma) in north-central Gondwana (present-day Algeria, Egypt, and Morocco). It was a gigantic theropod and the longest of them all. It was as long as a bus and car lined up and weighed as much as an African elephant and a hippopotamus together. The traditional appearance of this dinosaur changed due to a new specimen that showed its true proportions: It had very short hind legs and a very long body.

Apparently, there are no differences between the footprints of primitive megalosauroids and those of their direct descendants, the spinosaurids. Nevertheless, the former are exclusively from the Jurassic, while the latter are characteristic of the Cretaceous, and so Chapus, Satapliasauropus, and similar specimens could be footprints of spinosaurids.

Dinosaur Facts and Figures: The Theropods and Other Dinosauriformes
By Rubén Molina-Pérez and Asier Larramendi
Illustrations byAndrey Atuchin and Sante Mazzei

The theropod dinosaurs ruled the planet for millions of years, with species ranging from the mighty Tyrannosaurus rex to feathered raptors no bigger than turkeys. Dinosaur Facts and Figures is a stunningly illustrated book of records for these marvelous creatures—such as the biggest, the smallest, and the fastest theropods, as well as the ones with the most powerful bite.

This one-of-a-kind compendium features more than 3,000 records, covers some 750 theropod species, and includes a wealth of illustrations ranging from diagrams and technical drawings to full-color reconstructions of specimens. The book is divided into sections that put numerous amazing theropod facts at your fingertips. “Comparing Species” is organized by taxonomic group and gives comparisons of the size of species, how long ago they lived, and when they were discovered. “Mesozoic Calendar” includes spreads showing the positions of the continents at different geological time periods and reconstructions of creatures from each period. “Prehistoric Puzzle” compares bones, teeth, and feathers while “Theropod Life” uses vivid, user-friendly graphics to answer questions such as which dinosaur was the smartest and which had the most powerful bite. Other sections chart theropod distribution on the contemporary world map, provide comprehensive illustrated listings of footprints, compile the physical specifications of all known theropods and Mesozoic birds, and much more.

  • The essential illustrated record book for anyone interested in dinosaurs
  • Features thousands of records on everything from the smartest and fastest theropods to the largest theropod eggs
  • Includes more than 2,000 diagrams and drawings and more than 300 digital reconstructions
  • Covers more than 750 theropod species, including Mesozoic birds and other dinosauromorphs
  • Provides detailed listings of footprints, biometric specifications, and scholarly and popular references
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