Dino Day: An Unnamed Species

Adapted from page 58:

This unnamed species is from the late Upper Cretaceous (Maastrichtian, ca. 72.1–66 Ma) of central Laurasia (present-day European Russia). It is a large tooth that, compared to the other dromaeosaurids, must have been the largest. It was a raptor heavier than a brown bear, capable of killing prey even greater than itself. Recently it has been discovered that the body proportions of dromaeosaurids and velociraptorids were different. They had shorter faces, ser- rated teeth, longer legs, and shorter bodies and tails. All this substantially changes their former popular aspect.

 

 

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

Dino Day: Therizinosaurus cheloniformis

Adapted from page 50:

The Therizinosaurus cheloniformis (“tortoise-shaped scythe lizard”): Lived during the late Upper Cretaceous (lower Maastrichtian, 72.1–69 Ma) in eastern Laurasia (present-day Mongolia). It was known only for its huge nails, which seemed to be part of the shell of a giant turtle over 3 m long. Later, a few more bones were found, including a practically complete anterior limb that was 2.5 m long. Along with Deinocheirus, they had the largest arms among the theropods. Their nails had the appearance of scythes, which must have been impressive when fully extended. When compared with other therizinosaurids, such as Nothronychus, it is concluded that this arm must have belonged to an animal bigger than an Asian elephant.

 

 

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

Dino Day: Bonapartenykus ultimus

Adapted from page 50:

The Bonapartenykus ultimus (“last claw of the paleontologist José Fernando Bonaparte”) came from the late Upper Cretaceous (Campanian, ca. 83.6–72.1 Ma) of western Gondwana (present-day Argentina). The only known specimen is a female that had two internal eggs called Arraigadoolithus patagonicus. Although it is not known precisely what their food source was, it has been suggested that some were either insectivores or omnivores. So it is not surprising that the largest alvarezsaurids were similar in size to today’s largest mammal insectivore, the yurumí (Myrmecophaga tridactyla), or giant anteater.

Many alvarezauroids are the smallest terrestrial theropods. Even the largest species do not stand out. Patagonykus puertai (“Patagonian claw, by Pablo Puerta”) from the early Upper Cretaceous and Achillesaurus manazzonei (“Achilles lizard of Rafael Manazzone”) from the late Upper Cretaceous, both from the western zone of Gondwana (present-day Argentina), were about 2.8 m long and weighed 30 kg. They were very close in size to Bonapartenykus ultimus, but it is unknown if they were adults. .

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

Dino Day: Giganotosaurus carolinii

Adapted from page 38:

The Giganotosaurus carolinii (“southern giant lizard of Rubén Carolini”)  lived during the late Upper Cretaceous (lower Cenomanian, ca. 100.5–93.9 Ma) in southwestern Gondwana (present-day Argentina). It was one of the largest predators of all time, as long as an urban bus, and weighing as much as an African elephant and a white rhinoceros together. The largest specimen is based on a very incomplete tooth that turns out to be 6.5% larger than that of the MUCPvCh1 type specimen. This individual would be as heavy as the largest specimen of Tyrannosaurus rex. Giganotosaurus was longer than Tyrannosaurus, but its body was less sturdy.

One of the largest theropods that left its imprints was a carcharodontosaurid (this group of dinosaur) from the early Upper Cretaceous of southwestern Gondwana (present day Brazil).

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

Dino Day: Sinosaurus shawanensis

All summer long, we’ll be highlighting different theropods from Dinosaur Facts and Figures: The Theropods and Other Dinosauriformes by Rubén Molina-Pérez and Asier Larramendi (with illustrations byAndrey Atuchin and Sante Mazzei).

This week’s entry is adapted from page 22:

A large vertebra from the Lower Jurassic (Hettangian, ca. 201.3–199.3 Ma) of northeastern Pangea (present-day China) was found among remains of sauropodomorphs and other mixed theropods. It may belong to a large specimen of “Dilophosaurussinensis, weighing more than a current hippopotamus. It was a dangerous predator, as it was not only big for its time but also quite agile, due to its slender build. The name “Sinosaurus shawanensis” appears on a list of fauna somewhere but was not formally named.

The longest theropod footprint from the Lower Jurassic may have been made by a species similar to Sinosaurus. It is different from the asymmetrical imprints left by megalosauroids. It was found in north-central Pangea (present-day Poland).

The smallest footprint of the Lower Jurassic belongs to a young coelophysid named the Grallator that lived in northwestern Pangea (present-day New Jersey).

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