New PDF release: Last of the Dinosaurs: The Cretaceous Period (The

By Thom Holmes

ISBN-10: 0816059624

ISBN-13: 9780816059621

Within the Early and overdue Cretaceous sessions, altering geological and ecological stipulations created possibilities for the growth of dinosaurs. those all over the world geologic and weather shifts of the Cretaceous interval allowed for the evolution of Saurischian - lizard-hipped - dinosaurs and Ornithischian - bird-hipped - dinosaurs, together with a number of households that seemed for the 1st time in this span. although, those related ecological adjustments additionally contributed to the eventual extinction of dinosaurs huge and small. "Last of the Dinosaurs" explores the theories for what could have triggered the mass extinction that ended the reign of the dinosaurs and plenty of different terrestrial and marine creatures of the time. The non-dinosaurian reptiles of the Mesozoic period also are tested.

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Extra resources for Last of the Dinosaurs: The Cretaceous Period (The Prehistoric Earth)

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Indd 35 10/13/08 2:59:35 PM 36 LAST OF THE DINOSAURS Sauropods are divided into several subgroups, as shown in the accompanying figure depicting the evolutionary relationships of the Sauropodomorpha. Of these sauropod groups, only the Neosauropoda definitely had subgroups that survived into the Cretaceous Period. The basal Sauropoda—including the most primitive sauropods, such as Blikanasaurus (Late Triassic, South Africa) and Vulcanodon (Early Jurassic, Zimbabwe)—lived during the Late Triassic and Early Jurassic.

The skulls of titanosaurs have rarely been found, although a few fine examples have recently been unearthed. In Argentina, paleontologist Rubén Martínez recovered an isolated titanosaur skull and neck from the earliest Late Cretaceous badlands of Chubut Province in central Patagonia. Around the same time, in 2001, American paleontologists Kristina Curry Rogers and Catherine A. Forster described a remarkably complete skeleton and skulls of a medium-sized titanosaur from the Late Cretaceous of Madagascar that they named Rapetosaurus (“mischievous giant lizard”), after a figure from Malagasy folklore.

In Argentina, paleontologist Rubén Martínez recovered an isolated titanosaur skull and neck from the earliest Late Cretaceous badlands of Chubut Province in central Patagonia. Around the same time, in 2001, American paleontologists Kristina Curry Rogers and Catherine A. Forster described a remarkably complete skeleton and skulls of a medium-sized titanosaur from the Late Cretaceous of Madagascar that they named Rapetosaurus (“mischievous giant lizard”), after a figure from Malagasy folklore. The best-known specimen of Rapetosaurus is a juvenile that measured about 30 feet (9 m) long.

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Last of the Dinosaurs: The Cretaceous Period (The Prehistoric Earth) by Thom Holmes


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