Ecomorphology of the giant bear-dogs Amphicyon and Ischyrocyon

Article Abstract:

The study shows that the dental and skeletal morphology of the giant bear-dogs of the genera Amphicyon and Ischyrocyon, the largest carnivorans in North America match with the features of those found in living Ursidae, Canidae and Felidae. The analysis focuses on the diet and the hunting behavior of such bear-dogs and states that the dogs seized their preys powerfully with the muscled forelimbs and then killed them by tearing into its ribcage with canines set in a narrow rostrum.

United States, Behavior, Dogs, Canidae, Canids

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Ecomorphology of the giant short-faced bears Agriotherium and Arctodus

Article Abstract:

The study is conducted to test the hypothesis that the giant short-faced bears of the genera Agriotherium and Arctodus were primarily carnivorous and used to prey on several large terrestrial mammals. Even though the bears contain a large amount of animal food in their body, the comparison of their dental and skeletal morphology to that of Hemicyon Ursinus, an extinct carnivorous ursid supports and confirms their non-carnivorous instincts.

Physiological aspects, Prehistoric peoples, Fossil hominids

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Body size overlap, habitat partitioning and living space requirements of terrestrial vertebrate predators: implications for the Paleoecology of large

Article Abstract:

Ecological studies of extant tetrapod predators have proved that when morphologically similar species coexist in same habitats they reduce food competition by regular spacing of body size. The studies show that if Gorgosaurus and Daspletosaurus lived in the same region but different habitats, it is reflected by the different tooth type formation in contrasting sedimentary facies of Dinosaur Park formation.

Habitat (Ecology), Habitats, Vertebrates, Fossil, Fossil vertebrates

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