Gazelle : The Palestinian Biological Bulletin (ISSN 0178 – 6288) . Number 120, December 2014, pp. 1-29. | Page 15

15 Prof. Dr. Sc. Norman Ali Bassam Khalaf-von Jaffa and his daughter Nora Norman Ali Khalaf infront of the Long-necked whip-tailed Sauropod Dinosaur (Amphicoelias brontodiplodocus Galiano and Albersdörfer, 2010) skeleton at Dubai Mall, Dubai, UAE. The skeleton is over 155 million years old and is 24.4 meters long and 7.6 meter high. It was discovered in 2008 at the Dana Quarry in Wyoming, USA. 08.04.2014. https://www.flickr.com/photos/50022881@N00/13862470044/ Paleobiology In his 2006 re-evaluation, Carpenter examined the paleobiology of giant sauropods, including Amphicoelias, and addresses the question of why this group attained such a huge size. He pointed out that gigantic sizes were reached early in sauropod evolution, with very large sized species present as early as the late Triassic Period, and concluded that whatever evolutionary pressure caused large size was present from the early origins of the group. Carpenter cited several studies of giant mammalian herbivores, such as elephants and rhinoceros, which showed that larger size in plant-eating animals leads to greater efficiency in digesting food. Since larger animals have longer digestive systems, food is kept in digestion for significantly longer periods of time, allowing large animals to survive on lower-quality food sources. This is especially true of animals with a large number of 'fermentation chambers' along the intestine which allow microbes to accumulate and ferment plant material, aiding digestion (Wikipedia). Gazelle : The Palestinian Biological Bulletin – Number 120 – December 2014