Post by arethousleepy on May 18, 2019 19:18:58 GMT 5
Smilodon gracilis
Smilodon gracilis ("the slender Smilodon") was the smallest and earliest species of the genus Smilodon. It first appeared in the United States about 2.5 million years ago, probably a descendant of Megantereon, and lived until about 500,000 years ago. It lived mainly in the eastern regions of the Americas. Smilodon Gracilis ranged in weight from 120 to 220 lb (55 to 100 kg) and ranged in height from 39 to 47 inches (1 to 1.2 m). Their teeth are about 7 in. Smilodon gracilis was comparable in size to extant jaguars.
Dimetrodon grandis
Dimetrodon was a predatory synapsid genus that flourished during the Permian period, living between 280–265 million years ago (during the Artinskian to Capitanian stages). Dimetrodon had a high, arched, flat structure running along the length of its back. This feature is presumed to have been used by the animal for regulating body temperature, for example by absorbing the warmth of sunshine. Because the structure looked something like a ribbed sail, this kind of long-extinct creature is sometimes informally referred to as a "sail-back dimetrodon". Dimetrodon was one of the largest land animals and the apex predator of its time. Large dimetrodons ranged in length up to 400 centimetres (160 in) and weighed up to 250 kilograms (550 lb). Its diet could have included freshwater sharks, amphibians, reptiles and other amniotes. In particular, there is evidence the amphibian Eryops and freshwater shark Xenacanthus were its prey. Fossilized leg bones of Eryops and skulls of Xenacanthus were found to have teeth marks matching the shape of the teeth of Dimetrodon. Dimetrodon probably relied primarily on its sight and smell to hunt. D.grandis had denticle serrations similar to sharks and theropod dinosaurs, making its teeth even more specialized to slice through flesh.
Smilodon gracilis ("the slender Smilodon") was the smallest and earliest species of the genus Smilodon. It first appeared in the United States about 2.5 million years ago, probably a descendant of Megantereon, and lived until about 500,000 years ago. It lived mainly in the eastern regions of the Americas. Smilodon Gracilis ranged in weight from 120 to 220 lb (55 to 100 kg) and ranged in height from 39 to 47 inches (1 to 1.2 m). Their teeth are about 7 in. Smilodon gracilis was comparable in size to extant jaguars.
Dimetrodon grandis
Dimetrodon was a predatory synapsid genus that flourished during the Permian period, living between 280–265 million years ago (during the Artinskian to Capitanian stages). Dimetrodon had a high, arched, flat structure running along the length of its back. This feature is presumed to have been used by the animal for regulating body temperature, for example by absorbing the warmth of sunshine. Because the structure looked something like a ribbed sail, this kind of long-extinct creature is sometimes informally referred to as a "sail-back dimetrodon". Dimetrodon was one of the largest land animals and the apex predator of its time. Large dimetrodons ranged in length up to 400 centimetres (160 in) and weighed up to 250 kilograms (550 lb). Its diet could have included freshwater sharks, amphibians, reptiles and other amniotes. In particular, there is evidence the amphibian Eryops and freshwater shark Xenacanthus were its prey. Fossilized leg bones of Eryops and skulls of Xenacanthus were found to have teeth marks matching the shape of the teeth of Dimetrodon. Dimetrodon probably relied primarily on its sight and smell to hunt. D.grandis had denticle serrations similar to sharks and theropod dinosaurs, making its teeth even more specialized to slice through flesh.
