Ichthyostega stensioei is a species of extinct tetrapod that lived during the Devonian period

This replica represents Utahraptor ostrommaysi as a large North American dromaeosaurid with a robust build

similar a un pico parcial

These fossils provide invaluable information about the diversity and evolution of pterosaurs during the Late Jurassic

Hovasaurus boulei Embolotherium Ichthyostega stensioei is a speciesHovasaurus boulei was an extinct diapsid reptile from the Late Permian and possibly part of the Early Triassic , known primarily from its fossil remains in Madagascar , especially in the Dzulfian Sakamena Formation (approximately 252247 million years old) , which spans the Permian Triassic boundary. It is one of the most specialized representatives of the tangasaurids , a primitive group of sauropsids that adapted to an aquatic lifestyle shortly after