Saurosapient (All Tomorrows)

The Saurosapients were a sapient species that evolved from the livestock of the Lizard Herders, while the Herders themselves stayed non-sapient.

Like the planet of the Ruin Haunters, their world was littered with the ruins of the Star People and Qu. While they were seen as natural formations by the earlier Saurosapients, later generations found out what they really were, learned from their writings and adopted the cultural identity as "humans".

Through the ruins, they also learned that their pets and mounts are the biological descendants of the Star People and about their fate at the hands of the Qu. Some Saurosapients developed religions based on this premise, turning to gods to protect them from the forces from outside their planet. Others built on conservatism, while a third fraction decided to develop their technology further, even while there was such a powerful force that could potentially destroy them for this.

An ancestor of the Saurosapients.

After centuries of wars, the progressive fractions won and expanded their spheres of knowledge, influence and activity. After they developed radio communications, they belonged to the third wave of posthumans joining the Second Galactic Empire founded by the Killer Folk and the Satyriacs.

Over a timespan of about 80 million years, the Second Empire developed, through the combined effort of all members, into a galaxy-spanning empire, even though the members never met each other personally, and all of the species colonized other planets.

Though they were prepared to face an alien invasion, the Empire didn't think about an invasion from other posthumans, and so the Saurosapients, along with all of their cousins, were quickly wiped out by the Gravital as part of their interstellar conquest.

Source: WikiFandom