Atlanisian

Atlanisian is a term that appears in the fictional works of Edgar Rice Burroughs, specifically in his Pellucidar series. It refers to a civilization that existed in the ancient past, predating the surface world as described by Burroughs. The Atlanisians are depicted as a highly advanced race, possessing sophisticated technology and a deep understanding of science and engineering.

Their civilization is said to have been located on the continent of Atlantis, a mythical island that sunk beneath the sea. According to the lore, the Atlanisians were responsible for creating many of the wonders and mysteries that puzzled later inhabitants of Earth. Their downfall is often attributed to a cataclysmic event, which led to the destruction of their civilization and the sinking of their continent.

In Burroughs' stories, remnants of Atlanisian technology and architecture are sometimes discovered by the protagonists, providing glimpses into their former glory. These discoveries often play a crucial role in the plot, offering advanced tools or insights that aid the characters in their adventures. The Atlanisians serve as a backdrop for the incredible capabilities of a lost, advanced society, contributing to the sense of wonder and mystery in the Pellucidar universe.