Hithered is one of my long-standing worldbuilding projects, with the likes of Mysenvar and The Argonaut Experiment. Mysenvar, The Argonaut Experiment, and Hithered all share the same origin.
Synopsis
The Dome was once a research facility—they were experimenting on the practicality of genetic modification to grant sapience—but in the aftermath of an extinction-level event it now houses what may be the last life in the world. The exact mechanisms of this genetic modification were unclear to the researchers, but it could only be passed down from father so son—except for in a select few groups of animals, whose sex-determination systems allowed for the genes to pass down effectively to female offspring.
Beneath the canopies of The Dome lies the Undergrowth, a world of brilliance and ingenuity.