Here's the shared world of of the Niscals, Jellienians and other sapient (non-human) creatures.
Niscaliawana is a different world.
There are no humans but sapient monitor lizards called the Niscals and their contemporaries, the Jellienians.
Africa and Europe is mostly uninhabited by the Niscals, the Jellienians' land, Jelliena was connected to Asia, Australia, The Americas and some to extent, New Zealand, many Pafifc islands, Madagascar and India.
This connection made the native fauna of Jelliena to become more widespread and the world's climate and geography was changed. Many species mostly varanids, marsupials, monotremes, prosimians, bats and rodents are much more widespread since the dry/wet climate displaced many of the placental and saurian animals in many areas (though they survive too, though in more suitable areas)
In JelliaNiscaland (Jelliena, Asia, Australia, Americas), it's mostly subtropical with rainforests and savannas. In Afriarope (Africa and Europe), it's dryer and colder.
The Bering Land Bridge reestablished itself with the Jellienian species migrating north.
Madagascar and India are connected to JelliaNiscaland, considering that those two areas are territories to both the Jellienians and Niscals, the dominate sapient forces.
The cold-loving species of Jelliena migrated to the Arctic and Antarctica and to some extent, Afriarope, since the Jellienian ice cap melted.
Mt. Rosalan, the highest mountain of the world moved herself to the top of the Arctic.