Histosolocene: 0-24.3 MPE

Anatalia is the largest stretch of land on the surface of Anatina, as the planet's surface is about 78% water. The main landmass itself spans about 6,500 miles from the northern pole, Orcajaun, to the coasts of the Knarwel Pass. Anatalia is composed of several pieces of land, almost like a puzzle, starting at the north with Orcajaun. This landmass is the coldest place on Anatina, though it is not similar to the coldest places on Earth as Anatina is warmer by a significant margin. Orcajaun, and indeed any place on Anatina with the exception of very high peaks, does not experience permanent snow or snow all year round. Even in the north, snow is rare for most parts of the year, though it does fall from time to time.

Orcajaun sits on the Sydakan Plate, which is moving to the west, slowly but surely, creating a transform boundary that separates it from Perrusia to its southwest. This boundary is aptly named the Perrusorcan Vault. South of the vault is Perrusia itself, sitting on the Perrusian Plate. This continent is colliding into the rest of the mainland from the west, creating the tallest mountain ranges on Anatina, such as the Malanagongs. These are tall, mighty, and imposing mountains comparable to the Himalayas of Earth, and they are one of the very few and rare places with snow all year round. The tallest peak of the Malanagongs, called Perrus-Malana, reaches a height of 26,067 feet or 4.94 miles above sea level. The Malanagongs created a massive rainshadow that, over time, has resulted in a large cold desert bordered by arid steppes where large lifeforms are rare for the first half of the Histosolocene.

The Malanagongs are not the only large mountain ranges of Perrusia, as this continent is home to the second and third tallest peaks as well as the longest mountain range on Anatina. This mixture of mountains and high-elevation land has created a large, continent-wide alpine area called the Anatalian Highlands. For the first 10 million years of the Histosolocene, this land is devoid of larger animals that aren't invertebrates, but as the era progresses and the rest of the continent is filled, platypuses start to move in and fill the empty ecological niches of the Anatalian Highlands. Off the western shores of Perrusia is a long island called Ornittorinkos. This island, like many on the western side of Anatalia, is not colonized by platypuses during the Early Histosolocene because they were seeded on the eastern side, and ocean-going platypuses do not evolve until later in the era. Further east into the Anathalassic Ocean, you will eventually find Anataii, a cluster of three main islands and four smaller ones formed by the moving Anathalassa Plate over a hotspot. These islands are not colonized by vertebrates for over 40 million years.

Back on mainland Anatalia and over the Anatalian Highlands is the heart of the continent: The Great Knassian Delta System. Wet, marshy, hot, and fed by the rich and fresh Gunduwa River—a river 3,650 miles in length—the Great Knassian Delta System is the most productive place on Anatina. The formation of histosols in the soil, thick peat layers, and the sheer volume of decomposing plant matter provide a constant energy source for detritivores and plants, forming a high-energy and fertile foundation for the area. In addition, the Gunduwa River, which is the longest on the planet, flows down from the mineral-rich mountains of northern Anatalia and brings sources from around the continent into the Belugan Bay, which in turn feeds the Great Knassian Delta System.

To the north and south of this delta system are the Northern and Southern Anatalian Lowlands. The Northern Anatalian Lowlands are a vast stretch of land dominated by all sorts of grasslands, plains, steppes, and meadows. The climate and temperature are stable year-round and, because of the low elevation, many creeks, lakes, and small rivers are common. To the south are the Southern Anatalian Lowlands, which border the Great Knassian Delta System. If Anatalia were a country, the Delta System would be its capital and the Southern Lowlands would be its first-class area. This area is not as rich or diverse as the delta system, but it is still highly productive for its size. It is not as wet as the delta, but it is still warm and very moist, holding 10% of all land diversity throughout the Histosolocene, which is half the diversity found in the Great Knassian Delta System. Continuing south, you eventually meet the southern coast of Anatalia at the Knarwel Pass. Once you pass it, you reach Narwel Isle. It is warmer than Orcajaun and slightly bigger, but not much goes on there. Narwel Isle is just a large island that, for now, is effectively useless to the map.

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Platypus Speciation 

Billbadger: Rise of Rhynchodonts 

Great Knassian Delta System(GKDS)