Propus V

Propus V

## General Info:

Propus V is a forested planet with an earthlike climate and atmosphere, the planet harbours a massive ecosystem and is the homeplanet of the Plumasapiens, a sentient species. It has a bright-red colouration due to the higher luminosity of its home star (compared to our sun), which affects the colour of plantlife as a red colour absorbs the blue wavelength of light that the home star produces.

### Additional Features:

#### Long Years:

On Propus V, one orbit around its sun costs 5,45 earth years, or 1989 earth days, these years see three main seasons, summer, spring and fall. The planets' axial tilt isn't sizeable enough to support a full-on winter and snowfall only occurs in the lower latitudes.

#### Two moons:

Propus V possesses two moons, a large, arid one named Propulir and a smaller rocky one named Puqrus. Whilst Puqrus is too small to form substantial tides, Propulir, which is about 1.2 times the size of our moon, creates fairly large tides and allowed terrestrial life to appear through tide pools.

## Atmosphere:

### Special Features:

#### Sulphur Dioxide:

The fairly large amount of sulphur dioxide (So2) in the atmosphere allows for fairly efficient chemosynthesis (feeding on chemicals). The sulphur dioxide comes from the Karutoth Ultravolcano, and used to feed the first organisms of Propus V. The sulpur dioxide goes from the ocean into the atmosphere, where it ultimately lands inside the soil and can be taken up via plant roots. A specific group of Phytoformes named the Chemophytes is adapted to feed on the sulphur dioxide with large tentacular roots, because of this they dont require photosynthesis to survive. This allows them to thrive in low-light conditions, such as caves, the undergrowth and other dark places.

## Climate and Geography

### Continents:

#### **Plumica:**

Plumica is the largest continent of Propus V, its quite wide and spread across the equator, giving it a warm climate. Its surface is covered in large canyons, savannas and forests, and filled with wildlife, from the small Nanopteryx (Small-wing), to the deadly Dryptognathids (Wounding-jaw), and the gargantuan Brontotitans (Thundering-titan).

#### **Neo-Elerica:**

Neo-Elerica, the second largest continent of Propus V, lies for two-thirds within the south-pole circle, and is as such mostly covered in ice and snow. The remaining third is a forested taiga inhabited by hardy and robust creatures. An example of which is the highly adapted Cryotherium (Cold-beast), which grazes through the snow and digs up roots with its large tusks, its thick fur shielding it from the intense cold.

#### **South-Acheas:**

South Acheas is connected to North-Acheas via a tiny landbrindge, thesouther half of the continent is one massive desert due to it being sparsely connected to any wind-routes and thus to rain cloud, which lowers precipitation by more than 70%. The lack of water leads to its native life needing to find innovative ways to stay hydrated. The Northern half is covered in large open fields and blocked of from the other half by a gigantic wall of mountains which stretch from its western to its northeastern coasts.

#### **North-Acheas:**

North-acheas, the second smallest continent of Propus V is quite unlike its southern counterpart, it is also way smaller, only 0.4 times the size of South-Acheas. Despite its small size, North Acheas harbours the tallest point on Propus, Mount Thani, being 9428 Kilometres above the waters' surface. The southern and eastern side of the continent is blocked off by a single, gargantuan mountain range, making emigration to and from South-Acheas quite difficult.

#### **Pericana:**

Pericana is known as the 'Ruby Continent' due to its immaculate natural beauty, being the single smallest continent of Propus V and farthest away from any other continents, Pericana harbours a biosphere unlike any other. Being covered in jungles, mangroves and marshlands, Pericana is filled to the brim with colourful and diverse life. Some argue that its actually a subcontinent due to its small size, but most would list it as a normal continent.

### Oceans and seas:

#### The Pericanan Ocean:

Being the largest ocean on Propus V, the Pericanan ocean surrounds the entire continent of Pericana, and stretches all the way between Acheas and Plumica. Its the habitat of the largest creature on Propus V, the Sunspot Seafilter (Ceteotitan Pericananus).

#### The Neo-Elerican Sea:

The Neo-Elerican Sea is, to say the least, cold. It encircles Neo-Elerica and is the second largest ocean of Propus V. Icebergs are a common sight and the wildlife is unlike anything else on Propus V.

#### The Karutothan Ocean:

The second largest ocean, it lies in between Acheas' eastern coast and Plumicas' western tip. Right in the middle lies the crater of the Karutoth Ultravolcano. Under the 11.6 kilometer (7.2 mile) wide crater lies a spindly cave system that connects straight to the planets' mantle. This technically makes the cave system the deepest point on Propus V, but the official title is held by the bottom of the deep crater itself, at a depth of 12.7 kilometres (9.8 miles).

#### The Plumiterran Sea:

Basically one ginormous river stretching across more than 60% of Plumicas' width, its the life force of the inland savannas, forests and the kingdoms that the Plumasapients built around it.

## History:

### Formation + Early Existence(5.12 - 4.25 Bil. Years Ago):

Propus V formed around 5.12 billion years ago around a main sequence star named Baijar. In the early life of the planet it flew through much debris, which slowly formed two rings. These rings later condensed into two moons, an arid, dusty moon named Propulir and a smaller rocky one named Puqrus.

### Theroquan Age(4.25 Bil. - 1600 Mil. Years ago):

The first single-celled life formed during the Early Theroquan Age, likely around the Karutoth Ultravolcano. The planet was still uninhabitable and scorching hot on the surface but held life in the oceans.

### Maqiran Age(1600 - 900 Mil. Years ago):

The first Multicellular life appeared on Propus about 1200 Million years ago, during the early Maqiran Age. This was right after the first eruption of the Karutoth Ultravolcano, which wiped out more than two-thirds of all the single celled life. This eruption also literally created the second-largest landmass of Propus, Karuterra. The Maqiran Age also saw the formation of the main five clades of life, the Fungiformes, Phytoformes, Propodae, Coelodae and Eoformes. Around 920 million years ago the first terrestrial Fungiformes left the water, shortly followed by the plantlike Phytoformes.

### Abrinal Age(900 - 550 Mil. Years ago):

The Abrinal Age was the golden age for the oceans of Propus, the clades split off into many different groups and by 670 million years ago, the insectile Coelodae and jellyish Eoformes crawled out of the water and reign supreme on the land. The two continents, Elerica and Karuterra, were also about to merge into one supercontinent, with the Karutoth Ultravolcano right in the middle.

### The Terrestricene(550 - 430 Mil. Years Ago):

The collision of the two continents around 544 Million Years ago and the following formation of the supercontinent Gargantha, led to the Karutoth Supervolcano being sandwiched between two tectonic plates. This led to the second eruption of the volcano, which clouded the planet with ash for tens of thousands of years and led to the exctinction of 78% of all life, including the entirety of the unlucky Eoformes except for a single clade known as the Eodermids. The rest of the Terrestricene saw the first vertebrate land animals in the form of the Terrestricanthids, a large-spectrum group which harbours all terrestrial vertebrates. These Terrestricanthids and to an extent, the Tetragnathids, took all possible niches and outcompeted the invertebrate Coeloformes due to their skeleton and lung (yes, just one), much like on earth.

### The Taerocene(430 - 350 Mil. Years Ago):

A mountain range forms where the two continents merged, covering the Ultravolcano under miles of mountains where it would build up a massive force. The Terrestricanthids spread all across the continent and adapted into many different forms.

### The Thanatocene(350 - 230 Mil. Years Ago):

The Thanatocene (which gains its name from the greek word for death, Thanatos) was a dark time for the life on Propus V, the Ultravolcano, which had been swelling up under the Garganthan mountains for 361 million years, erupted, resulting in a chain of Super-Eruptions that led to an ice age lasting for multiple millions of years, and a full 29.8 percent of the planets' surface being covered in a 30 cm (0.98 ft) layer of ash and dust plus the extinction of 99.2 percent of all life. There's are reason this age is called the Ashen Age or the Age of Death. On the bright side, the layer of ash preserved fossils very well and allowed for a detailed look into the ecosystem before the eruption. The ash was also very fertile for both the Photoformes and especially the chemosynthetic Chemophytes, and 67 million years after the eruption, most signs of the catastrophe were wiped away. The supercontinent was also on the verge of shattering.

### The Neoprotocene(230 - 180 Mil. Years Ago):

The Neoprotocene was a fresh new beginning for life, one of the few surviving Terrestricanthid clades, the Cephalobrachids (Head-Arms), quickly rose to a dominant state, not because they were necessarily better than their competition, but because there w*asn't* any competition left. The Thanatocene killed most of the Terrestricanthids, and they, together with the Massopods (Bulky-Legs), and Iguanocanthids (Iguana-spine), and some other small, generalist groups, would once again spread across Gargantha only 40.000 years before it would begin breaking apart into five continents, Plumica, Neo-Elerica, North and South Acheas and Pericana.

### The Aureocene(180 - 18 Mil. Years Ago):

A time of great ecological diversity and splendor, each continent takes on its own climate and biosphere. Plumica is closest to the equator and is also the largest landmass at the time. It is covered in savannas and jungles and harbours a diverse paradise of animals, from the small, burrowing Stenolithus (Narrow-stone) to the giant, grazing Brontotitan (Thundering-titan) and the 130 metre (426.5 ft) tall, tree-like Titanophytes. Neo-Elerica began moving southward, and would very slowly be consumed by the southern arctic, cooling down the further it moved south. North Acheas would be connected to South Acheas by a tiny land bridge, North Acheas had a cold climate, covered in taigas and tundras by the nearly . On the other hand, South Acheas was nearly one arid desert, except for near the western coast, where it harboured a biosphere unlike any other on Propus, that being a massive mountain range left over from the Garganthan mountains, the rocky glaciers make for interesting evolutionary adaptations to the flora and fauna of this place. Lastly, Pericana is truly a paradise, one massive jungle, it holds a truly magnificent biosphere, full of plants, animals and fungi.

### The Alpacene(18 - 11 Mil. Years Ago):

The early ancestors of the Plumasapiens, the Plumasimians (Plume-apes) appear in east Plumica, adapted for living in the trees, they possess three strong fingers and a thin coat of fur. On nearly the other side of the planet, the landbridge between North and South Acheas is temporarily broken, allowing the two biotopes to differentiate from each other.

### The Cryocene(11 - 8 Mil. Years Ago):

The world enters a long ice age, leading to the exctinction of a few species and creating a bunch of landbridges between the continents, briefly creating a spindly supercontinent, although most would argue wether that matches the true definition of a supercontinent. however, these landbridges do allow for some exchange between species, Neo-Elerica is the only one to not exchange species, and Pericana only very few with Plumica, among these few is a species of Plumasimian which will later become the Aureosimians and the Mellirostrids.

### The Neocene(8 - 2 Mil. Years Ago):

At the end of the Cryocene, fairly little has changed, a few species had gone extinct both from the cold and being outcompeted by species from other, more hazardous continents. Though apart from that, the world remained fairly unchanged. The first species of Plumasapiens were appearing, P. Bartii, P. Deus and P. Kaprus. P. Bartii is the direct ancestor to the Plumasapiens that currently inhabits Propus, P. Modernii.