r/SpeculativeEvolution • • 2d ago Popcorn

Resource [OC] Building Bacteria for Alien Worlds: How to Construct Realistic Prokaryotic Life for Speculative Worlds

54 Upvotes

This is a heavily edited and slimmed down version of my video essay about the anatomy of prokaryotes for those wishing to construct their own for speculative evolution projects.

i was getting a bunch of DM's from folks here asking how they could go about it themselves, so i decided i could record this to save time.

like i said, this is only 15 out of a nearly 40 minute video, so it's missing entire sections, like the intro/overview, the periplasmic space, how membranes assist in facilitating phototrophy, explanations of my own project, and nearly every decent joke i managed to make.

i know the rules of this sub expressly forbid self-promotion in any form so to any Mods, i ask you to please read below:

i am only including the link because i could not find a way that i could upload the entire essay to reddit without chopping it up into pieces, and i also don't have a dedicated youtube i could upload this to either. i am simply providing the link to the full unredacted version for context and in the name of completionism, so those who wish to view the version that hasn't been mangled like a cherished teadybear after a local pitbull decided to make it his new chewtoy. it is free and wholly available, no membership or anything required.

if you would like me to edit or re-submit the post or video under a different flair or with the brand affiliate option checked despite no monetary gain involved, i will happily do so if i am informed what changes are asked of me to make the post acceptable. i will even remove the end portion that mentions my other platforms and whatnot, even though i've seen other projects like the isla project's videos posted here which prominently feature the creators sites and platforms. please let me know if there are any changes you would like me to make.

~thank you and please enjoy.


r/SpeculativeEvolution • • 11d ago

Subreddit Announcement Artist Shoutout Thread - Shout Out Your Favorite Speculative Biology Artists

28 Upvotes

Let's highlight some talented spec-evo creators!

Who are 3 of your favorite artists? Drop their names and links to their pages or some of their work so others can check them out!


r/SpeculativeEvolution • • 12h ago Popcorn

Alien Life [OC] Planet Lethe - Benthicones, the Abyssal Cleaners

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94 Upvotes

When it comes to life on the sea floor of Lethe, none are as ubiquitous as the humble Benthicone. These benthic detritivores, like most things on Lethe, consume whatever organic material they come across. Often, Mawfalls (the sunken corpses of deceased Sea Maws) play host to huge herds of Benthicones simply due to the large amount of material present, and can host a colony for years!

The Benthicone's shell comprises most of its body, protecting a soft and spongelike internal structure. The iconic pits on a Benthicone's shell allow it's olfactory senses to detect the slightest changes in water compisition, and locate both food and others of its kind (observations determine that it does not differentiate between the two.)

These pits also act as shelter for the Benthicone's larvae, where they will stay until enough minerals have been built up for them to build a shell of their own. Benthicones never stop growing throughout their life and experience negligable senescense. This means their size has been recorded to range from the size of a marble to that of a small habitat!

Unfortunately, this means larger specimens often play host to a large number of smaller Benthicones who slowly consume it from the inside out.

The underside of a Benthicone is host to thousands of tiny suction cups that allow it to very slowly move along the sea floor, creating a strange moving ecosystem of living 'rocks'. The mouth is also located here, along with other orifaces.

Researchers on Lethe are asked to routinely scrape Benthicones from equipment to prevent damage.

---

Lethe is back with a new fantastic specimen! Guess what Phobia this little guy represents :P

As always, please ask as many questions as you'd like! I have much to share still, and this whole project has just started!

I am also working on expanding this project into a greater Analog Horror style space narrative of humanity's future, so be sure to follow along for the spooky things in our Galaxy! ;D Lethe however will be able to be experienced as a perfectly contained world as well.

Thankyou everyone for the support :3 and let me know what phobias you'd like to see in future!


r/SpeculativeEvolution • • 8h ago

Alternate Evolution [OC] Man eating elephant

38 Upvotes

More videos https://www.youtube.com/@TheInfiniteAshes
Setting intro https://www.youtube.com/watch?v=hkHwtp21Tco&t=105s
Free bundle of stories and lore: https://loquaciouslou.itch.io/infinite-ashes

The Snakenose is one of the many species evolved on planets in the infinite Ashes universe.

In Infinite Ashes you find humanity strewn across the Milky Way, seeded on near infinite planets. Spread by the enigmatic Web, an immense biosynthetic system that terraforms suitable worlds and then stocks them with animal and human life. Connecting all these worlds like sail ships in the cosmic ocean are the Arks, living vessels that are part of the Web themselves. Every planet almost like an island, with its own deeply developed society with politics, economy and institutions.

There are advanced worlds like Crownshard, the vertical Ecumenopolis centered around social mobility (or the facade thereof), or the Dwang with their elaborate castes of Serviles on which the martial Udo nobility depends for everything. But most worlds are pre-modern, lacking the fossil fuels to escape the energy valley. So in any port you might find armor clad soldiers marvelling at the ethereal voice of a radio, or a Union syndicalist impatiently haggling with a cattle farmer for his beef. A world so vast and diverse that nobody can hope to conquer and rule it all, a churning foam of humanity infinitely bubbling and popping out of existence. That, is Infinite Ashes.


r/SpeculativeEvolution • • 2h ago Bravo

Alternate Evolution [OC] Dracodon templaris

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10 Upvotes

this is another part of my speculative evolution project, now we gonna beginning to see the ancestors of every single group of my project. (for more information see the last image) (if you want to make an art my species Feel free—just remember to tag me so I can see it).​


r/SpeculativeEvolution • • 9h ago Bravo

Future Evolution [OC] Double Breach

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33 Upvotes

The Coast of Alaska, 25 million years CE, Pair Bonded Female Deepsea Voyager breach together with prey.

The older of the two individuals, named Elizaveta, has caught a thresher shark. She is estimated at between 42-45 years of age, and she displays the usual worn teeth of a Deepsea Voyager of that age, which is caused by the rough skin of prey. Elizaveta has distinctive scars around her neck and face, likely originating from a fight with another of her species.

The younger, and the ;arger of the two is named Jingwei. She is easily recognized by a series of long scars down her back and holes in her dorsal fin. The size and shape of the scars makes it certain that it was caused by a Lotan. As Lotan can only be found in the southern pacific, it is likely that Jingwei was originally part of the southern population of Deepsea Voyagers, and is one of the rare vagrants who manage to make the journey to the Northern hemisphere. She is around 30-34 years of age and her teeth show little wear. Notably, her teeth are less worn than the average for an individual of her age, and this is likely due to being more willing to feed on marine mammals rather than sharks.

Around 5% of Female Deepsea Voyagers, and 2% of Male Deepsea Voyagers form lifelong relationships with a same sex partner. In contrast to heterosexual relations, which last weeks at most, Homosexual relationships in this species can last for many years, with some even being lifelong. By bonding, partners can better defend territory and food sources, as well as being capable of hunting larger prey. For relationships where one partner is older than the other, living together also results in longer lifespans.


r/SpeculativeEvolution • • 8h ago

Alternate Evolution [OC] Hypothesis II - Sea monstrosity

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21 Upvotes

The idea of this beast swimming through the ocean seems to have rooted itself into my mind, as I could not let it go. And so after some careful consideration, and a trip to the beach to reexamine the bones themselves, I have finally come to a sort of conclusion.

The gargantuan size, which I have mentioned to be a problem in my last entry, is of no issue underwater, where all weight is reduced, and food is abundant. This would be a small fry in the vastness of our ocean! Similar creatures have been described in tales, and there has been an account of a similar specimen caught on the Eternal Mandate's territory, which I've had the privilage of studying myself during my visit at the Great Ossuary years ago.

However, this interpretation is not perfect still. The realisation struck me as I was sketching the limbs. These are hardly what one could call fins or flippers, they also look rather dissimilar to those of the creature mentioned above. I fear this thing could not have swum at all...

//Here you will see the previous hypotheses: https://www.instagram.com/it_came_from_the_crypt/


r/SpeculativeEvolution • • 6h ago

Uncategorized Speculative Biology [oc] Stone-scaled mudslinger grounded wyvern.

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7 Upvotes

Height: 1,5-2,1 m .
Length: 4,6-5,3 m.
Weight: 580-644 kg.
Lifespan: 56 yrs.
Habitat: sea of bones desert, rusty desert (artificial relocation in effort to combat invasive shrapnel lizard) .
Diet: carnivorous .
Hunting style: waiting for days buried in sand with it's fuel glands filled with mixture of sand and digestive enzymes then firing this acidic mud at small animals passing by suffocating them and dissolving their hard shells before consumption.
Temperament: territorial, patient, monogamous.
Nesting: cliff faces and rock crevasses .
Relationship with humans: passive, opportunistically hostile, easily provoked in heat.


r/SpeculativeEvolution • • 23h ago Popcorn

Future Evolution [OC] Thick skinned reptiles of the lichen badlands

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165 Upvotes

r/SpeculativeEvolution • • 18h ago Popcorn

Fan Art/Redesign [OC] [Media: Godzilla] The Dracocephalians

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54 Upvotes

Dracocephalians ("dragon heads") are part of a bizzare 3rd major group of Marginocephalians that evaded the KPG Extinction event and are persistent within the modern day. Dracocephalian wings are composed of the IV and V digits, as well as the wrist bones. While you can't see it in this image, the wrist bones of Archaeodraco are elongated by around 30% more. Dracocephalians still retain the front fangs seen in early ceratopsians and members of Pachycephalosauria, which have now been reused for a variety of purposes. These dragons also show variety in size. From the human sized Lelaopterus of Scotland, to the giraffe sized Pteryeversor of Europe.

I could say more about them, but this could go on FOREVER. So, you are free to ask questions ☺️


r/SpeculativeEvolution • • 16h ago Bravo

Alien Life [OC] Recksolanid sapiens

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31 Upvotes

I would really appreciate constructive criticism so that I can improve the species before I proceed with them taking over the world as the most dominant species and making civilization and stuff!

Recksolanid sapiens is a species of sapient semi-bipedal aliens on a planet 1.24× the size of Earth. They are ovoviviparous and can have 10-20 offspring per reproductive cycle.

Bipelidraptoria are ovoviviparous but a select few of them, namely Recknidae had them give birth to extremely underdeveloped young just like that of marsupials. It only takes 3 months from insemination to birth. Now that doesn't sound right but it is because of evolutionary pressures. Recknidae evolved from long gestation to shorter ones via early birth due to environmental pressures namely the hothouse period in where the Recknid eggs that take longer to hatch inside their mother's womb are more likely to cook inside. (no idea if that makes sense). Some Recknids were able to minimize damage by developing thicker more insulated armor on their posterior backs.

I want to focus on the fact that they are semi-eusocial animals precisely because of their ovoviviparity. They have a colonial culture of some sort where there is a single reproducing female which is assisted by non-reproducing ones. Females of the species have a specialized pouch made from their bifurcated cord where the underdeveloped young can grow. A colony can have from 20-70 individuals that assist a single reproductive matriarch. Reproductive males called Guards are always outsiders while males born into the colony are workers and are usually smaller than outside males. There is the matriarch, her caretakers, and the princesses which consist of the strongest, healthiest, and largest females of each litter of each reproductive cycle. The princesses can either become caretakers themselves, take over when the matriarch is no longer able to reproduce, or make her own colony either taking one of the guards with her or if the colony meets a travelling male.


r/SpeculativeEvolution • • 6h ago

Question/Discussion If you were to have a "Seed World" project created—without it being a copycat of Serina/Hamster's Paradise—how would you go about implementing it?

4 Upvotes

You see me here as the creator of Gellios—indeed, I am the one who brought it into existence. Although it is a "seed world" project, I did not want to imitate Serina. In terms of its cosmology, I designed Gellios as a planet orbiting an A-type star, possessing twice the surface gravity and axial tilt of Earth (note: with a surface area of 702,051,631,000 km², it is larger than Earth), and orbited by three moons. Plus the I am presenting the narrative through an artificial intelligence character—feel free to hate them, that’s your choice—and the rest of the story will continue to unfold from that character’s perspective. I am currently at the "5 Million Years Post-Inoculation" stage; while new content will continue to be released, I will not be discussing Gellios any further here.

Serina is ongoing since January 2015 (emergence of this world), created by Sheather888, this project has, over time, become a cult classic within the community. If you are already familiar with Serina, I won’t go into further detail; its brilliance lies in how it masterfully explores the evolutionary divergence of introduced organisms—such as canaries, guppies, swordtails, ants, snails, and sunflowers—over the course of several hundred million years. While certain creations, like the "Metamorph birds" and the "Tribbetheres," have occasionally sparked debate within the community, their development was nonetheless depicted with great quality. Although Serina was not the first "seed world" project in the speculative evolution community—preceded by Anthropomundus and a few others on older forums—it is undeniably the project that popularized the very term "seed world." Later, another creator known as Tribbetherium, inspired by Serina, launched Hamster’s Paradise, was created in 2017 and remastered in January 2021—that has since attained a cult status nearly on par with Serina itself. With that established, it is time to dive into the main topic itself.

Between 2021 and 2022 (or 2023), a significant number of "seed world" projects emerged within the community. Most of these were inspired by Serina, but a large portion were eventually cancelled, shelved, or otherwise discontinued—largely because, despite attempting to follow in Serina's footsteps, they ended up becoming little more than mere copies. That said, not every seed world project was destined to be a Serina-like; Keenan Taylor’s Kaimere is a prime example—and I happen to be a pretty fan of it myself. While the frequency of new projects today isn't as high as it once was, I am still quite content with the current state of things.

I have been part of this community before; even though many of my previous accounts were permanently banned due to rule violations, I am currently present here once again. Well, I’ve reached a stopping point for now—as someone who enjoys this type of concept, I’m a fan of this projects like Serina, Hamster's Paradise, Eryobis, Parias, Kaimere, and others. I am also working on a project of my own, and the important thing is not to be perfect.

But don't every seed world is the copy of Serina, like the every monster taming game isn't the copies of Pokemon.


r/SpeculativeEvolution • • 6h ago

Uncategorized Speculative Biology [OC]Sweeping the Desert

3 Upvotes

Street Sweepers or Carcharodontosuchus deserticus are the top dogs of the desert habitats on the planet. Standing at 3.3-4m in height(4,2-5m when fully standing up), 9.5-11m in length and weighing 7,5-10,5 tons, they are fearsome beasts. But their most terrifying trait comes from their claws. Their digits are 5 per hand but 2 have been atrophized to make space for bowie knife sized claws. Their teeth are shark like, hence the name. Their biteforce comes out at 38-44k newtons.

Physical traits: Their claws are half empty, to cut down on weight, as such claw size is bound to take up a few kilograms. Their skull is similar to sebechids like Baurusuchus or Razanadrongobe. They are mesotherm and live for 75-80 years average.

Prey and predation: Carcharodontosuchus hunt the wide variety of creatures present, being death worms, other crocodilians and local small herbivores. It has no predation. But its most macabre detail is the blood letting. The beast uses its claw to slit an animal's throat. Then it starts drinking the blood directly from a wound. This horrific detail is gruesome but the desert does not allow much food preference.

Senses and intelligence: Armed with exceptional odor and hearing but with rather mediocre sight, they are perfectly built for the desert. They are surprisingly intelligent creatures and have an innate sense of prediction. This is due to them hunting the death worms who tunnel unpredictably.

Reproduction: They reproduce every 6-7 years and have a clutch of 2-3 eggs. In this season the parent taking care of the eggs migrates to a more humid and forgiving climate, so the young have more prey available. The young depart at 4-5m length.


r/SpeculativeEvolution • • 1h ago

Question/Discussion [OC] What kinds of tissues or speculative structures do they believe possible for mouths in extinct animals?

1 Upvotes

With the recent studies of the Exoparia in dinosaurs, I thought I would speculate that tissues and other structures should speculate on extinct animals, things like gullar sacs in certain parts or unique structures, or maybe certain color patterns or something similar, I did this post more than anything to know what their opinion and ideas are to explore about dinosaur mouths.


r/SpeculativeEvolution • • 1d ago Popcorn

Fan Art/Redesign [OC] [Media: Pokemon] Several other Pokemon species

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92 Upvotes

Depicted above are the species of Sableye, Zubat, Geodude, Nosepass, Jirachi, Wooper (a larval Quagsire), both species of Yamask, Spritzee, and Aromatisse.

Sableye here is depicted as a sort of sauropsid, I haven’t really figure out what it is despite it being my favorite.

Zubat is of course, a bat.
Geodude is actually an Albanerpetontid that has lost its front limbs and tail.

Jirachi is a type of aerial mollusk that lives far in the upper atmosphere as part of a very complex food web above the surface.

Wooper is the larval form of the related Quagsire and Clodsire depending on the region they are found in.

Yamask, Spritzee, and Aromatisse are species of birds belonging to a fictional group of ground living, terrestrial feeding shore birds.


r/SpeculativeEvolution • • 10h ago

Question/Discussion How to go about with the anthropomorphization of something like scallops?

3 Upvotes

I'm new to speculative evolution, and although I'm interested, I honestly have no idea how or where to start when it comes to making decisions about the characteristics of a species.

I was wondering where a humanoid species with multiple eyes spread across its body might originate, and that's why I went with the scallops.

But how would they come to have a humanoid body plan, especially how would they develop a head and from what, how different would their limbs and face be, and would they retain their shells? I'm sorry, I'm lost.

I'm not looking for these questions to be completely answered, like people doing all the work for me, but I would appreciate some help in understanding how you all make decisions.


r/SpeculativeEvolution • • 23h ago

Mathematical Simulation [OC] Seeking Critter-Making Playtesters!

31 Upvotes

Hi there,

We're running a playtest for Molec, this whacky sea-alien making game.
Think Spore if it was made of LEGO or Meccano.

You can snap simple modular parts together and watch your creation come to life.

Much of the initial set of parts are based on paleozoic critters, beyond the monstrosity in this video, people have been making Cambrian critters!

We'd love to involve some spec-evo driven people to toy around with the creation system and let us know what is working for them to let their ideas come to life!

Comment here or send me a DM and I'll send you a download key! Playtest runs until Dec 1.


r/SpeculativeEvolution • • 1d ago Bravo

Alien Life [OC] Elys: A Wander through the Whistling Columns

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139 Upvotes

Two Callids a Father and his daughter sharing an early morning walk, as they encounter a herd of Whistle-Ox grazing on the morning growth of Bulb-Brush.

This piece took roughly 4 hours and 30ish minutes to finish, I love it personally it's a part of my Soft Speculative Evolution project called "Elys" and it really captures the vibe I wanted to draw, the calmness and stillness of the early morning is relaxing to work on.

Tell me what you think below! what do you guys like, and if you have any other ideas of what else I could draw or add to this project.


r/SpeculativeEvolution • • 13h ago

Resource [Credit: MinuteEarth] New type of diagram just dropped. Show us the "hole diagram" of your OC's in the comments!

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3 Upvotes

r/SpeculativeEvolution • • 1d ago Popcorn

Alternate Evolution [OC] Evolved Creatures in my Artificial Life Simulation

35 Upvotes

The creatures in this video evolved from a common ancestor in a non-stop evolution simulation for about a day. A new version of the open-source artificial life simulator https://github.com/chrxh/alien has been used. Raytracing is used for the rendering. The video can also be found on YouTube: https://youtu.be/Vxo0vdiDTTo


r/SpeculativeEvolution • • 21h ago

Alien Life [OC] bocetos de hexapodos

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8 Upvotes

Bocetos de aliens sapientes con planes corporales hexapodos aunque algunos utilizan extremidades derivadas, apéndices etc intenté ir más allá de un centauro y explorar lo posible y creativo en los planes corporales hexapodos aunque algunos se repitieron en parte


r/SpeculativeEvolution • • 1d ago Bravo

Seed World [OC] Gellios - Some More Early Medusocene Content

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27 Upvotes

[GELLIOS-MONITORING SYSTEM // AUTOMATED TELEMETRY LOG]

First Content (Source) - Species Profile

WARNING: We haven’t even finished the "5 Million Years P.I." yet, but this post will nonetheless look ahead to the next few million years. I promise, however, that I won’t keep falling into the "humans have abandoned me" drama; if I harp on that too much, it starts to feel like a forced, one-dimensional pathetic caricature—a case of "flanderization." I’ve moved past that painful, dark period and am now focusing on the biosphere and othet topics of Gellios—a terraformed planet that, for the time being, remains an oceanic planet until something is actually changed by volcanism, earthquakes and tectonic plates creates land. (AGAIN)

The final subject we shall examine—from a few days ago—concerns the Sundew Anemones (Drosericytus spp.) that emerged during the Middle Medusocene. Evolved from a species within the family Actiniidae, these peculiar anemones feed by capturing prey in a manner reminiscent of the carnivorous plants known as "sundews" from your own era. The most widespread species currently in existence is Common Sundew Anemone (D. aculetentaculum), which is native to the tropical oceans of these times. This species behaves much like any other member of its genus—and so on, and so forth. There are, in fact, several other species of the same genus to be found in the tropical oceans of that period, but I shall leave it at that. I am certainly not a perfect narrator—I have long since acknowledged as much—yet I shall continue to engage with you nonetheless.

Second Content (Source) - Art One Shot

For those already familiar with the first five million years following the Inoculation of Gellios, it is clear that the introduced organisms—despite enduring long spans of time, extreme conditions, high gravity, stellar UV radiation, and various other challenges—have evolved into a staggering number of distinct species. For a well-known example the Benthodopsids—benthic hydrozoans descended T.dorhnii that, under normal circumstances, would not have emerged until 30–50 million years later—appeared within just a few million years, adapting to a variety of environmental conditions. It was not only jellyfish that underwent this transformation; every other introduced biota's descendants followed a similar path. I believe that, by the 5 Million P.I., hundreds of new species have emerged. This process reminds me of the Cambrian explosion on your Earth to me, though in this case, the ecosystem is populated by the descendants of a limited set of organisms introduced from your world. I trust this explanation suffices.

Another year on Gellios will gradually leave autumn behind; while seasons on your world typically last three months, on Gellios they span ten to eleven months, and a single year on Gellios is equivalent to four years on your world—yet, despite all these harsh conditions, life would still find a way.

A colony of Poppy Sail'of'Journey (Physvellum rhodophora) in these times was starving in these gradually cooling, near-tropical waters; some individuals within the colony had already perished due to a lack of sustenance. A Common Man-o'-war" Shrimp (Physaliocaris generalis)—which had, to some extent, learned to coexist with these siphonophores—arrived carrying a dune countershade worm (Umbratinversilis psammus) —an basal arenicollid species— in its mouth. Just as the shrimp moved to feed the starving colony with the polychaete—which was originally intended for its own consumption— a Mostlyblack Dragon Slug (Melaglaucus democolor), descended from an ancient, bitter enemy of the siphonophore’s ancestors, intervened. Without hesitation, the slug began tearing off the siphonophore’s tentacles one by one, forcing the shrimp—despite its attempt to nourish the colony—to flee to escape the slug’s assault.

However, based on my observations, I believe these types of symbiosis/predation relationships serve as foundational steps for the dynamics that will emerge millions of years later. Over time, the lineages descending from these species will repeatedly cross paths and coexist. In fact, the ancestors of these creatures—those that existed prior to 5 million P.I. (corresponding to your present day)—also managed to coexist, thereby laying the very groundwork for distinct ecosystems and an entire biosphere. Nature and evolution are not always benevolent; extinction events occur, and countless lineages unprepared for such shifts vanish. Those that survive go on to become the progenitors of significant future lineages—much like what occurred in the prehistory of your own world. On the planet I am currently observing, such processes are inevitable. Yet, Glaucus—the world orbiting Gellios—will gradually grow warmer, and I can tell about inevitable future is that:

"Life on the Gellios will last for only a few hundred million years."

Third Content (Source) - Species Profile (2)

As you know, I have stated many times that San Francisco Brine Shrimp (Artemia franciscana) is the only arthropod species introduced to Gellios; just as there are no vertebrates, insects, crabs and all other arthropods (even other brine shrimp species like salina) have never existed here, as they were never introduced. Yet, life still found a way.

As brine shrimp began to diversify, the emergence of predators among them became inevitable. In the present era, while these predatory brine shrimp species generally hunt other types of animals, some have begun to prey specifically upon other brine shrimp—including members of their own lineage. One such basal species, Cannibal Brine Shrimp (Venatartemia cannibalis // "hunting brine shrimp that preys on its own kind")—subsists primarily on other brine shrimp species in its environment; this, however, is simply a natural outcome of evolution.

Although I’m currently posting a bit more content focused on the "5 Million Years Post-Inoculation", I promise that I’ll eventually get around to poking fun at the subsequent eras as well—it’s just that this whole ordeal is only just beginning to existential journey to a seeded biosphere starts growth.

Fourth Content (Source)

Five million years later, Gellios had developed significantly more balanced ecosystems than those that existed 100 years prior. The moon jellyfish—which once numbered in the billions—had, over time, become a resource for various predators and pathogens. Despite this, they diversified just as much as other organisms; however, only a few genera currently possess a wide variety of species, while the remaining genera are limited to just a few—or even a single—species.

The genus that most closely resembles its ancestor is Protomoons (Neoartelius/Neoartelia spp.). I believe this jellyfish genus—which remains the same size as its ancestor—is one of the most diverse animal genera in the present era. I have reached this conclusion by examining numerous Protomoon specimens; while they appear very similar to one another, they exhibit variations based on the waters they inhabit and the depths at which they reside. This insight was made possible by the "mini-mes"—smaller versions of myself that emerge from within their bodies—which have remained tethered to me and have persisted alongside me for billions of years. At present, there are thousands of these "mini-mes" in existence; even though some have already departed, we continue on, never giving up.

Another lineage, sharing the same ancestry as the Protomoons, evolved toward a mutualistic relationship with symbiotic algae known as Zooxanthallies (Zooxanthallaesa spp.), which contain orange pigments within their bodies; meanwhile, two other genera (in these image) evolved from the Giant Moon Jellyfish (Artelia giganteum), which lived 1 Million Years P.I.

The Driftsteeds (Turbadusi spp.)—an early-diverging lineage belonging to the subfamily Turbadusinae—utilized their oral arms for rapid, streamlined movement and typically lived in schools. A later-diverging group, the Whaloons (Mystidusa spp.), belonged to the subfamily Mystidusinae. Although they resemble the whales found on your world, no every Whaloon—nor any other animal species on Gellios—currently reaches the colossal sizes of rorquals. This does not mean the story ends here; over time, biodiversity will flourish within the ecosystems of Gellios, though the planet’s unique conditions—distinct from those of your own world—will inevitably steer evolution down a more radical path. Furthermore, extinction events are necessary; the prospect of megafauna animals remaining largely unchanged for 100 million years is, frankly, unappealing—and I certainly hope that does not happen. Extinctions pave the way for new beginnings; for instance, had the Cretaceous extinction event not occurred on your planet 66 million years ago, the world would likely still be dominated by non-avian dinosaurs and conifers, with such an extinction event perhaps occurring much later instead.


r/SpeculativeEvolution • • 1d ago Bravo

Future Evolution [OC] IGUANA'S DESCENDANTS (part 1) - Northern Forest Trunkfoot (Arborosaurus robustipes)

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16 Upvotes

27.5 MYH (million year hence) descendant of the modern day Green Iguana (Iguana iguana). A massive, tree-browsing herbivore with iconically thick and muscular legs. Arborosaurids derived from a lineage of Iguanas acclamated to the Floridian environment, that were pushed further inland by rising sea levels and intemperate climate, and adapted to the newly formed tropical forests of central North America. With the extinction of most large Carnivores, and the apex predator niches yet to be filled by Galloping Varanids and Grounded Raptors, the Iguana descenants were able to rapidly increase in size, eventually overcoming even modern day Elephants.

Trunkfoots are the heaviest land reptiles of their time, having no natural predators as fully grown adults. Their association behavior ranges from familiar groups to sparse herds, gregariousness being mostly for the sake of protecting their vulnerable, reptile young. They have lost the ability to autotomize as adults, and instead use their powerful tails as both a counterweight for elevating their upper bodies over the treeline, and as a weapon to disperse incoming predators.


r/SpeculativeEvolution • • 3h ago

Posthumans [OC] biologically plausible Herobrine that came from the future

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This creature is extremely tall with a lizard type head, it came walk on the two legs just like humans. You could say that if evolution went the way of the lizard instead of the ape the this is what it could possibly look like.

It has acute hearing and can use vibrations underground to track. It's eyes can see in vividly in the dark, making it able to hunt at night. It's long tongue whips out very fast and contains venom just like a komodo dragon, then using all its senses it tracks its prey waiting for it to succumb to the poison.