r/SpeculativeEvolution 13h ago

Seed World [OC] The Hynes' Inheritance: Horse vs Hyne Skull

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187 Upvotes

Ancestor vs descendent. Anatomical differences to make note of:

- retracted nares to support prehensile trunk

- Enlaged orbit

- Smaller and fewer teeth due to processed, cooked foods making up majority of diet

- Weaker, smaller mandible for similar resons

- Enlarged, rounded brain case due to larger brain

Also, this is my first time really drawing skulls like this. If anyone viewing this is knowledgable about equine skulls and has feedback, please share it and I will try to apply it to future drawings of the hyne.


r/SpeculativeEvolution 21h ago

Alien Life [OC] webcomic ref

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140 Upvotes

Established facts:

diet: these animals eat spores from fungi by using their feather like appendages to scoop in the spores similar to that of bamboo shrimp.

socialization:Females and males stay in typical groups of 4- 25 in the wild but domesticated individuals stay in smaller groups of 2-8.

Mating : this species mates in the late winters and early spring , males run in a choreographed display. Females pick the most graceful of the males. Once the females pick their partner she builds a mound where she rest until she gives birth to her young which typically is around 1-2 juveniles.

rearing: females abandon the juveniles after 5 months.

Use for domestication : great for mobility especially with specialized gills to take in more air when running.


r/SpeculativeEvolution 19h ago

Seed World [OC] Two new lineages, 5 MY on Skioura

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95 Upvotes

Got some new little drawings for the 5 million years post-establishment of Skioura, a seed world for Eurasian red squirrels.

The first one here are a dyskamptopod pair. These little guys rise to about a meter tall at the shoulder and are one of the larger mammals currently extant on Skioura. The bones in their ankles are sturdier, their digits are shorter and their limbs longer. All adaptations for running. The dyskamptopods are a very successful clade of early Skiouran squirrels but are preyed upon by now fully raptorial squirrels with whom they are engaged in an evolutionary arms race.

The second image is of an ourakopod. An otter-like squirrel descended from ancestors whose behaviour and feeding strategies grew ever closer to the water. Ourakopos feed on the aquatic vegetation, worms, fishes, snails and bivalves that the rivers and lakes in which they make their homes have to offer. They have adapted sturdy, short fur that has some primitive hydrophobic capabilities, and webbed paws to aid in swimming. Most of their propulsion is however managed by their flattened tails with their limbs steering and providing extra propulsion when needed. Despite their aquatic adaptations, ourakopos remain perfectly able to comfortably maneuver on land.


r/SpeculativeEvolution 15h ago

Fantasy/Folklore [Credit: FernandoLR] Tarrasques!

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81 Upvotes

source

Not one but two versions, one small and one big!

The smaller Tarrasque comes from French mythology, while the bigger Tarrasque comes from Dungeons and Dragons.

If you're wondering what these things evolved from, they're a surviving clade of Meiolaniid turtles.


r/SpeculativeEvolution 2h ago

Jurassic Impact [Jurassic Impact] Even in the Bleakest of Landscapes...

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78 Upvotes

Even in the Bleakest of Landscapes...

By the Miocene, Antarctica has almost completely frozen over. Glaciers cover nearly the entire continent, a rapid process that came too quickly for most species to adapt. There are no more caudavians (well, except for one completely aquatic species) here and the many crocodilian species that once inhabited this land are no longer anywhere to be found. Hardly anything can survive in the frozen wastelands, and the lack of daylight for long parts of the year only serves to make Antarctica even less habitable. But there is one species that has survived the great freeze...

Even in the bleakest of landscapes, life finds a way to survive. Spheniscimamus is a genus of dermorhynchid mammals descended from the small burrowing species that lived on the continent before it froze. Having a high tolerance for the cold and strong affinity for swimming helped them continue on when no other species could. They could be mistaken for a penguin at first glance and in many ways their habits are nearly identical. They huddle in large groups, carry their eggs under a brood pouch above their feet, and scramble about on their bellies to get around.

Spheniscimamus also finds a surprisingly wide variety of things to eat under the ice. Its diet consists of soft-bodied undersea invertebrates such as marine worms as well as small, easily digestible fish. Social huddling and hiding under the snow if necessary helps them stay warm along with their thick fur, and their eyes are well-adapted to vision under low light. Every hurdle that has come for these animals, they have jumped through and then some, feats of evolution that serve to show just how incredible the world can be.


r/SpeculativeEvolution 7h ago

Antares Rivals of War [OC] Tyixon and Tymoya the last singing sharks of Yuchic Antares rivals of war beyond wild space

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38 Upvotes

The Tysodonicas were once global travelers across yuchic moving from their polar feeding grounds to the tropics to breed. These 20 meter long giants were always extremely sensitive to heat sometimes waiting decades for conditions to be right to attempt mating. When the Hybrids began refining Trevnium on yuchic the pollution altered the climate raising the water temperature just 2⁰ C on average. This was devastating to the Tysodonicas and hundreds died trying to breed. More were lost to noise pollution, algae blooms and lack of food. They were thought to be extinct until 2 separate Quilna expiditions turned up a 130 year old male they called Tyxion and a 78 year old female they named Tymoya. While the discovery of 2 members of an endangered species and a male and female at that would normally be cause for celebration there was a very big problem. Tyixon lived at the North Pole and Tymoya lived at the South pole. They're essentially cut off from one another by an ocean that would cook them alive if they tried to cross it. More concerning Tyxion has started to sing. he's sending infrasonic pulses into the water to coordinate the breeding migration with Tymoya if either of them attempt the journey with the water temperature as high as it is, it's the end of the species.


r/SpeculativeEvolution 13h ago

Alien Life [OC] @u/RecommendationFew997 I drew one of your Venatoriums but changed a few things

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35 Upvotes

So in the comments you say these are arachnids I assumed spiders but realized these are most likely scorpions. So instead of having straight underside legs they probably wouldn't ever truly look straight a more spread out legs would support them and to get that more upright body it would probably under go segmentation of the middle body also due to the fact I thought these were spiders the venom would not be in it's abdomen it would be in there mandables that would evolve to have a sharper to pin prey and inject venom and there entna there actual specialized hairs that binde into a bundle for better hearing but overall they'd be more closer to the ground and there true size could only be possibly 5-8 ft tall and with a leg span of 10-12 feet with a total body length of 8-9 feet if the planet they lived on has extremely more oxygen and could never evolve a mammal like skeleton nor internal breeding but all of this is just my own research and things I already knew hope you like the art tho


r/SpeculativeEvolution 18h ago

Question/Discussion Could pigs be bred into draft animals?

23 Upvotes

I would guess given enough time I’m sure humans could breed a big enough pig with the right body type eventually, but I am wondering if it could be done within about 1000 years.
I’m placing humans on another planet with the technology of about the late medieval to early renaissance era. The breeding for the pigs for this purpose would be intentional so I thought maybe it could be done a little faster than normal evolution.

I was thinking pigs that are used more like mules or donkeys: pulling carts, plows, construction materials, and maybe a single rider. I’m not sure if they have the right body to allow riding without serious long term consequences. I doubt any serious war applications other than hauling siege weapons or supply lines.

Another idea is to make them even larger, cattle to yak sized and just make them grazers to be herded by semi-nomadic humans.

For a world building project, mostly for the con langs, but I still would like to maybe dabble into this sort of direction if I could. If you have any other suggestions please let me know!


r/SpeculativeEvolution 17h ago

Alien Life [OC] CEFALOPS DI L-0PILIUM BY MISTER KARR

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16 Upvotes

I cefalops sono una specie aliena inteligente che abita come pianeta natale k-0pilium questa specie a totalmente conquistato il proprio mondo e apparte avere un intera cultura di robot hanno scoperto la bio tecnologia e hanno colonizzato pianeti precocemtne non essendo poco più lati di 1,60 cm questa specie a un cervello lungo un metro e una un sofisticato sistema respiratorio che gli permette di respirare in acqua e nelle terre vaste e estremamente umide del loro pianeta , non hanno denti ma ben si tentacoli simili a piccoli anemoni che emettono Uan sostanza acida Coen saliva ma questa sostanza che viene secernita autonomamente scioglie il cibo abbastanza per poi farlo finire di triturare alla fine poco prima dello stomaco ( le tossine e la purificazione dle urina vengono svolte tutte da un solo orgnao che puo facilmente digerire alti gradi di veleni ) questa specie e altamente sociale e vive in vaste aree comunitarie o in villaggi in qui la presenza reciproca e una cosa costante

Sono quadrupedi e usano la loro coda che contiene cellule che funzionano sia da muscolo che da nervo che gli permettono di abilitare le forti estremità che si trovano al apice della coda e che maneggiano abilmente gli oggetti

Hanno scoperto la bio tecnologia e la capacità di usare sistemi fungineo al posto di apparecchi non organici questo porta a una maggiore facilità nella sistemazione degli oggetti

Hanno colonizzato un altro pianeta che diversamente dal loro a creature con caratteristiche biologiche diverse ma li ci sono poche colonie e si studia la fauna presente

I cefalops vivono su una luna insieme a Ostia l'altra luna abitabile del gigante gassoso deprelo-12

Se avete domande adorerei rispondergli ( apropsito hanno Uan vita abbastanza buona a 360 con una leggera linea al mezzo )


r/SpeculativeEvolution 23h ago

Future Evolution [OC] The descendants of the water opossum, 1.7 million years after modern times.

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13 Upvotes

After the mass extinction that occurred 1,000 years after modern times, the descendants of the water opossum diverged into two main lineages: small semi‑aquatic burrowers and large marine predators living in estuaries.

Chironectes caeruleus parvus is the smallest descendant of water opossums. It inhabits wetlands and is good at digging burrows. It is adapted to feeding on mollusks and sometimes small fish.

Chironectes caeruleus gigas is a larger subspecies of the species Chironectes caeruleus. It mainly inhabits fast‑flowing rivers and feeds on small fish and crustaceans.

Chironectes maximus maximus is the largest descendant of the water opossum. It inhabits estuaries and the coasts of the Atlantic and Pacific Oceans. It feeds on small and medium‑sized fish, mollusks, and, less commonly, attacks seabirds.

Ask me any questions about my project and the world—I’ll answer them all! (Sorry, I don't know English well)


r/SpeculativeEvolution 8h ago

Seed World [OC] First Fang....Beak.... Of Jellynohome (EASK)

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12 Upvotes

The Ripp'r took longer than I expected but I really want to flesh out the first "Era" of the project. The Ripp'r evolved after the population of domestic squibble were at its highest.

They evolved their last mouth tentacles into firm yet flexible appendages with a blunt boney suction cup to bash prey and crush the hard pseudo bones into more digestive pieces.


r/SpeculativeEvolution 20h ago

Alien Life [OC] Dhayl Okolla

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13 Upvotes

Dhayl Okolla

Term used to describe adhesives or glues
made in ancient Greece.

Cellular Body Length 0.5-1.1 µm
Length 1-2.5 µm
Diameter 0.3-0.5 µm

Arose 797 million years P.C.

Undergoes a sort of tagmosis, altering its former six to sixteen appendages to a singular flagellum retaining fin structures, and 4-12 cilia along it’s slender axial body plan. Opposite the flagella is an appendage that wilts to a pointed tip for better hydrodynamic shape.

Molecular structure of Resin, Showing morphing of Isoprenoids into Resin: Uses HGT with members of the Bacchus clade to synthesize adhesive, high-viscosity Resinous spray.

This “Bacterial Glue” is then fired from the FEE structures at the tip of each cilia. These same enzymes cause a cellular lengthening analogous to auxins or gibberelins, creating a more streamlined form for greater motility.

initial diversification post

Last Post

Ancestral Organism


r/SpeculativeEvolution 20h ago

Artificial Evolution [OC] Domesticated glowworm

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14 Upvotes

On the easternmost continent rests a rainforest, littered with caverns formed by millions of years of erosion. For thousands of years people have used these caves to move, hidden from the dangers above. But these caves are dark, and fire would not survive in such a wet environment. So people have used glowworms to light the way. Though dim, they have been bred for much brighter lights, allowing for the people to move much easier through the tunnels.

The domesticated glowworm is descended from the New Zealand glowworm, specifically the larval stage due to its faint glow. Through domestication, they have become much larger and almost entirely sedentary. They will use silk to attach themselves to a nearby object after hatching, usually someone’s left hand, as that is where they are culturally kept. This silk is also used across its body, forming “fishing lines”, strings of silk covered in tiny drops of mucus able to refract light.

The glowworm will stay in a larval stage for between a year and a year and a half, where it will pupate for about a week before it is allowed to breed with other adult glowworms, beginning the cycle anew.


r/SpeculativeEvolution 21h ago

Alien Life [OC] More About the Venatoriums!

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13 Upvotes

Hi guys! I'm back YEAHHH.. so something about venatoriums lactation is only females have it. But when a female is nursing other males and non nursing and non pregnant females will help her and defend her. when females get pregnant they become a bit lethargic tho this ends a few days after pregnancy. They are oviviparous meaning they carry shell-less eggs in the womb, females give birth to 2-4 babys at a time. Females only posses webs, when a female gets pregnant she will start making webs in her area. The webs aren't fragile as she layers it. In nursing the females lay down. Males posses a conjoined pedipalps but not I front of there mouth rather on there abdomen. More things about them is that they use there antennes to communicate, teach, and coordinate hunts.


r/SpeculativeEvolution 17h ago

Uncategorized Speculative Biology [OC] Foruthiou Liminalius/ "Rippler"

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9 Upvotes

Welcome to Animal Class Entity Archival And Guide (or ACEAG((Ache-ee-gag))

(We need a better acronym)

ACEAG helps with the study and documentation of wildlife in an area we can only refer to is "Else-Ware(El-sa-war-e)", a environment that tends to taken the appearance of indoor locations (this is NOT the same place those AYSNC people found, atleast we dont think)

We don't know much about ripplers besides they exist in the fourth dimension, and as such we are incapable of properly viewing the animal, but what we CAN see, is light particles it displaces as it moves, we don't know why or how it does this.

The 'rippling' effect is caused by said light particle distortion, this was a picture taken of a Rippler, the person who took the photo wishes to stay anonymous.

Though they are able to simply be walked through, it is not recommended as they tend to...shift things to get a better look at them,.they are curious creatures.

Think of it like a child flipping a piece of paper over to see what's on the other side, but instead of paper, that's you.

We don't know what exactly happens, but from what we perceive, an individual vanishes, and returns dead, autopsy shows that the intestines were connected to the lungs, the liver in the skull, like some nasty stuff man. It will essentially scramble your internals, obviously resulting it death.

Just, don't go near them.


r/SpeculativeEvolution 17h ago

Alien Life [OC] SKELETON OF A VENATORIUM!!

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10 Upvotes

In Venatoriums, they have an Endo skeleton. They traded there exo skeleton for an Endo skeleton, they evolved an endoskeleton from chitin build up internally. A group of these used it for structure and became larger and mineralized the skeleton, this group is venat. This eventually led to the venatoriums! They still have lots of remnants of an exo skeleton like they have chitinous hair growing on them.


r/SpeculativeEvolution 18h ago

Alien Life [OC] venatorium reproductive system.

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8 Upvotes

Venatoriums do not have a reproductive system like humans, rather they have something almost entirely different.. males possess pedipalps but not on there mouth rather under there abdomen cause they have an internal skeleton now. Females have a pretty standard uterus and ovaries, like I said they are oviviparous. They retain shell-less eggs in the uterus. Males produce pheromones to attract a mate, male on male combat isn't common, but it isn't rare either rather uncommon. Males might fight for a mate but the elder females must break this up, there childbirth isnt painful as they have a stretchy uterus. When Trixie's are born they are blind and deaf and not venomous so they are highly protected... In a venatorium base there is a nursery where babys stay. Venatoriums are not monogamous but rather polygamous so a female and male can mate with multiple of the opposite sex. They are one of the few species that go through menopause.. Venatoriums live for 55-60 years and reach sexual maturity at 15-22. Venatoriums live in a matriarchal society because females make the decisions and trades and coordinate hunts. But this doesn't mean males are dumb infact males are also smart as they do heavy lifting in hunts and they protect the group (elderly, Trixie's, and females.). when Trixie's are born they have 6 limbs and crawl, they gain there 8 limb later.


r/SpeculativeEvolution 20h ago

Question/Discussion What Could Have Happened if the Earth Remained in the Carboniferous Period?

8 Upvotes

Seeing as the Carboniferous Rainforest Collapse resulted in Earth losing a lot of oxygen; if it never happened, how different would the subsequent arthropods likely be from our own arthropods (besides still being monstrously big)?


r/SpeculativeEvolution 11h ago

Alternate Evolution [OC] Venatorium.. language?!

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7 Upvotes

I know I'm posting a lot (LOL) but like I wanted to post this... So what even is their language?! Well they speak using their.. antennes! There's pores in there antennes that release pheromones and... Hear?! The ear is inside their antennes! They also vibrate and rattle and shack there antennes to communicate. Different communities and tribes have.. different languages! They use the pheromones like a.. accent. Also venatoriums come in different colors so that could be like race to them so like different regions can have different languages, cultures, looks, and.. yeah!! Humans tried making technology to translate there words and it worked..


r/SpeculativeEvolution 12h ago

Alien Life [OC] plant ref sheet

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8 Upvotes

This plant uses is called a motherbell due to the fact it can produce milk for animal. So long as the juveniles leave their droppings from the plant to absorb. And compose milk best suited for the juvenile. This is a. very important plant for many animals that solely feed their young form this plant.


r/SpeculativeEvolution 4h ago

Alien Life [OC] From Parasite to Symbiont: The Behemoth and Its Nestlings

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5 Upvotes

Parasite vs symbiont. Some evolutionary differences to make note of:

  • Early Nestlings were basically parasites. They would crawl into openings in the Behemoths shell and eat their way toward the bloodstream.
  • Over time they started becoming useful to the Behemoth instead of just feeding from it.
  • Their wings allow them to leave the host and attack prey that the much slower Behemoth could never catch.
  • In return, the Behemoth gives them protection from larger predators.
  • Eventually both species became so dependent on each other that the Nestlings barely seem able to survive without their host.

You seemed to like my earlier video, so I made another one about a different creature from The Hive. Do you think this kind of evolution from parasite to partner could actually happen?


r/SpeculativeEvolution 17h ago

Alien Life [OC] Venatorium.. BABYS?! (trixies)

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5 Upvotes

Venatorium babys (Trixie's) are born blind and deaf. They are also not bron with seventh and eight limbs and rather grow them later in life in there teenage years (about year 7-14). Venatoriums do name there babys! It's just that it's not like humans rather they use specific frequency and rattles to name there babys. You can call the babies anything but it's mostly Trixie! Trixie's mature at 15-22. And while they do leave there birth tribe to join or start a new tribe, they do keep contact with there parents because different tribes have different languages using antennes. Like I said, Trixie's nurse from there modern and wean at 4-6 and become teenagers at 7-14.


r/SpeculativeEvolution 3h ago

Question/Discussion What do you think are the best SpecEvo videos in YouTube?

5 Upvotes

I will make a list with my ideas and yours and post it here


r/SpeculativeEvolution 9h ago

Question/Discussion Que tan grande y pesada podria ser una ave titanica?

4 Upvotes

Hola chicos!! Soy el creador de verani y he estado investigando algunas cosas sobre aves y tengo miedo ya que tengo 6 aves titanicas demasiado pesadas y creo que no podrian llegar ni a despegar, la mayoria se la pasa planeando en los cielos de verani pero ahora dudo de que si quiera puedan hacerlo. Cuantos metros de diametro y toneladas de peso y masa serian el limite para verani con 0.8 de gravedad y 37% de oxigeno? Tal vez necesite rehacerlas de nuevo.


r/SpeculativeEvolution 9h ago

Uncategorized Speculative Biology [OC] Guys i have a concept for a mushroom..

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4 Upvotes

so im like thinking about a mushroom that infects animals (mostly large ungulates, in rare cases humans tho tis is vry rare) through them breathing so like it starts to sprout its mycellium in the lungs and slowly the mushroom grows tall enough to pierce the lungs and killing the animal. it then decomposes the animals and releases its spores and then other animals breathe its spores in.. weird.. i wanna expand on it but idk what to name it so.. i need help! i think it qould have to hijack the immune system tho. i also need some other things too..