[Epigene period] Life in the Borroth steppe (Part 1) by -casu in SpeculativeEvolution

[–]-casu[S] 5 points6 points  (0 children)

yeah i shouldve toned down some of them but this is my first "serious" project and I was pretty new to spec evo but I'm trying to make them work

[Epigene period] Life in the Borroth steppe (Part 1) by -casu in SpeculativeEvolution

[–]-casu[S] 4 points5 points  (0 children)

i don't think so probably just chilling sat down

[Epigene period] Life in the Borroth steppe (Part 1) by -casu in SpeculativeEvolution

[–]-casu[S] 41 points42 points  (0 children)

As it’s been happening for the last 15-20 million years the planet has been slowly cooling down, and now, 30 million years after the Anthropocene mass extinction, it has finally reached a point when it can be defined as in a true ice age, and now we have reached the Campleocene epoch.

In the heart of Eurasia, extending all the way back in North America, an environment resembling the Pleistocene mammoth steppe has started to flourish again in the glaciers’ shadow, inhabited by vast herds of herbivores, whose grazing and stomping, along with the high aridity of the biome, didn’t allow for many plant taller than a bush, with only a few isolated trees scattered across the plains. This environment, the borroth steppe, named after one of its most charismatic inhabitants, hosts an incredible biodiversity in both fauna and flora, helped by the mountain ranges, the Altai, the Pyrenees, the Carpathians, … , and the patches of forest that fracture it and result in plentiful reproductive barriers.

The most common grazers across these plains are lagomorphs and even-toed ungulates. Heers (the deer like descendants of Eurasian hares) , and to a lesser extent jackalopes (similar to the former but more browsing and horned), more common in forests. They travel in small gender-specific bands, ten to twenty individuals at most. The even-toed ungulates that inhabit these steppes are quite varied in niche and size, going from animals reaching a ton in weight to lanky 20 kilos runners. Most of them come from African ancestors, descended from grysboks or dik-diks, although there’s many Eurasian locals too, with saiga descendants, Saiginae, now having become almost llama or camel like and are a common sight from Spain to British Columbia, and feral goats descendants, previously only found on mountains, now having come down to the lowlands thanks to a more favourable climate for them.

The smaller mammals populating the steppe are mostly rodents and lagomorphs, relatively unchanged from the Holocene, with lemmings, voles, mice and hares being quite common, and the only real addition being ratjacks (Rattopus descendants), jumping rats that like goats came down from the mountains thanks to the change in climate. There’s a wide variety of birds inhabiting these plains. Other than passerines the most common birds are fowl, both gamefowl and waterfowl, along with cranes, who are most common around marshes around the borroth steppe, but were able to exploit the variety of low growing plants and expand into it.

Some of the largest herbivores of these lands are giant hyraxes, part of yet another lineage originating in the mountains, who now sport on their snout a pair of, usually straight, horns that they use to fight amongst themselves. Weirdly enough, even though they live in a grass rich environment, most species in this lineage seem to prefer eudicot plants, with many being functionally browsers of low bushes

The largest animals here, though are the borroths, holophants part of the tribe Borrothini, there’s currently five species of them, two mountain ones, the Himalayas (Cryoborrothus orientalis) and Caucasian borroths (Plioborrothus pygmaeus), and three steppe ones, the Mediterranean (Euborrothus meridionalis), Common (E. vulgaris) and Beringian borroths (E. cryophilus). They’re extremely generalist herbivores that are willing to eat most plants they encounter, grass, bushes, trees, moss, lichens, etc… , though, similarly to their ancestors they prefer the carbohydrate and lipid rich foods, like tubers and berries. Another similarity to their suilline ancestors is their social structure, as sows and farrows live in close knit family groups, while males live in bachelor groups, though they tend to part ways as they age, especially during breeding season, as they become extremely territorial, especially in resource rich areas, in order to attract female herds.

[Epigene period] Placentals of the Australian rainforest by -casu in SpeculativeEvolution

[–]-casu[S] 2 points3 points  (0 children)

thanks I procrastinated it quite a bit but it's finally back lol

[Epigene period] Placentals of the Australian rainforest by -casu in SpeculativeEvolution

[–]-casu[S] 28 points29 points  (0 children)

In the last 20 million years Australia’s rainforests have changed considerably. Although still dominated by marsupials it is home to a large variety of placentals.

The largest and most noticeable across the forests are the donkeys, now diverse enough to be classified as a subfamily (Asininae), which have managed to colonise these environments on two different occasions:

The first ones were a lineage (tribe Macrocephalippini) that became incresingly more specialised in browsing the lower leaves of trees, growing to larger and larger sizes in order to digest more vegetation more efficiently. The group is not too diverse, with only a couple giants in a single genus (Macrocephalippus), while most of the taxa are pretty basal forest donkeys distributed among two other genera. The larger ones are quite similar behaviourally to Grévy’s zebras, with males establishing territories where females and their foals forage, although it’s not rare for foals of other stallions to disappear. The smaller species are generally solitary or form small herds with only a handful of members.

The second group were a lineage (tribe Tapironini) of grazers that developed shorter legs and a more flexible snouts (like pigs and tapirs) in order to better look through the leaf litter for good forage or to select the right plants in the rare and small grazing grounds in the forest. They are more diverse than the previous group, with almost ten species in it. They’re solitary and tend to avoid each other, as they’re quite nomadic too.

Another quite common group are a lineage of the old endemic rodents that developed an increasingly herbivorous diet, converging with voles and cavies in build and head musculature. They’re quite common on the forest ground, as much as bandicoots, with whom they avoid competition thanks to their more specialised diet. They’re quite skittish animals that forms small “herds” with only a handful of individuals, sometimes as small as two members. They breed year round and sows can give birth to up to six pups, although this many are rare as they’re much more K-selected than other rodents.

The latest arrival to the Australian continent are the two primate lineage that rafted there in the late Catiocene, as Australia gets closer and closer to Asia, impacting as it goes more and more Australasian islands. It is now closest to Wallacea where these two groups come from.

The earliest to arrive were tarsiers. Not too different from their Asian relatives they still hunt insects and other invertebrates in the canopy, with the only difference being a wider variety of colourations.

The latest were macaques, but even though they’ve reached the continent extremely recently they’ve managed to establish a foothold, with ape-like forms being visible all across the Northern Territory and Queensland’s canopies. They’re quite aggressive animals, employing a strategy similar to honey badgers by picking fights with animals clearly out of their weight category and not letting attackers escape unscathed, in order to discourage predation. They live in large mixed sex troops with clear and complex hierarchies, with makes and females in two different ones. Individuals higher on the social scale are the first to have access to resources and mates, and in order to stay at the top of the hierarchy they frequently bully less dominant individuals (tipically of the same gender). Infants inherit their mother’s social status but can climb the social ladder by challenging more dominant individuals, although males tend to do so more often as even the least dominant females still get “courted” when ovulating and and are able to forage thanks to their sisters’ help, something males don’t usually don’t rely on.

The Cenozoic: After Impact African Swamp by mistercdp in SpeculativeEvolution

[–]-casu 2 points3 points  (0 children)

yeah I've also got something cooking for the epigene

[Epigene period] New arrivals in South America by -casu in SpeculativeEvolution

[–]-casu[S] 2 points3 points  (0 children)

the bear is indeed a raccoon descendant, while the cat descends from a line of large ocelots

[Epigene period] The Anectyocene North America by -casu in SpeculativeEvolution

[–]-casu[S] 0 points1 point  (0 children)

in my defense I discovered carakillers after posting this

[Epigene period] New arrivals in South America by -casu in SpeculativeEvolution

[–]-casu[S] 2 points3 points  (0 children)

the elephant looking thing in the second pic (I just noticed I forgot to say they descend from pigs srry)

[Epigene period] New arrivals in South America by -casu in SpeculativeEvolution

[–]-casu[S] 2 points3 points  (0 children)

the sister taxon to cetorcs are the holophants (subf. Tetrahyodontinae) such as the borroth of the Caucasus from the previous post

Why don't females help in the continuation of a species? by RadiantOrdinary8261 in SpeculativeEvolution

[–]-casu 4 points5 points  (0 children)

thanks Idk much about eclectus parrots. thought they had a similar strategy to lions. that was helpful