Aftermath: End Of Holocene

In 2036, an asteroid about the size of Mt. Everest smashed into the gulf of West Africa. The impact caused massive tidal waves, earthquakes in the southern hemisphere, worldwide forest fires, and volcanic eruptions. All humans died out, along with most large animals. But some animals such as insects, worms, arachnids (spiders, scorpions, etc.), certain species of small fish, some shark species, cane toads, small and adaptable frog species, some salamander/newt species, monitor lizards, small lizard species, certain snake species, many species of (non-endangered) crocodilians, green sea turtles, leatherback sea turtles, tuataras, falcons, rats, mice, moles, mongooses, weasels, European rabbits, dylanuses, and badgers survived the extinction that killed off humans, dogs, cats, cows, sheep, pigs, lions, tigers, bears, elephants, and most other large animals. This is what life will be like 25 million years after

North America

 * Rabbalope - Descended from European rabbits that survived extinction and replaced deer and pronghorns that sadly died out. They resemble a deer, but with a rabbit head and with no antlers.
 * Plains Dylanus - Descended from dylanuses that survived extinction. Their ancestors were the largest mammals that survived extinction, the American common dylanus. Plains dylanuses resemble a modern dylanus, but they now have complex digestive system and stronger teeth in order to eat grass. They replaced the long-extinct bison. They also have a coat of brown fur, unlike their ancestors. Plains dylanuses are still bipedal animals, unlike modern bison.
 * Bearbadger - Descended from badgers that survived extinction. They have replaced the now-extinct bears. They resemble a hybrid between a badger and a black bear. They are about the size of a grizzly bear they have replaced. They are more predatory than their ancestors, able to prey on young plains dylanus.
 * Wolfrat - Descended from rats that survived extinction. They have filled the niche left behind by the long-extinct wolves. They are the main predators of plains dylanus. They resemble a cross between a modern brown rat and a gray wolf. They are fully carnivorous, unlike their ancestors.
 * False Lemur - Descended from rats (despite their name) that survived extinction. They have a niche similar to the now-extinct monkeys and lemurs. They resemble a hybrid between a rat and a monkey. They are more herbivorous than their ancestors, but still eat some meat.
 * Terror Falcon - Descended from falcons that survived extinction. They filled the niche of the prehistoric terror birds. They resemble a terror bird species, Titanis, but with slightly skinnier bodies, heads, necks, and legs. They are the last bird species left on earth.
 * Prairie Alligator - Descended from American alligators that survived extinction. They have a niche of a Triassic postosuchus. They resemble a mesozoic Notosuchid, but with an alligator head. They are known to eat small mammals, smaller reptiles, and bird eggs (including eggs of terror falcons).

South America

 * Rabir - Descended from European rabbits that survived extinction. They replaced the now-extinct tapirs. They resemble a cross between a rabbit and a tapir. They have a tapir-like body and a rabbit-like head, but with a tapir-like trunk. They are the largest land animals of future South America, about the size of a long-extinct hippopotamus.
 * Mongoar - Descended from mongooses that survived extinction. Their ancestors came from Caribbean islands after they were connected to the rest of South America shortly after the extinction. They resemble a hybrid between a mongoose and a long-extinct jaguar they replaced. They are more predatory than their ancestors, feeding on rabirs, rabbalopes, and other species.
 * Rabbalope - Descended from European rabbits that survived extinction and replaced deer species that sadly died out. They resemble a deer, but with a rabbit head and with no antlers.
 * Giant Caiman - Descended from caimans that survived extinction. They are similar to the prehistoric Deinosuchus in appearance, size, and niche. Their favorite prey are rabirs.
 * Monkrat - Descended from rats that survived extinction. They replaced the now-extinct monkeys of South America. They resemble a hybrid between a squirrel and a baboon. They thrive in South American rainforests.
 * Coamice - Descended from mice that survived extinction. They replaced the now-extinct coatis. They resemble a hybrid between a capybara and a raccoon. They are more omnivorous than their ancestors.

Asia

 * Megarat - Descended from rats that survived extinction. They resemble a prehistoric megatherium. They replaced the now-extinct elephants. They are now completely herbivorous, unlike their ancestors.
 * Terracroc - Descended from saltwater crocodiles that survived extinction. They replaced the now-extinct tigers, bears, and wild dog species. They resemble a prehistoric Simosuchus, but with a Nile crocodile-like head. They are the main predators of young Megarats.
 * Rabbalope - Descended from European rabbits that survived extinction and replaced deer and antelopes that sadly died out. They resemble a deer, but with a rabbit head and with no antlers/horns.
 * Giant Monitor - Descended from monitor lizards that survived extinction. They replaced the now-extinct rhinoceros. They resemble a prehistoric Placerias, but with a postosuchus-like head with a plant eater's teeth. They live in small herds. Unlike their ancestors, they are fully warm-blooded rather than cold-blooded.
 * Giga Python - Descended from a species of python that survived extinction. They filled the niche of Asian crocodilians (since they became terrestrial), by developing strong armor, crocodile-like teeth, and strength. They are semi-aquatic much like their ancestors.
 * Miffalo - Descended from mice that survived extinction. They replaced the now-extinct buffaloes, zebus, and other bovines that were killed off to extinction due to an asteroid impact. They resemble a tapir, but are about the size of a gaur and has a head of a mouse. They are more herbivorous than their ancestors.

Europe

 * Wolfrat - Descended from rats that survived extinction. They replaced the long-extinct wolves. They resemble a cross between a brown rat and a gray wolf. They are fully carnivorous, unlike their ancestors.
 * Rabbalope - Descended from European rabbits that survived extinction and replaced deer and antelopes that sadly died out. They resemble a deer, but with a rabbit head and with no antlers/horns.
 * European Molehog - Descended from moles that survived extinction. They replaced the long-extinct wild boars. They resemble a tapir, but with a mole-like head. They are omnivores, unlike their ancestors (which were insectivores). They are no longer digging animals, they are fully terrestrial.
 * Weapard - Descended from weasels that survived extinction. They replaced the long-extinct leopards and other big cats. They resemble a cougar, but with a weasel-like head. They are fully carnivorous, unlike their ancestors.
 * Northern Monitor - Descended from monitor lizards that survived extinction. Their ancestors migrated North because earth in 25 million years from now is warmer than today due to a mass extinction that occurred in the year 2036. They are very close to their ancestors that survived extinction.

Africa
Megarat - Descended from rats that survived extinction. They resemble a prehistoric megatherium. They replaced the now-extinct elephants. They are now completely herbivorous, unlike their ancestors.
 * Leogoose - Descended from mongooses that survived extinction. They replaced the long-extinct lions. They resemble a hybrid between a mongoose and a tiger. They are fully carnivorous, unlike their ancestors. They are the top predators of Africa.
 * Rabbalope - Descended from European rabbits that survived extinction and replaced deer and antelopes that sadly died out. They resemble a deer, but with a rabbit head and with no antlers/horns.
 * Cheesel - Descended from weasels that survived extinction. They replaced the long-extinct cheetahs. They resemble a hybrid between a weasel and a cheetah. They are fully carnivorous, unlike their ancestors. They are the fastest land animal on earth, reaching speeds up to 70 miles per hour.
 * African  Molehog - Descended from moles that survived extinction. They replaced the long-extinct warthogs and red river hogs. They resemble a tapir, but with a mole-like head. They are omnivores, unlike their ancestors (which were insectivores). They are no longer digging animals, they are fully terrestrial.
 * Miffalo - Descended from mice that survived extinction. They replaced the now-extinct buffaloes, zebus, and other bovines that were killed off to extinction due to an asteroid impact. They resemble a tapir, but are about the size of a gaur and has a head of a mouse. They are more herbivorous than their ancestors.
 * Rattus Primatus - Descended from rats that survived extinction. They replaced the long-extinct macaques, baboons, vervet monkeys, guenons, and colobus monkeys. They resemble a hybrid between a lemur and a rhesus macaque. They less less carnivorous than their ancestors.
 * Aperat - Descended from rats that survived extinction. They replaced the long-extinct apes of Africa including chimpanzees, bonobos, and gorillas. They resemble a chimpanzee, but with a squirrel-like head. They thrive in rainforests of Africa.

Australia

 * Dingrat - Descended from rats that survived extinction. They replaced the recently extinct thylacines and the long-extinct dingos. They resemble a cross between a black rat and a gray fox. They are fully carnivorous, unlike their ancestors. They are about the size of a leopard.
 * Mousaroo - Descended from mice that survived extinction. They have replaced the long-extinct wallabies and kangaroos (and yes, sadly, all marsupials will die out because humans introduced placental mammals into Australia, outcompeting marsupials to extinction). They resemble a wallaby, but without a pouch and they give birth to live young. They are fully herbivorous, unlike their ancestors.
 * Rabbalope - Descended from European rabbits that survived extinction and filling a niche similar to deer and antelopes that sadly died out. They resemble a deer, but with a rabbit head and with no antlers/horns.
 * Australian Dragon - Descended from monitor lizards that survived extinction. They replaced the prehistoric megalania. They resemble a long-extinct komodo dragon, but are bulkier in build, and are much larger, about 15 feet long. They are the main rivals of dingrats.

Antarctica

 * Pengrat - Descended from rats that survived extinction. They replaced penguins that sadly died out. They resemble a prehistoric Ambulocetus, but are bipedal, has longer penguin-like front limbs, and has a shorter tail. They feed on fish and squid. Their ancestors came to Antarctica because they rafted from other continents. They thrive because Antarctica no longer has ice sheets due to earth being warmer than today.
 * Sealweasel - Descended from weasels that survived extinction. They replaced the long-extinct seals that sadly died out. They resemble a prehistoric Puijila, but with seal-like flippers. Their ancestors came to Antarctica through rafting.