manglisaurus

[manglisaurus]

Triassic collision: The macrosaurids

After the triassic mass extinction ended up wiping out all the herbivores, it would lead to an increase in mammaliformes which would now start spreading to fill the huge vacancy left behind. This would in turn lead to an increase in carnivorous coelurosaurs, causing groups like tyrannosaurs to evolve earlier in this timeline.

However, one special lineage that would also appear during the early jurassic would be the macrosaurids. Despite the competition from mammaliformes, this lineage of bipedal herbivorous coelurosaurs would end evolving to titanic sizes almost to that of our timeline's sauropod but would be restricted due to their bipedal stance.

The macrosaurids would be divided into 2 sub groups, paleomacrosauria and neomacrosauria. Paleomacrosauria would be the group that would evolve convergently to our timeline's sauropod while the neomacrosaurs would evolve into a niche similar to hadrosaurs.

Somewhere in gondwana, a young autosaurus attempts to hunt an old male canthosaurus. Reaching 13 tons, the canthosaurus would be one of the earliest and basal member of the paleomacrosaurs as it still possesses functioning arms unlike later members which would completely lose their arms. This species also sports a long single sail that runs from the head to the torso, in males this sail is brightly colored. Males are known to engage in combat where they brutally punch eachother with their clawed arms. This young male autosaurus, an acrosaurid with abelisaur like arms doesn't realize that he is about to get brutally punched to death.

Similar to the canthosaurus, another basal and early member of the macrosaurs is the deinosaurus. An 8-10 ton neomacrosaur with a large hump or sail that would roam laurasia filling the niche of a large grazing herbivore. Just like the canthosaurus, the deinosaurus still possesses functional arms unlike later members who would completely render their arms useless. The deinosaurus uses these arms to usually grab branches but is believed to have used it for attacking if it needed to.

[manglisaurus]

Triassic collision: The high lizards.

During the early jurassic, the coelurosaurs would also diversify but with the rauisuchians around. They would be restricted to smaller forms.

However, the rauisichians would eventually go extinct by the end of the middle jurassic. Finally giving the dinosaurs a chance to once again reign over the earth.

While tyrannosauroids and dromaeosauroids would also evolve during this period, the late jurassic would instead be ruled by a group known as the acrosauroids.

The acrosauroids, also known as the high lizards. Were the first theropods to reach sizes that we would consider big. They would quickly evolve and fill different niches.

The smallest and most basal of the acrosauroids would be the monoceratosaurus (One horned lizard), this is especially obvious by its smaller size and thinner build. Only weighing 1 ton despite being almost the same height and length as the ceratosaurus from our universe. These animals usually prey on smaller prey like deer sized mammaliformes or other coelurosaurs, and are especially known to target the eggs most of the time. One interesting thing about this animal is its single horn on its nose, which is considered to be used for attracting mates.

Then we have acrosaurus (High lizard), which the entire group is named after. Being the most popular and also the first acrosauroid, this animal is iconic for its large sail on its tail. The exact purpose of the tail is still unknown, but its mostly considered to be used for attract mates or for heat regulation and cooling the animal. Acrosaurus was by far the most successful predator of the late jurassic, hunting large herbivores and chasing out other theropods of the area.

However, the largest acrosauroid by far would be gigsaurus (Gigantic lizard). The most interesting part of this dinosaur is its hump or sail on its neck, the purpose of this hump has debated because of its odd placement. Not only that, the hump would have also restricted the animals neck movement. Because of this, it is believed that gigasaurus would have hunted smaller prey or scavenged food. This is also not helped by the gigasaurus's fragmentary nature, with the first fossil ever discovered being mistaken to be an acrosaurus. Not only, the gigsaurus is also believed to be closely related to acrosaurus but this has also been debated. Unless more material is found, the gigsaurus and its hump still stays a mystery.

The final acrosauroid that we are gonna talk about is the carcharosaurus (Shark lizard), what makes this acrosauroid interesting is its aquatic adaptations. As younglings, the carcharosaurus are born with 2 fingers with their third finger having evolved into a fin. But as they get older, their fingers eventually fingers will smaller before completely disapearing. It's believed to have hunted near the shores, lakes, and rivers. Their diet consisted of fish, crocodiles, thalattosuchians, small mammaliformes and coelurosaurs.

[manglisaurus]

Triassic collision: The last terrestrial loricatas.

The rauisuchians were not the only loricatas to diversify after the triassic extinction, usually ones that were more closely related to prestosuchus or saurosuchus.

These lorictas would evolve into large predators, as large herbivorous coelurosaurs and mammaliaformes had also started to evolve during the early jurassic.

One such example is megalosuchus, a loricata rivaling even the size of fasolasuchus.

Megalosuchuses are usually terrestrial predators but are known to hunt aquatic prey, they are also known for their strange horn on the end of their snout. The exact purpose of this horn is still unknown, but its usually considered to be a mating display.

Just like the rauisuchians, these large loricatas would also eventually go extinct at the end of the jurassic. Especially with the arrival of specialized mammaliaforme predators.

[manglisaurus]

You can making creatures of Triassic Collision???

Yep.

[manglisaurus]

Triassic collision: The last of the rauisuchians.

Despite being badly affected by the triassic extinction, rauisuchians would still barely survive into the early jurassic.

With the sun being blocked by atmospheric dust because of the asteroid, and a long winter caused by volcanic ash. All the large dinosaurs would go extinct, giving rauisuchians a small chance to diversify.

The rauisuchians would diversify into mid-sized predators that would hunt coelurosaurs and mammaliformes which were starting to also diversify during the early jurassic.

The rauisuchians you see here are tyrannosushus and carnosuchus.

Tyrannosuchus are territorial ambush predator that hunt mid-sized herbivores, these herbivores are usually mammaliformes and coelurosaurs.

Carnosuchus on the other hand are more slimmer, these rauisuchians are generalists and scavengers. They are known to dig their way onto the burrows of smaller animals and lay their eggs after getting devouring the original residents similar to how some modern snakes will steal burrows of the mice they eat. Males of this species are known to possess a single protruding horn with bright color which they use for attracting mates.

[manglisaurus]

Triassic Collision, If the KPG extinction happened way more earlier.

Triassic Collison is a spec evo project inspired by jurassic impact, but this time the kpg extinction happens way earlier during the triassic.

While some coelurosaurs and loricatas survived the extinction, the archosaurs never got the chance to become the dominant clade.

Instead, the earth would be retaken by the mammaliformes.

The ichthyosaurs and plesiosaurs were not spared either, the seas would instead be ruled by thalattosuchians.

[manglisaurus]

Altispinax (Aka, the not spinosaurus.)

[manglisaurus]

Drew what I think spinosaurus will look like in the future.

This is based on the fact that we still don't know what its arms or the tip of the tail looked like.

[manglisaurus]

''Recently, many people have started going missing without any trace or evidence left behind. Many have claimed to have seen humanoids that almost resemble gojira, always appearing before a person goes missing.''

[manglisaurus]

2 fanmade creatures for lethal company, the sky behemoth and mother ness.

The sky behemoth will swoop down to catch the player.

Mother ness will appear in flooded areas, just get out of the way if you hear splashing.