Last time we took a look at Paart, we skipped pretty much 4,2 billion years of history, which I am later coming back to, but for now, we head to what - on Earth - we call the transition from the late Pennsylvanian to the Early Permian period, it occurred about 300 million years ago.
The salamanders are no-longer the masters of the landmasses of Paart, but the pseudo-synapsids and pseudo-sauropsids, yes, I am using 'pseudo' because those terms are only applicable to Earth's life, terms like fish or reptile may be used eventually due to obvious similarities, but those are merely of comparative/familiarity choice, nor species of other planet are by far relatable to those of Earth even though convergent evolution made the same adaptations on both.
Remember Lisa? She and her other amphibian counterparts started to colonize the land during the Paartian equivalent of the Lower Carboniferous period.
The Paartian body plan has been defined by the hexapods, as follows, a simplified design bellow.
Two eyes, one mouth, six censorial/mood/display antenna (detecting air variations, as they can't see through the UV mist), two ear-drums (not marked but located between eyes and antennae), frontal limbs closer to the body to grand fast push up and steering, intermediate limbs most apart from the body to avoid limb overlap and grater balance over cliffs and to crawl over rocky beaches, hind limbs extend longer than others and is the strongest of the limbs, it's position is quite efficient in burst-sprints to evade other predators over land.
This design evolved from fish that developed muscles in a manta-ray configuration, these muscles had the function of undulate in coordination in such way to provide impulse, like mantas do.
Like this...
This design later evolved to individual "mantas" or primitive fins, and later to fully formed fins, the continental drift that dried out several cyanobacteria colonies on the beaches, also created access to inland through bays, and atolls of dead stromatolites created shallow and safe waters for low depth fishes, those fishes needed to excavate to properly bury their eggs, and those further developed stronger muscles and more adequate sizes to the task, as follows, amphibians eventually appeared, leading to the Great Ancient Salamanders, like Lisa, and following these, creatures able to stride several hundred kilometers upon land and feed of insects and brachiopods, pretty safe having only to compete with other few dozen species that had achieved the same ability.
As well, like Lisa, those new Paartians would have inherited the magnesium based Porphyrin IX-rich metabolism, and sodium bismuthate reactions for energy acquirement, ie, purple blood cells with fairly yellowish secretions, most of them would have a quite dark skin marked by phosphorous UV marks, but that may vary later on as we will see in some million years...
- M. O. Valent, 04/09/2019
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