Complex sentence: An adult skull would have reached 80 cm with a heavy long snout, along with the long tail and short limbs shows the species to be a primitive therapsid unlike "Inostrancevia" who was more advanced.
Split into simpler sentences: An adult skull would have reached 80 cm with a heavy long snout. The long tail and short limbs show the species to be a primitive therapsid unlike "Inostrancevia" who was more advanced.