What about the size of the lavos spawns on Death Peak(?) They aren't much bigger than the party. I can't remember how big the sprite is when he destroys the tyranno lair, but if the spawns are that small when you're fighting them (the ones on the mountian) couldn't one assume that is the form it was in when it fell and it grows larger from there?
yea I think the same way, pretty much.
1. Parent reaches evolutionary peak with available resources.
2. Rises, eliminates immediate threats to its spawn. (destroys world)
3. Gives birth to spawn.
4. Lives on or dies (who knows)
5. Spawn slowly grows.
6. When they reach some unknown point of maturity they leave the "nest".
7. They find a new "nest" (either homing in on life-bearing planets, or randomly wandering through space)
8. Rinse, repeat
Looking at the sprites, Lavos in 65mil BC looks like it would be bigger than the spawn we see in the game, but much smaller than the fully matured Lavos we see erupt in 1999AD.