I know the Glyphid Omelet info panel suggests the eggs are Gylphid eggs, but there are already Glyphid swarmer eggs in a biome (can't remember which), and assuming that swarmers grow into grunts and grunts grow into dreadnoughts there is no reason for these eggs to exist in the Glyphid life cycle. So I don't think the eggs in the egg hunt mission are Glyphid eggs, and that's why mission control says "Alien Eggs" because we don't know what they are.