text: Ko ngā pūrangi tuatahi e whai ana i ngā āhuatanga pūhohe pūnoa o te rā kā ki te wā o Paleoproterozoic, i ētahi 2.4 i mua; Ko ēnei rauropi pūtaumaha he hanga āhuatanga āhua ka taea e te whakawhānuitanga anō.