15 Un-written BrahmaLokas in Dhammacakkapavattana sutta

I was wondering about Dhammacakkappavattana Sutta. All i know is that when buddha turned the dhamma wheel for the first time, all of the residents of Devalokas and The Rupa-Brahmalokas came and claps their hands. There's this 1 phrase which sounds: "Brahmakayika deva saddamanussavesum" As for Brahmakayika is the lowest of brahmaloka [1st Jhana Realm]. I don't think brahmakayika could represent all of the rupa-brahmalokas [Inculiding 1st 2nd 3rd and 4th Jhana Realms] The Question is, why other rupa-brahmalokas name were not included or unwritten in the text, did they forget to write it or is there any missing text during that time? Thank you, LomX