Just like life , The consciousness evolution also has branched off multiple times at multiple locations to provide such diversity to the evolutionary gradient to consciousness.
We began our consciousness journey from unicellular level and we do have our ancestral roots in the bacteria. The genes which govern simple consciousness are still operating at cellular level (30 percent of human DNA are belongs to the primordial DNA of ancient bacteria which generated that macro level conciousness in them
We also harbor bacterial level consciousness at cellular level and govern by the same bacterial genetic finger print
Simple ganglia related networks of worms , insect are that evolutionary remnants which are also present in out enteric nervous system which has been most primitive consciousness creative systems of macro level evolution of consciousness