Certain species of stick insects synthesize their own bacterial enzymes. The analysis suggests the insects picked up the special genes between 110 to 60 million years ago, before the lineage diversified into the 3,000 species it features today.

See the source article by following the link below:
Certain species of stick insects synthesize their own bacterial enzymes. The analysis suggests the insects picked up the special genes between 110 to 60 million years ago, before the lineage diversified into the 3,000 species it features today.