mastotermes electromexicus is an extinct species of termite in the family mastotermitidae known from a group of late oligocene to early miocene fossils found in mexico. "m. electromexicus" is the only species in the genus "mastotermes" to have been described from fossils found in mexican amber and was the first member of the genus described from the new world. the only living species of "mastotermes" is "mastotermes darwiniensis" which is found in tropical regions of northern australia.