The cockroaches are an ancient group, with their ancestors, known as “roachoids”, originating during the Carboniferous period, some 320 million years ago.
Cockroach (Wikipedia)Cockroaches (or roaches) are insects belonging to the order Blattodea (Blattaria). About 30 cockroach species out of 4,600 are associated with human habitats. Some species are well-known pests.