Roaches10 Jul 2020 10:27
****roaches (or roaches[1][2][3]) are insects of the order Blattodea, which also includes termites. About 30 ****roach species out of 4,600 are associated with human habitats. About four species are well known as pests.
The ****roaches are an ancient group, dating back at least as far as the Carboniferous period, some 320 million years ago. Those early ancestors however lacked the internal ovipositors of modern roaches. ****roaches are somewhat generalized insects without special adaptations like the sucking mouthparts of aphids and other true bugs; they have chewing mouthparts and are likely among the most primitive of living Neopteran insects. They are common and hardy insects, and can tolerate a wide range of environments from Arctic cold to tropical heat. Tropical ****roaches are often much bigger than temperate species, and, contrary to popular belief, extinct ****roach relatives (Blattoptera) and 'roachoids' such as the Carboniferous Archimylacris and the Permian Apthoroblattina were not as large as the biggest modern species.
Some species, such as the gregarious German ****roach, have an elaborate social structure involving common shelter, social dependence, information transfer and kin recognition. ****roaches have appeared in human culture since classical antiquity. They are popularly depicted as dirty pests, though the great majority of species are inoffensive and live in a wide range of habitats around the world.