the fossils assigned to the "roachids" are of general cockroach-like build, with a large disc-like pronotum covering most of the head, long antennae, legs built for running, flattened body and heavily veined wings with the distinct arched cup-vein so typical of modern cockroach wings. like modern cockroaches, the roachids were probably swift litter inhabitants living on a wide range of dead plant and animal matter.