The life cycle of R. aculabialis: A, cluster of termite eggs; B, cell division in termite eggs; C, the primitive streak; D, 1st instar nymph; E, 2nd instar nymph; F, 3rd instar nymph; G, 4th instar nymph; H, primary reproductive; I, neotenics; J, mature neotenics K, newly reproductive male and female Alates; L, swarmer alate.