Figure 5. SEMs of the posterior part of adult F. gigantica following 24 h incubation in 30 µg/mL myrrh volatile oil.

a: SEM of the mid-body region showing tegumental swelling in the interspinal region. In this specimen, some of the spines were split and took the form of opened jaws (arrows). b, c, d: SEMs of the tail region revealing swelling and furrowing of the tegument, and disruption to the upper surfaces of the spines. Some areas showed either severely swollen (black arrow) or completely damaged (white arrow) spines.