Figure 1
Castes in Cryptotermes secundus. (A) A sterile soldier. (B) 'Large immatures', generally called helpers or workers as they are assumed to provide help like in other social insects. (C) Two neotenic replacement reproductives (brown individuals) together with 'large immatures'. Neotenic replacement reproductives develop from 'large immatures' through a single moult when the reproductives of a colony die. (D) Winged sexual (alate). They develop from 'large immatures' through five nymphal instars (individuals with wing buds) and leave the colony to found a new colony.