Final answer:
A cicada when it first emerges from its larval state underground is called a nymph, undergoing an incomplete metamorphosis before emerging as a winged adult.
Step-by-step explanation:
A cicada that first emerges from its larval state underground is called a nymph. During this phase, the nymph stage is generally wingless and resembles the larva in form, but continues to grow in size. Insects, such as cicadas, undergo a process known as metamorphosis, which includes distinct life cycle stages: the egg, larva (or nymph for some insects), pupa, and adult. Unlike complete metamorphosis, which includes a pupal stage during which the structure of the insect undergoes significant transformation, cicadas go through an incomplete metamorphosis. This means the nymph emerges from the egg, molts several times as it grows, and eventually emerges as a winged adult ready to reproduce.
In the context of cicadas and metamorphosis, it is important to recognize that each stage of their life cycle is adapted to specific functions and habitats. The larval or nymph stage is often adapted for a different form of feeding and living environment, such as underground for cicadas, which are also known for their interesting phenomenon of synchronized mass emergence after several years of development underground.