Which of the following is NOT an example of Diplopoda?

The correct identification of Diplopoda refers specifically to the class of animals known as millipedes. This group is characterized by having elongated bodies composed of many segments, each with two pairs of legs per segment, leading to the common name "millipede," which means "thousand legs."

When considering the options provided, crayfish do not belong to this category. Instead, they are crustaceans within the class Malacostraca and are entirely different in form and structure compared to millipedes. Crayfish are aquatic creatures, with a hard exoskeleton and specialized appendages for swimming and foraging.

Pillbugs and sowbugs, although often mistaken for insects due to their terrestrial habitats, are also not classified under Diplopoda. They fall under the order Isopoda within the class Crustacea. These creatures exhibit a range of adaptations for life on land but maintain their distinct classification as crustaceans rather than myriapods.

This distinction is important in understanding the taxonomy of these organisms and recognizing the unique characteristics that define each group.