Which of the following families represents rolled-winged stoneflies?

The family that represents rolled-winged stoneflies is Leuctridae. Members of this family are characterized by their unique morphology, notably the shape of their wings, which are often rolled tightly along their bodies when at rest. This wing structure distinguishes them from other stonefly families that have different wing orientations or structures.

Leuctridae includes species that are commonly found in clean, fast-flowing freshwater environments. Understanding their characteristics and ecological roles can aid in identifying them in the field, contributing to freshwater biodiversity assessments.

The other families listed feature different characteristics: Capniidae, for instance, consists of snow stoneflies that have distinct wing shapes and habitats; Perlidae includes the traditional stoneflies that are often more robust; and Pteronarcyidae, known as giant stoneflies, have larger bodies and wings that do not exhibit the rolling behavior typical of Leuctridae. Each of these families plays a unique role in their respective ecosystems, highlighting the diversity within stonefly taxonomy.