What is the family name of brush-legged mayflies?

The family name of brush-legged mayflies is indeed Isonychiidae. This group of mayflies is characterized by their distinctive brush-like hairs on the legs, which play a crucial role in their life cycle and habitat preferences. Isonychiidae is primarily found in freshwater environments, where they serve important ecological roles, such as indicators of water quality due to their sensitivity to pollution.

In the context of mayfly taxonomy, Isonychiidae stands out due to specific morphological features, reproductive strategies, and ecological niches that distinguish them from other families. They are typically associated with clean, flowing waters, and their presence can indicate the health of these aquatic ecosystems.

The other families mentioned do not pertain to brush-legged mayflies. For instance, Polymitarcyidae and Leptohyphidae represent other lineages within the order Ephemeroptera but are distinguished by different anatomical features and ecological behaviors. Hemiptera, on the other hand, is an entirely different order that includes true bugs, which are not closely related to mayflies and have a different set of characteristics and life cycles.