Suborder Megaloptera is a group of aquatic insects that are commonly known as dobsonflies, alderflies, or fishflies. These insects are characterized by their large wings and elongated mandibles. There are other synonyms that can be used to refer to this group of insects. Some of these include the superfamily Corydalidae, which includes the dobsonflies and fishflies. Another synonym is the family Sialidae, which includes the alderflies. The order Neuroptera is also used as a synonym for this group, which includes dobsonflies, alderflies, fishflies, and lacewings. These insects are fascinating to study and are important indicators of the health of aquatic ecosystems.