Alderfly is the name given to neuropterous insects of the family Sialidae, related to the ant-lions, with long filamentous antennae and four large wings, of which the anterior pair is rather longer than the posterior. Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Phyla Porifera (sponges) Ctenophora (comb jellies) Cnidaria (coral, jellyfish, anenomes) Placozoa (trichoplax) Subregnum Bilateria (bilateral symmetry) Acoelomorpha (basal) Orthonectida (flatworms, echinoderms, etc. ... Subphyla and Classes Subphylum Trilobitomorpha Trilobita - Trilobites (extinct) Subphylum Chelicerata Arachnida - Spiders, Scorpions, etc. ... Classes & Orders Subclass: Apterygota Orders Archaeognatha (Bristletails) Thysanura (Silverfish) Monura - extinct Subclass: Pterygota Infraclass: Paleoptera (paraphyletic) Orders Ephemeroptera (mayflies) Protodonata - extinct Odonata (dragonflies and damselflies) Diaphanopteroidea - extinct Palaeodictyoptera - extinct Megasecoptera - extinct Archodonata - extinct Infraclass: Neoptera Orders Blattodea (cockroaches) Isoptera (termites) Mantodea (mantids) Dermaptera (earwigs) Plecoptera (stoneflies) Protorthoptera - extinct Orthoptera (grasshoppers... Families Sialidae - Alderflies Corydalidae - Dobsonflies & Fishflies Megaloptera, from the Greek words mega, meaning large, and ptera, meaning wing, is an order of insects containing alderflies, dobsonflies and fishflies. ... William Elford Leach FRS (February 2, 1790 - August 26, 1836) was an English zoologist and marine biologist. ... Classes & Orders Subclass: Apterygota Orders Archaeognatha (Bristletails) Thysanura (Silverfish) Monura - extinct Subclass: Pterygota Infraclass: Paleoptera (paraphyletic) Orders Ephemeroptera (mayflies) Protodonata - extinct Odonata (dragonflies and damselflies) Diaphanopteroidea - extinct Palaeodictyoptera - extinct Megasecoptera - extinct Archodonata - extinct Infraclass: Neoptera Orders Blattodea (cockroaches) Isoptera (termites) Mantodea (mantids) Dermaptera (earwigs) Plecoptera (stoneflies) Protorthoptera - extinct Orthoptera (grasshoppers... Alderfly is the name given to neuropterous insects of the family Sialidae, related to the ant-lions, with long filamentous antennae and four large wings, of which the anterior pair is rather longer than the posterior. ... In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals. ...

The females lay a vast number of eggs upon grass stems near water. The larvae are aquatic, active, armed with strong sharp mandibles, and breathe by means of seven pairs of abdominal branchial filaments. When full sized they leave the water and spend a quiescent pupal stage on the land before metamorphosis into the sexually mature insect. Chrysalis of Gulf Fritillary in Georgetown, South Carolina Pupation of Inachis io A pupa (plural: pupae or pupas) is the life stage of some insects undergoing transformation. ... Metamorphosis in a process in biology by which individual physically develops after birth or hatching involving significant change in form as well as growth and differentiation. ...

Sialis lutaria is a well-known British example. In America there are two genera, Corydalis and Chauliodes (more commonly called "Fishflies"), which are remarkable for their relatively gigantic size and for the immense length and sabre-like shape of the mandibles.