
The caddisflies, or order Trichoptera, are a group of insects with aquatic larvae and terrestrial adults. There are approximately 14,500 described species, most of which can be divided into the suborders Integripalpia and Annulipalpia on the basis of the adult mouthparts. Integripalpian larvae construct a portable casing to protect themselves as they move around looking for food, while Annulipalpian larvae make themselves a fixed retreat in which they remain, waiting for food to come to them. The affinities of the small third suborder Spicipalpia are unclear, and molecular analysis suggests it may not be monophyletic. Also called sedge-flies or rail-flies, the adults are small moth-like insects with two pairs of hairy membranous wings. They are closely related to the Lepidoptera which have scales on their wings; the two orders together form the superorder Amphiesmenoptera.

The caddisflies, or order Trichoptera, are a group of insects with aquatic larvae and terrestrial adults. There are approximately 14,500 described species, most of which can be divided into the suborders Integripalpia and Annulipalpia on the basis of the adult mouthparts. Integripalpian larvae construct a portable casing to protect themselves as they move around looking for food, while Annulipalpian larvae make themselves a fixed retreat in which they remain, waiting for food to come to them. The affinities of the small third suborder Spicipalpia are unclear, and molecular analysis suggests it may not be monophyletic. Also called sedge-flies or rail-flies, the adults are small moth-like insects with two pairs of hairy membranous wings. They are closely related to the Lepidoptera which have scales on their wings; the two orders together form the superorder Amphiesmenoptera.

The Annulipalpia, also known as the "fixed-retreat makers", are a suborder of Trichoptera, the caddisflies. The name of the suborder refers to the flexible terminal segment of the adult maxillary palps, which often has many tiny rings.

Apatania zonella is a species of insect belonging to the family Apataniidae.

Arctopsyche grandis is a species of netspinning caddisfly in the family Hydropsychidae. It is found in North America.

Arctopsyche ladogensis is a species of netspinning caddisfly in the family Hydropsychidae. It is found in Europe and Northern Asia.

Athripsodes bilineatus is a species of caddisfly belonging to the family Leptoceridae.

Beraea is a genus of insects in the family Beraeidae.

Brachycentrus is a genus of humpless casemaker caddisflies in the family Brachycentridae. There are at least 30 described species in Brachycentrus.

Brachycentrus appalachia is a species of humpless casemaker caddisfly in the family Brachycentridae. It is found in North America.

Conoesucidae is a family of caddisflies in the order Trichoptera. There are about 12 genera and more than 40 described species in Conoesucidae.

Diplectrona modesta is a species of netspinning caddisfly in the family Hydropsychidae. It is found in North America.

Dipseudopsidae is a family of caddisflies in the order Trichoptera. There are about 6 genera and at least 110 described species in Dipseudopsidae.

Glyphotaelius is a genus of insect belonging to the family Limnephilidae.

Glyphotaelius pellucidus is a species of insect belonging to the family Limnephilidae.

Hydropsyche betteni, the Common Netspinner, is a species of netspinning caddisfly in the family Hydropsychidae. It is found in North America.

Hydropsyche rossi is a species of netspinning caddisfly in the family Hydropsychidae. It is found in North America.

Hydropsyche venularis is a species of netspinning caddisflies in the family Hydropsychidae. It is found in North America.

The Hydropsychoidea are a superfamily of caddisflies.

Lype diversa is a species of net tube caddisfly in the family Psychomyiidae. It is found in North America.

Macrostemum zebratum, the zebra caddisfly, is a species of netspinning caddisfly in the family Hydropsychidae. It is found in North America.

Nectopsyche albida is a species of long-horned caddisfly in the family Leptoceridae. It is found in North America.

Nectopsyche exquisita is a species of long-horned caddisfly in the family Leptoceridae. It is found in North America.

Neophylax mitchelli is a species of caddisfly in the family Thremmatidae. It is found in North America.

Neophylax splendens is a species of caddisfly in the family Thremmatidae. It is found in North America.

Neureclipsis bimaculata,a species of caddisfly (Trichoptera), is a Holarctic species. Distributed from Alaska, across northern america and throughout Northern Europe.

Odontocerum is a genus of mortarjoint casemakers in the family Odontoceridae. There are at least three described species in Odontocerum.

Oeconesidae is a family of caddisflies in the order Trichoptera. There are about 6 genera and 19 described species in Oeconesidae, found mainly in New Zealand. A single species, Tascuna ignota, is found in Tasmania.

The Philopotamoidea are a superfamily level taxon of the order Trichoptera which contains two caddisfly families.
Philopotamus montanus, common name yellow spotted sedge, is a species of caddisfly belonging to the family Philopotamidae.

The Polycentropodidae are a family of trumpet-net and tube-making caddisflies. There are at least 30 genera and 720 described species in Polycentropodidae. The type genus for Polycentropodidae is Polycentropus J. Curtis, 1835.

Polycentropus is a genus of tube maker caddisflies in the family Polycentropodidae. There are more than 190 described species in Polycentropus.

Ptilostomis ocellifera is a species of giant casemaker in the family Phryganeidae. It is found in North America.

Rhyacophila carolina is a species of free-living caddisfly in the family Rhyacophilidae. It is found in North America.

Rhyacophila fuscula is a species of free-living caddisfly in the family Rhyacophilidae. It is found in North America.

Rhyacophila grandis is a species of free-living caddisfly in the family Rhyacophilidae. It is found in North America.

Semblis phalaenoides, the spotted caddis fly, is a species of caddisfly in the Phryganeidae family. It is found in Fennoscandia, Poland, the Baltic region, Belarus and Russia.

Tinodes is a genus of caddisflies belonging to the family Psychomyiidae.