Annulipalpia

{{Short description|Suborder of caddisflies}}

{{Automatic taxobox

| taxon = Annulipalpia

| subdivision_ranks = Superfamilies

| subdivision =

| image =Philopotamidae Notch.jpg

| image_caption = Philopotamidae Notch.jpg

Hydropsychoidea

Philopotamoidea

}}

The Annulipalpia, also known as the "fixed-retreat makers", are a suborder of Trichoptera, the caddisflies.Glenn B. Wiggins, Larvae of the North American Caddisfly Genera (Trichoptera), 2nd. ed. (Toronto: University Press, 1996), p. 117 The name of the suborder refers to the flexible terminal segment of the adult maxillary palps, which often has many tiny rings.

The larvae construct fixed retreats in freshwater aquatic environments in which they remain stationary, waiting for food to come to them. Members of the Psychomyiidae, Ecnomidae and Xiphocentronidae families construct simple tubes of sand and other particles held together by silk and anchored to the bottom, and feed on the accumulations of silt formed when suspended material is deposited on the substrate.{{cite book |author=Wiggins, Glenn B.|title=Caddisflies: The Underwater Architects |url=https://books.google.com/books?id=M_eMBgAAQBAJ |year=2015 |publisher=University of Toronto Press |isbn=978-1-4426-5617-8 |chapter=1.3}} Some of the families are unique in spinning silken nets for filter feeding.