Fast flowing streams, on the other hand, allow more water to pass over the cuticle of the larva, again resulting in the larva utilizing more dissolved oxygen. Within streams, Glossosomatid larvae can be found clinging to submerged logs and rocks with algae present. They scrap, graze, and consume algae, in addition to other fine particulate matter. A normal larva can live months to years within a single streams (because the cold conditions increase longevity) before pupating. Larvae chew off the silk on the ventral part of the case and fasten it, using silk, to a rock when ready to pupate. Inside of the case, the larva will spin a brown, silken cocoon where it will pupate. This life stage last for about month, unless they are in diapause. The pupae are exarate and decticous, this means that the pupa are capable of using their mandibles. Chewing the silk holding the case to the rock, the pupa will then float to the surface. Inside is a pharate (young, unsclerotized) adult that will emerge and undergo sclerotization. Adults normally do not feed, but some species are known to feed on nectar. They can be found flying around at night, because they are nocturnal, and can be caught using light traps. Otherwise, adults can be found during the day inside of vegetation where they remain quiescent until night. After mating, eggs are lain in a gelatinous mass under rocks, on the water surface, or on floating objects in a stream. This gelatinous mass helps to protect the eggs by ensuring they do not desiccate. There is much debate over the placement of suborders within Trichoptera, the formation of the family Ryacophiloidea, as well as the relationship between the families within Ryacophiloidea. Some suggest that Spicipalpia should be integrated into Integripalpia. Current research into the phylogeny of Trichoptera suggest that Spicipalpia is weakly monophyletic when using certain genetic and morphological characters, and is possibly paraphyletic. For the most part, Glossosomatids are not incredibly important to the economy. They are mostly used as bait for fishermen, but their more important use requires their significance as bioindicators. Glossomatids are incredibly susceptible to water pollution both at the family-level as well as at the genus-level.