Due to similarities between the adults, systematically, the Trichoptera are considered as the sister group of the order belonging to the butterflies and moths; the Lepidoptera (Bongard 2004). Their ancestral order is thought to have had a trichopteran-like adult, but the larva similar to a lepidopteran (Bongard 2004). In regards to the line leading to caddisflies, evolutionary adaptions have modified the larvae to be aquatic. Within the caddisfly families, two large, homogenous families- the Hydropsychoidea and Limnephiloidea- exist; with more primitive forms assigned a third, the Rhyacophiloidea (Bongard 2004). Those in the Limnephiloidea order contain families in which the larvae are able to construct portable cases with their silk and combinations of organic and inorganic materials (Bongard 2004, Vaughn 1985). The genus Helicopsyche, assigned to the family Helicopsychidae, belongs to the leptocerid branch of the Limnephiloidea (Bongard 2004).
Members of the Helicopsyche are unusual and distinct due to their larval case. Constructed out of sand grains, the cases superficially resemble spiraled snail shells; in a helical form (Vaughn 1985). Due to its distinct feature that is found rarely outside the family, distributions records are relatively comprehensive. With such available research and data, the current global