Journal ArticleAdditions to the genus Rhyacopsyche Müller, 1879 (Trichoptera, Hydroptilidae) in EcuadorThomson, Robin E [University of Minnesota, St. Paul, United States of America] (ORCID:0000000258832040); Ríos-Touma, Blanca [Universidad de Las Américas, Quito, Ecuador] (ORCID:0000000239210908); Holzenthal, Ralph W [University of Minnesota, St. Paul, United States of America] (ORCID:0000000318536340)<p>Prior to this publication, six species of microcaddisflies in the genus<italic>Rhyacopsyche</italic>(Trichoptera: Hydroptilidae) had been recorded from Ecuador. Herein, we describe five new species:<italic>Rhyacopsyche abdita</italic><bold>sp. nov.</bold>,<italic>Rhyacopsyche bellavista</italic><bold>sp. nov.</bold>,<italic>Rhyacopsyche decouxi</italic><bold>sp. nov.</bold>,<italic>Rhyacopsyche patula</italic><bold>sp. nov.</bold>, and<italic>Rhyacopsyche tumida</italic><bold>sp. nov.</bold>Illustrations of male genitalia are provided with each description. This work brings the total number of<italic>Rhyacopsyche</italic>species in Ecuador to eleven, and the world total to 37.</p>Proceedings of the 18th International Symposium on Trichoptera2025-12-1010666289ZooKeys1263531 to 5431313-2989https://doi.org/10.3897/zookeys.1263.1480842143776National Science Foundation