Chironomidae (Diptera: Insecta) of Alaska, USA, with descriptions of new species and a checklist Author Namayandeh, Armin 0000-0003-2136-0497 Department of Environmental and Life Sciences, Trent University, 1600 West Bank Drive, Peterborough, ON, Canada arminnamayandeh @ trentu. ca, a. namayan @ taxanama. org; https: // orcid. org / 0000 - 0003 - 2136 - 0497 arminnamayandeh@trentu.ca Author Hudson, Patrick L. 0000-0002-7646-443X 5597 New Meadow Drive, Ypsilanti, MI 48197 patrick _ hudson @ sbcglobal. net; https: // orcid. org / 0000 - 0002 - 7646 - 443 X patrick_hudson@sbcglobal.net Author Bogan, Daniel L. 0000-0001-5588-1595 Alaska Center for Conservation Science, University of Alaska Anchorage, 3211 Providence Drive, Beatrice McDonald Hall, Anchorage, Alaska dlbogan @ alaska. edu; https: // orcid. org / 0000 - 0001 - 5588 - 1595 dlbogan@alaska.edu Author Hudson, John P. 0000-0003-2136-0497 Department of Environmental and Life Sciences, Trent University, 1600 West Bank Drive, Peterborough, ON, Canada arminnamayandeh @ trentu. ca, a. namayan @ taxanama. org; https: // orcid. org / 0000 - 0003 - 2136 - 0497 & 16455 Point Lena Loop Rd., Juneau, AK 99801 Corresponding author & Department of Environmental and Life Sciences, Trent University, 1600 West Bank Drive, Peterborough, ON, Canada arminnamayandeh @ trentu. ca, a. namayan @ taxanama. org; https: // orcid. org / 0000 - 0003 - 2136 - 0497 arminnamayandeh@trentu.ca text Zootaxa 2024 2024-09-17 5511 1 1 95 http://dx.doi.org/10.11646/zootaxa.5511.1.1 journal article 10.11646/zootaxa.5511.1.1 1175-5334 13848177 8DDA1158-1904-4097-A04F-DB9EC7D22812 Potthastia Kieffer, 1922 Larvae of this genus’s two known designated species groups are quite different morphologically. However, Serra-Tosio (1968) placed the species from both groups in the genus Potthastia . Larvae of Potthastia gaedi group have been collected in the Kuskokwim River ( Hayford et al 2014 ). We collected P. gaedii (Meigen, 1838) larvae in Kanuti National Wildlife Refuge in the South Fork of the Koyukuk and Kanuti-Kilolitna Rivers. We also collected P. gaedii larvae in Southcoastal Alaska , including Chester Creek in Anchorage, Cottonwood, Meadow, and Little Meadow Creeks in the Mat-Su Valley, and Deep, Soldotna Creeks, and Ninilchik River on the Kenai Peninsula. We collected larvae of P. gaedii in many southwestern Central Alaskan streams, including tributaries to the South Fork Koktuli River, the Little Mulchatna River, Victoria and Steambath Creeks. We found larvae of Potthastia longimanus Kieffer, 1922 in two small lakes in the Alaska Arctic Coastal Plain south of Teshekpuk Lake, in Southeast Alaska from the East Alsek River, an unnamed lake in Glacier Bay National Park and Preserve, and from a quarry pond in Gustavus; in southwestern Central Alaska in Victoria and Kaskanak Creeks, and the Little Mulchatna River; in Central Alaska in a slough of the Kandik River in Yukon-Charley Rivers National Preserve; and in Southcoastal Alaska in Chester Creek in Anchorage.