Parametriocnemus Goetghebuer, 1932

Namayandeh, Armin, Hudson, Patrick L., Bogan, Daniel L. & Hudson, John P., 2024, Chironomidae (Diptera: Insecta) of Alaska, USA, with descriptions of new species and a checklist, Zootaxa 5511 (1), pp. 1-95 : 68

Parametriocnemus Goetghebuer, 1932

The larvae of Parametriocnemus inhabit springs and relatively fast-flowing, cold streams and rivers (Andersen et al. 2013). Webb et al. (2022) DNA barcoded Parametriocnemus boreoalpinus Gouin & Thienemann, 1942 larvae from the Hanagita River in the Wrangell-St. Elias National Park and Preserve. We found adults of Parametriocnemus hamatus (Johannsen, 1934) in a Margaret Creek tributary on Revillagigedo Island in late May and a small first-order stream on Lena Point north of Juneau in mid-July. We collected Parametriocnemus lundbecki (Johannsen, 1905) larvae from the Alsek River and Little Sheep Creek in Southeast Alaska, the East Fork Moose River on the Kenai Peninsula, Little Meadow Creek from the Mat-Su Valley, and Chester Creek in Anchorage. We also collected males and pupae from Otter Creek near Anchorage in early June and pupae and larvae from Little Rabbit Creek in late May. We collected adults of Parametriocnemus vespertinus Saether, 1969 from a small creek on the west side of the Mendenhall Glacier in late July. These records for P. hamatus , P. lundbecki and P. vespertinus all represent new faunistic records for Alaska. Parametriocnemus larvae have been collected from the Indian River in Sitka, a tributary to the South Fork Koktuli River and other streams in the Bristol Bay region, Little Sheep Creek in Juneau ( Arctos 2023), Prince of Wales Island ( Carlson 1997) and the Kuskokwim River ( Hayford et al. 2014). We have encountered Parametriocnemus larvae commonly in streams throughout Southeastern, Southcoastal, and Southwestern Alaska.