Tvetenia Kieffer, 1922

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 : 74

Tvetenia Kieffer, 1922

Tilley (1979) reported larvae of Tvetenia bavarica group from the Brooks Range in the Northern bioregion. Brabets & Ourso (2013) collected larvae of this group from Denali National Park. Bode (1983) placed Tvetenia paucunca (Saether, 1969) and Tvetenia tshernovskii (Pankratova, 1968) in this group. We collected T. paucunca larvae from a first-order stream in Denali National Park, the Kaskanak River in Southwestern Alaska, and Little Rabbit Creek in the Anchorage area. We collected larvae of T. tskernovskii in the Yukon River, the Little Mulchatna River west of Lake Clark National Park, East Fork of the Moose River on the Kenai Peninsula, Caswell, and Little Meadow Creeks in the Mat-Su Valley, and South Fork Campbell Creek in Anchorage. Webb et al. (2022) collected Tvetenia duodenaria Kieffer, 1922 from a second-order stream in Wrangell-St. Elias National Park. We collected emerging adults of Tvetenia calvescens (Edwards, 1929) in the Anchorage area in Little Rabbit Creek in late May and Sixmile Creek in late August, suggesting multiple generations per year. Our records of T. clavescens and T. tshernovskii are new faunistic records for Alaska. Tvetenia larvae have been collected from St. Matthew Island ( Sikes et al. 2016) and the Kuskokwim River ( Hayford et al. 2014). We have also collected Tvetenia larvae from Herbert River, Fish Creek estuary and Jordan Creek in the Juneau area, East Fork Moose River on the Kenai Peninsula, Deception Creek in the Ma-Su Valley and many lakes in the Southeastern bioregion.