Stilocladius kiethsomersi, Namayandeh & Hudson & Bogan & Hudson, 2024

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 : 73

Stilocladius Rossaro, 1979

We collected an adult male of Stilocladius kurobekeyakia (Sasa & Okazawa, 1992) from the South Fork Chester Creek in mid-July in the Anchorage area ( Fig. 11B–C ). This is a new faunistic record for the Nearctic. We collected two males of the new species Stilocladius kiethsomersi sp. nov. from around Montana Creek in Juneau in mid-August. The report of the larvae of Stilocladius montanus (AWQMS 2005) from streams in the Arctic Coastal Plain turned out to be an unknown Parakieferriella species. Unknown larvae of Stilocladius have been reported from Indian River Basin, tributaries to the Stuyahok and Koktuli Rivers in the Arctos database (2023). We also collected larvae from Wasilla Creek in the Mat-Su Valley. Other reports of larvae come from Hayford et al. (2014), reporting a possible new species of Stilocladius from the Kuskokwim River. Larvae of species in this genus are small and associated with springs and small streams (Andersen et al. 2013).

Figures

FIGURE 11. The new Nearctic faunistic records of Alaskan Chironomidae II; Parorthocladius lazovskiensis Makarchenko & Makarchenko, 2015 male (A); Stilocladius kurobekeyakia (Sasa and Okazawa, 1992) male (B–C); Thienemanniella acuticornis (Kieffer, 1912) larva (D–F); Thienemanniella chuzeduodecima Sasa, 1984 male (H–I); Chironomus sp. 5X male (J); Stempellinella depilisa Guo & Wang, 2007 male (K–M). A. hypopygium. B. hypopygium. C. wing. D. abdominal segments. E. antenna. F. mentum. G. posterior parapod subbasal setae. H. antenna. I. hypopygium. J. hypopygium. K. hypopygium. L. anal point. M. wing. Scale bars are 50 µm.