Parachaetocladius lenferringtoni (Diptera: Chironomidae), a new orthoclad from North America, with keys to adult males and pupae of the Nearctic Parachaetocladius (Wülker, 1959) Author William, R. Department of Entomology, University of Minnesota, 1980 Folwell Avenue, St. Paul, MN 55108, USA Author Namayandeh, Armin Department of Environmental and Life Sciences, Trent University, 1600 West Bank Drive, Peterborough, ON, Canada & Department of Physiology, School of Medicine, Wayne State University, Detroit, MI, USA, 4820 Author Hudson, Patrick L. 5597 New Meadow Drive, Ypsilanti, MI, USA, 48197 text Zootaxa 2024 2024-03-06 5419 2 245 264 http://dx.doi.org/10.11646/zootaxa.5419.2.4 journal article 10.11646/zootaxa.5419.2.4 1175-5326 10792017 2091D14E-FA61-417B-8FD9-FAA4994C0563 Genus Parachaetocladius Wülker Adults and immatures as diagnosed by Wülker (1959) , Saether & Sublette (1983) , and Namayandeh et al. (2020) , with the following corrections: Adult male without virga; the posteromedial meeting point of the gonocoxites (i.e., penis cavity) with strong sclerotization; the apex of aedeagal lobes with well-developed sclerotization appearing as lateral sclerites below sternapodeme; inferior volsella blunt, lobed, or digitiform. Pupa with sensillum coeloconica located on a low mound with the lateral antepronotal; 3 short anal macrosetae (AM) which are subequal or one AM shorter than the other 2, AM may or may not bear denticles.