Alaskacladius gen. nov., (Diptera: Chironomidae), a unique new orthoclad from Alaska Author Namayandeh, Armin 0000-0003-2136-0497 Department of Environmental and Life Sciences, Trent University, 1600 West Bank Drive, Peterborough, ON, Canada a. namayan @ taxanama. com, arminnamayandeh @ trentu. ca; https: // orcid. org / 0000 - 0003 - 2136 - 0497 & Department of Physiology, School of Medicine, Wayne State University, Detroit, MI 48201, USA arminnamayandeh@trentu.ca Author Hudson, Patrick L. 5597 New Meadow Drive, Ypsilanti, MI 48197, USA Author Ghaderi, Edris Department of Fisheries Sciences, Faculty of Natural Resources, University of Kurdistan, Sanandaj, Iran & Department of Fisheries and Aquatic Ecology, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran Author Vasquez, Adrian A. Department of Physiology, School of Medicine, Wayne State University, Detroit, MI 48201, USA Author Ram, Jeffrey L. Department of Physiology, School of Medicine, Wayne State University, Detroit, MI 48201, USA text Zootaxa 2023 2023-08-10 5325 4 571 581 http://dx.doi.org/10.11646/zootaxa.5325.4.7 journal article 10.11646/zootaxa.5325.4.7 1175-5326 8243761 F93BB79F-F99A-46FA-9E85-BC5112526895 A key to the adult male of some genera of Orthocladiinae 1. Antenna with a stiff and straight apical seta. Eyes naked. Acrostichals present or absent. If present long, starting in front of antepronotum. Squama of the wing setose; Cu 1 curved. Pulvilli is present and well-developed......................... 2 - Not with the above combination of characters.................................................... Not keyed here 2. Acrostichals present or absent. Preepisternum sometimes with seta(e). Pseudospurs present or sometimes absent. Gonostylus with outer corner...................................................................................... 3 - Acrostichals present. Preepisternum without seta. Pseudospurs absent. Gonostylus without outer corner................. 5 3. Acrostichals present. Inferior volsella mainly prominent, triangular, or trapezoid shape; if reduced, never digitiform....... 4 - Acrostichals absent. Inferior volsella small and digitiform................................. Parachaetocladius Wülker 4. Virga absent. Pseudospurs present. Inferior volsella, mainly triangular or occasionally reduced..... Georthocladius Strenzke - Virga present. Pseudospurs absent. Inferior volsella trapezoid shape ( Figs. 1D & 3A )............. Alaskacladius gen. nov. 5. Anal point well-developed and long; bearing strong lamellate setae......................... Doithrix Saether & Sublette - Anal point triangular or occasionally absent, never long; bearing moderately strong setae but never lamellate....................................................................................... Pseudorthocladius Goetghebuer