Female: Rostrum absent. Cephalon and 1st prosomal segment incompletely separate; 4th and 5th prosomal segments separate. Abdomen 4-segmented; genital segment symmetrical. A1 of 24 articulated segments. Exopodite of A2 incompletely 8-segmented (2nd and 3rd segments partly fused); shorter than endopodite; endopodite with 1 seta. First endopodal segment of Md without seta, second with 6 setae. Fourth endopodal segment of Mx1 without setae. Endopodite of P1 without outer lobe and basis without inner setae.
Male: unknown
Type species: Arctokonstantinus hardingi Markhaseva & Kosobokova, 2001
