Diagnosis. Achramorphidae with syconoid organization (Borojević et al. 2002b).
Scope. Five species of Achramorpha are currently accepted: A. diomediae Hôzawa, 1918; A. glacialis Jenkin, 1908; A. grandinis Jenkin, 1908; A. nivalis Jenkin, 1908 and A. truncata (Topsent, 1907). Two new species are described in this study; A. ingolfi sp. nov. and A. antarctica sp. nov.
Type species: Achramorpha nivalis Jenkin, 1908 (by subsequent designation by Dendy & Row 1913).