Taxonomic reassessment of Indoartemon vietnamensis Thach, 2020, with the description of a new subspecies of I. huberi (Thach, 2016) from Vietnam

The taxonomic status of Indoartemon vietnamensis Thach, 2020 is reassessed. The morphology of I. vietnamensis falls within the intraspecific variation of I. huberi (Thach, 2016). The similarities suggest that I. vietnamensis should be treated as a junior subjective synonym of I. huberi. Furthermore, a new subspecies of the genus Indoartemon is described from Chua Chan Mountain, Dong Nai Province, Vietnam. Indoartemon huberi chuachanensis subsp. nov., has oblique-heliciform shell with axially deflected last whorl, narrow and deep umbilicus, aperture with one strong parietal lamella and one small palatal lamella, slightly enlarged columellar fold along the columellar margin.