| abstract | A new species of oribatid mite of the genus Pergalumna (Oribatida, Galumnidae) is described rom litter and soil materials in Sumatra, Indonesia. Pergalumna paraindistincta sp.n. is morphologically most similar to P. indistincta Ermilov & Anichkin, 2011, P. peritrichosa Mahunka, 1995 and P. sura Balogh, 1997; however, the new species differs from P. indistincta by the smalle body size, presence of long adanal setae ad1, and large, single median pore in females and males; from P. pertrichosa by the smaller body size, presence of three pairs of notogastral porose areas, elongated A1 and minute anal setae, from P. sura by the prsence of strong adanal setae ad1, large, single median pore in females and males, and shorter bothridial setae. Furthermore, Pergalumna hawaiiensis hawaiiensis (Jacot, 1934) and P. panayensis Ermilov & Corpuz-Raros, 2015 are recorded for the first time in the Indonesian fauna. An identification key to the known species of Pergalumna in the Oriental region is given. |