The male of Xysticus brevidentatus Wunderlich 1995 was originally described from Dubrovnik in Croatia, but females have remained unknown. During a revision of museum material in Vienna further specimens including both males and associated females from Albania, Italy and Yugoslavia were discovered. The morphology of the male pedipalp allows the placement of X. brevidentatus in the cristatus group which contains, among others, X. cristatus (Clerck 1757), X. audax (Schrank 1803), X. macedonicus Šilhavý 1944 and X. pseudocristatus Azarkina & Logunov 2001. Detailed analyses of the females showed that the shape of the female epigyne and vulva is consistent with the general scheme of the cristatus group and that the specimens can, due to a number of distinctive characters, be regarded as the females of X. brevidentatus.