The crab spider Xysticus brevidentatusWunderlich, 1995 is one of the most rarely recorded thomisids in Europe. A new record of this species from Bosnia and Herzegovina, the northernmost of its currently known distribution, is presented together with first photographic illustrations of both adult sexes and the diagnostic genital characteristics. The paper also gives information on the habitat for the first time and discusses the known records of the species on the Balkan Peninsula and in southern Italy. The latter record needs further verification due to the recently revealed presence of the highly similar Xysticus macedonicus Šilhavý, 1944 in the same region.