The gnaphosid spider genus Sernokorba Kamura, 1992 is reviewed. While Sernokorba pallidipatellis (Bösenberg and Strand 1906) and Sernokorba fanjing Song, Zhu & Zhang, 2004, occur in the Far East and the Japanese archipelago, Sernokorba tescorum (Simon, 1914) is known from Europe. We here describe a fourth species, Sernokorba betyar sp. nov. (male and female) from the forest steppe vegetation in southern Hungary in Central Europe. Digital images, comparative drawings (except for S. fanjing) and a distribution map are provided for all the species, and an identification key is compiled. The cheliceral dentation as diagnostic character and its interpretation are discussed.