Filixungulia, a small genus within the subfamily Allantinae (Symphyta: Tenthredinidae), consists of three species distributed only in Northern China: F. alboclypea Wei, 1997; F. crassitarsata Wei, 1997; F. cylindrica Wei, 2003. It is close to Asiemphytus Malaise and Macremphytus MacGillivray but is separated by the following characteristics: claws simple and very slender; basal lobe and inner tooth absent. Up to date, Filixungulia has not yet been recorded out of China. As a result of the present study, the genus Filixungulia is newly recognized from South Korea with two species, F. alboclypea and F. cylindrica. This discovery extends the range of the genus Filixungulia, which was previously known as a Chinese endemic genus. Also, a key, diagnosis and photographs of each species are provided.