A new lasiosynid beetle from the Middle Jurassic of China with remarks on the systematic position of Lasiosynidae

A new beetle species, Lasiosyne laxa n. sp., is described from the Jurassic Daohugou deposits in Inner Mongolia, China. Its morphological significance and systematic position within the genus Lasiosyne Kirejtshuk et al., 2010a, b and the family Lasiosynidae are discussed. The research history of Lasiosynidae is summarized for the first time. The affiliation of Lasiosynidae to the superfamily Byrrhoidea is discussed in detail.