The genus Lacronia Strand, 1942 is herein revised, and a maximum parsimony phylogenetic analysis of morphological characters (30 taxa, 115 characters, 2962 scorings) performed to test its monophyly. As result, made monophyletic by means the inclusion Discocyrtus boraceae B. Soares, 1942, niger Mello-Leitão, 1923 tenuis Roewer, 1917. including those species sister group s. str. inside DRMN-clade...

Three new species of Patrus Aubé, 1838 are described from China: hainanensis sp. nov. Hainan; jiangxiensis Jiangxi; shangchuanensis Guangdong. Eight / subspecies Gyrinidae recorded China for the first time: Metagyrinus vitalisi (Peschet, 1923), Orectochilus argenteolimbatus Peschet, 1923, murinus Régimbart, 1892, haemorrhous (Régimbart, 1892), marginepennis angustilimbus (Ochs, 1925) Yunnan; co...