Acrothinium is a genus of leaf beetles in the subfamily Eumolpinae. It contains three species, which are distributed in East Asia.
Species Acrothinium cupricolle Jacoby, 1888 – East China (Fujian, Jiangxi, Zhejiang) Acrothinium cyaneum Chen, 1940 – South China (Hainan) Acrothinium gaschkevitchii (Motschulsky, 1861) Acrothinium gaschkevitchii gaschkevitchii (Motschulsky, 1861) – East China (Fujian, Jiangxi, Zhejiang), Taiwan, Japan, South Korea Acrothinium gaschkevitchii matsuii Nakane, 1956 – Japan (Okinoerabu) Acrothinium gaschkevitchii okinawense Nakane, 1985 – Japan (Okinawa) Acrothinium gaschkevitchii shirakii Nakane, 1956 – Japan (Amami Ōshima, Okinawa) Acrothinium gaschkevitchii tokaraense Nakane, 1956 – Japan (Tokara Islands)
Synonyms: Acrothinium hirsutum Tan & Wang, 2005: moved to Heterotrichus Acrothinium piffli Mandl, 1965: synonym of Colasposoma ornatum Jacoby, 1881 Acrothinium violaceum Jacoby, 1889: synonym of Heterotrichus balyi Chapuis, 1874
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