AcymatopusAcymatopus is a genus of flies in the family Dolichopodidae. It is distributed in Japan and China, and lives exclusively on marine coasts. It is similar in appearance to the genus Conchopus, which is also found in marine coasts.SpeciesThere are six known species in the genus:Acymatopus femoralis Takagi, 1965 – Japan Acymatopus longisetosus Takagi, 1965 – Japan Acymatopus major Takagi, 1965 – Japan Acymatopus minor Takagi, 1965 – Japan Acymatopus oxycercus Masunaga, Saigusa & Yang, 2005 – Japan Acymatopus takeishii Masunaga, Saigusa & Yang, 2005 – Northeast China