Arrenurus (Micruracarus) gibberifrons Piersig, 1906

Material examined. 3/0/0, Pond between Kaeng Krachan and Tha Yang, Phetchaburi Province, 12° 56.131ʹ N, 99° 48.543ʹ E, alt. 11 m a.s.l., 30-xi-2007, leg H. Smit; 1/0/0, Huay Yang Reservoir, Buiram Province, 14° 35ʹ17.1ʺ N, 102° 29ʹ 25.9ʺ E, 6-x-2010 ; 1/0/0, Nong Ya Ma Reservoir, Roi-Et Province, 16° 01.783ʹ N, 103° 40.894ʹ E, 12-ii-2011 ; 1/1/0, pond next to Science Faculty building, Mahasarakham University, 16° 14.868ʹ N, 103° 15.014ʹ E, 2-xi-2016 .

Remarks. The species is widespread species in the Oriental region. This is the first record for the fauna of Thailand.