Unionicola (Hexatax) affinis (Piersig, 1906)

Material examined. 1/0/0, rice field, Yasothon Province, Thailand, 15° 44.688ʹ N, 104° 13.244ʹ E, 24-x-2010; 3/0/0, Nong Chang Yai Reservoir, Ubon Ratchathani Province, 15° 23.874ʹ N, 104° 49.756ʹ E, 25-x-2010 ; 0/1/0, Phan Reservoir, Udon Thani Province, Thailand, 17° 50.052ʹ N, 103° 04.356ʹ E, 31-i-2011 ; 0/1/0, one female, Huay Nam Kham Noi rivulet, Yasothon Province, Thailand, 15° 48.779ʹ N, 104° 09.415ʹ E, 10-ii-2011 ; 0/2/0, Huay Ton rivulet, Chaiyaphum Province, 12-ii-2011 ; 4/2/0, swamp Kaeng Leang Chan, Maha Sarakham Province, 16° 11.469ʹ N, 103° 12.413ʹ E, 2-xi-2016 .

Remarks. The species is widespread in the Oriental region. However, it is reported here for the first time from Thailand.