effrenum, Exostoma Ng [H. H.] & Vidthayanon [C.] 2014:424, Figs. 4-5 [Zootaxa 3869 (no. 4); ref. 33523] Mae Hong Son Province, Mae La Noi District, Ping Noi stream close to Doi Om Phai in Chiang Mai Province, 18°23'43"N, 98°07'56"E, Thailand. Holotype: NIFI 4955. Paratypes: NIFI 3765 (2), UMMZ 250050 (1). •Valid as Exostoma effrenum Ng & Vidthayanon 2014 -- (Lalramliana et al. 2015:64 [ref. 33867], Tamang et al. 2015:445 [ref. 34045], Chen et al. 2017:8 [ref. 35642], Ng & Kottelat 2018:68 [ref. 35794], Ng 2018:413 [ref. 35936], Luo & Chen 2020:108 [ref. 37596], Arunkumar 2020:295 [ref. 37782] as effernum). Current status: Valid as Exostoma effrenum Ng & Vidthayanon 2014. Sisoridae: Glyptosterninae. Distribution: Upper reaches of Ping River, Chao Phraya basin, Thailand. Habitat: freshwater.