Species that contain: Pseudomystus and siamensis [ 3 ] records

albicollaris, Leiocassis Fowler [H. W.] 1934:337, Fig. 2 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 86; ref. 1418] Bangkok, Thailand. Holotype (unique): ANSP 60178. Type catalog: Böhlke 1984:25 [ref. 13621], Ferraris 2007:104 [ref. 29155]. •Questionably a synonym of Leiocasis siamensis Regan 1913 -- (Burgess 1989:70 [ref. 12860]). •Valid as Pseudomystus albivollaris (Fowler 1934), but possibly a synonym of Pseudomystus siamensis (Regan 1913) -- (Ng & Rachmatika 1999:176, 178 [ref. 23964]). •Synonym of Pseudomystus siamensis (Regan 1913) -- (Kottelat 2001:125 [ref. 25780], Ng & Lim 2005:16 [ref. 28081], Ferraris 2007:104 [ref. 29155], Kottelat 2013:265 [ref. 32989]). Current status: Synonym of Pseudomystus siamensis (Regan 1913). Bagridae. Habitat: freshwater.

bicolor, Leiocassis Fowler [H. W.] 1934:95, Fig. 43 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 86; ref. 1417] Chieng Mai [or Mae Nam Ping], northern Thailand. Holotype: ANSP 59284. Paratypes: ANSP 59285-89 (5). Additional material (12). Type catalog: Böhlke 1984:25 [ref. 13621], Ferraris 2007:104 [ref. 29155]. •Valid as Leiocassis bicolor Fowler 1934 -- (Burgess 1989:70 [ref. 12860]). •Valid as Pseudomystus bicolor (Fowler 1934) -- (Mo 1991:140 [ref. 19952]). •Valid as Pseudomystus bicolor (Fowler 1934), but possibly a synonym of Pseudomystus siamensis (Regan 1913) -- (Ng & Rachmatika 1999:176, 178 [ref. 23964]). •Synonym of Pseudomystus siamensis (Regan 1913) -- (Kottelat 2001:125 [ref. 25780], Ng & Lim 2005:16 [ref. 28081], Ferraris 2007:104 [ref. 29155], Kottelat 2013:265 [ref. 32989]). Current status: Synonym of Pseudomystus siamensis (Regan 1913). Bagridae. Habitat: freshwater.

siamensis, Liocassis Regan [C. T.] 1913:550 [Annals and Magazine of Natural History (Series 8) v. 11 (no. 66); ref. 14980] Bangpakong River, Chao Phraya basin, Thailand. Holotype (unique): BMNH 1897.10.8.126. Type catalog: Ferraris 2007:104 [ref. 29155]. Original genus should have been Leiocassis. •Valid as Leiocassis siamensis Regan 1913 -- (Burgess 1989:71 [ref. 12860], Rainboth 1996:140 [ref. 22772]). •Valid as Pseudomystus siamensis (Regan 1913) -- (Mo 1991:140 [ref. 19952], Kottelat 1998:101 [ref. 23436], Ng & Rachmatika 1999:176 [ref. 23964], Freyhof et al. 2000:96 [ref. 25184], Kottelat 2001:125 [ref. 25780], Ng & Siebert 2005:6 [ref. 28064], Ng & Lim 2005:16 [ref. 28081], Ng & Freyhof 2005:748 [ref. 28480], Ferraris 2007:104 [ref. 29155], Kim & Ng 2008:46 [ref. 29456], Ng 2008:98 [ref. 29540], Kottelat 2013:265 [ref. 32989], Kottelat 2015:46 [ref. 33971], Taki et al. 2021:282 [ref. 39830]). Current status: Valid as Pseudomystus siamensis (Regan 1913). Bagridae. Distribution: Southeast Asia: Mekong and Chao Phraya River basins, Thailand, Laos, Cambodia and Vietnam. Habitat: freshwater.