Species that contain: Acanthophthalmus and shelfordii [ 3 ] records

borneensis, Acanthophthalmus Boulenger [G. A.] 1894:251 [Annals and Magazine of Natural History (Series 6) v. 13 (no. 75) (art. 26); ref. 535] Baram River, Sarawak state, Borneo, East Malaysia. Syntypes: (several) BMNH 1889.7.31.14 (1), MNHN 1894-0018 (1). Type catalog: Bertin & Estève 1948:91 [ref. 19574]. •Valid as Pangio borneensis (Boulenger 1894) -- (Kottelat et al. 1993:60 [ref. 23448]). •Questionably the same as Pangio shelfordii (Popta 1903) -- (Kottelat & Lim 1993:240 [ref. 21437], Kottelat & Lim 1996:237 [ref. 23210]). •Questionably the same as Pangio agma (Burridge 1992) -- (Kottelat 2012:37 [ref. 32367], Kottelat 2013:182 [ref. 32989]). Current status: Uncertain as Pangio agma (Burridge 1992). Cobitidae. Distribution: Borneo. Habitat: freshwater.

muraeniformis, Acanthophthalmus (Cobitophis) de Beaufort [L. F.] 1933:32 [Bulletin of the Raffles Museum No. 8; ref. 12381] Thomson Road, 3rd mile, Singapore. Syntypes: (6, orig. Raffles Mus. F.739-744) CAS-SU 32602 (1) Malaya, ZMA 103185 (3), ZRC 1052 (2). Type catalog: Böhlke 1953:39 [ref. 12291], Alfred 1970:70 [ref. 23931]. •Synonym of Pangio shelfordii (Popta 1903) -- (Kottelat & Lim 1993:240 [ref. 21437]). •Valid as Pangio muraeniformis (de Beaufort 1933) -- (Lim et al. 1990:43 [ref. 16753], Doi 1997:15 [ref. 22832], Kottelat 2012:39 [ref. 32367], Kottelat 2013:183 [ref. 32989], Ng et al. 2019:520 [ref. 36606]). Current status: Valid as Pangio muraeniformis (de Beaufort 1933). Cobitidae. Distribution: Malaya (Malaysia), Singapore. Habitat: freshwater.

shelfordii, Acanthophthalmus Popta [C. M. L.] 1903:231, Fig. [Notes from the Leyden Museum v. 23 (no. 4) (art. 33) (for Oct. 1901); ref. 15039] Sarawak River near Kuching, Sarawak state, Borneo, East Malaysia. Holotype (unique): RMNH 7661. •Valid as Acantophthalmus shelfordii Popta 1903 -- (Roberts 1989:98 [ref. 6439] as shelfordi). •Valid as Pangio shelfordii (Popta 1903) -- (Kottelat et al. 1993:61 [ref. 23448], Kottelat & Lim 1993:240 [ref. 21437], Kottelat & Lim 1996:238 [ref. 23210], Doi 1997:15 [ref. 22832], Ng & Tan 1999:357 [ref. 24159], Kottelat & Widjanarti 2005:159 [ref. 28284], Tan & Kottelat 2009:58 [ref. 30261], Kottelat 2012:40 [ref. 32367], Kottelat 2013:184 [ref. 32989]). Current status: Valid as Pangio shelfordii (Popta 1903). Cobitidae. Distribution: Asia. Habitat: freshwater.