Species that contain: Macrognathus and armatus [ 6 ] records

armatus, Macrognathus Lacepède [B. G. E.] 1800:283, 286 [Histoire naturelle des poissons (Lacepède) v. 2; ref. 2709] Locality unknown. No types known. Also appeared in Sonnini 1803:153 [ref. 30473]. •Valid as Mastacembelus armatus (Lacepède 1800) -- (Shrestha 1978:41 [ref. 15970], Coad 1981:17 [ref. 22348], Travers 1984:143 [ref. 5147], Feng in Kuang et al. 1986:326 [ref. 26639], Roberts 1986:104 [ref. 5802], Ataur Rahman 1989:262 [ref. 24860], Zheng 1989:371 [ref. 21202], Pethiyagoda 1991:291 [ref. 20075], Talwar & Jhingran 1991:1031 [ref. 20764], Zhong in Pan et al. 1991:519 [ref. 23876], Indra 1994:426 [ref. 24015], Coad 1995:32 [ref. 23608], Sen 1995:597 [ref. 23778], Zhu 1995:187 [ref. 25213], Rainboth 1996:180 [ref. 22772], Zacharias et al. 1996:41 [ref. 25526], Banik & Choudhury 1996:580 [ref. 24736], Kottelat 1998:117 [ref. 23436], Manimekalan 1998:442 [ref. 24989], Kullander et al. 1999:152 [ref. 23689], Rema Devi & Raghunathan 1999:160 [ref. 24759], Rema Devi et al. 1999:164 [ref. 24758], Menon 1999:303 [ref. 24904], Rafique 2000:327 [ref. 25220], Mirza 2000:356 [ref. 25207], Raju Thomas et al. 2000:444 [ref. 25319], Karmakar 2000:35 [ref. 25662], Kottelat 2001:63 [ref. 25482], Arunachalam et al. 2001:129 [ref. 25692], Kottelat 2001:149 [ref. 25780], Raju Thomas et al. 2002:51 [ref. 26359], Rafique et al. 2003:98 [ref. 27173], Mirza 2003:25 [ref. 27265], Yadav 2003:23 [ref. 27711], Ataur Rahman 2003:286 [ref. 31338], Shrestha 2008:211 [ref. 29923], Britz 2007:257 [ref. 29343], Yang & Zhou 2011:325 [ref. 31298], Conway et al. 2011:1755 [ref. 31594], Ahmed et al. 2013:287 [ref. 32872], Gurung et al. 2013:4884 [ref. 32969], Plamoottil & Abraham 2013:9 [ref. 33148], Kottelat 2013:312 [ref. 32989], Plamoottil & Abraham 2014:51 [ref. 33147], Plamoottil & Abraham 2014:102 [ref. 33317], Kottelat 2015:49 [ref. 33971], Zhang et al. 2016:192 [ref. 34477], Narasimhaiah et al. 2016:69 [ref. 34975] as aramatus, Arunkumar & Manimekalan 2018:1739 [ref. 36172], Suresh et al. 2018:171 [ref. 36495], Vu et al. 2019:150 [ref. 37811], Duong et al. 2020:72 [ref. 37886], Taki et al. 2021:350 [ref. 39830], Kosygin et al. 2022:671 [ref. 40736], Shangningam & Kosygin 2022:61 [ref. 39587], Tudu et al. 2022:43 [ref. 40484], Çiçek et al. 2023:44 [ref. 40326]). Current status: Valid as Mastacembelus armatus (Lacepède 1800). Mastacembelidae. Distribution: South Asia, Southeast Asia: Afghanistan, Pakistan, India and Myanmar to Vietnam and Yunnan (China), and ?Taiwan. Habitat: freshwater.

armatus, Mastacembelus Sykes [W. H.] 1839:158 [Proceedings of the Zoological Society of London 1838 (pt 6) (for 27 Nov. 1838); ref. 18720] Deccan, India. No types known. Appeared first as above, then in Sykes 1839:55 [ref. 4306]; more complete treatment in Sykes 1841:350, Pl. 60 (fig. 2) [ref. 18868]. Subjectively invalid; secondarily preoccupied by Macrognathus armatus Lacepède 1800. •Questionably a synonym of Mastacembelus armatus (Lacepède 1800) -- (Kottelat 2013:313 [ref. 32989]). 2°Homonym. Current status: Synonym of Mastacembelus armatus (Lacepède 1800). Mastacembelidae. Habitat: freshwater.

caudatus, Macrognathus McClelland [J.] 1842:586 [Calcutta Journal of Natural History v. 2 (no. 8); ref. 2926] Afghanistan [Questioned]. Syntypes: BMNH 1860.3.19.918 (1?). •Synonym of Mastacembelus armatus (Lacepède 1800) -- (Menon 1999:303 [ref. 24904], Kottelat 2013:313 [ref. 32989]). •Synonym of Mastacembelus mastacembelus (Banks & Solander 1794) -- (Çiçek et al. 2024:323 [ref. 40789]). Current status: Synonym of Mastacembelus armatus (Lacepède 1800). Mastacembelidae. Habitat: freshwater.

hamiltonii, Macrognathus McClelland [J.] 1843:393 [Calcutta Journal of Natural History v. 4 (no. 4) (for 1844); ref. 2927] India, rivers in Bengal. No types known. •Synonym of Mastacembelus armatus (Lacepède 1800) -- (Menon 1999:303 [ref. 24904], Kottelat 2013:313 [ref. 32989]). Current status: Synonym of Mastacembelus armatus (Lacepède 1800). Mastacembelidae. Habitat: freshwater.

malabaricus, Mastacembelus Jerdon [T. C.] 1849:147 [Madras Journal of Literature and Science v. 15 (pt 1) (no. 34) (art. 2); ref. 2346] Malabar [northern parts of Kerala]. India. No types known. •Synonym of Mastacembelus armatus (Lacepède 1800) -- (Pethiyagoda et al. 2008:44 [ref. 30097], Kottelat 2013:313 [ref. 32989]). •Valid as Macrognathus malabaricus (Jerdon 1849) -- (Rema Devi et al. 1996:143 [ref. 24021], Menon 1999:302 [ref. 24904]). •Valid as Mastacembelus malabaricus Jerdon 1849 -- (Plamoottil & Abraham 2013:6 [ref. 33148], Plamoottil & Abraham 2013:102 [ref. 33317], Plamoottil & Abraham 2014:51 [ref. 33147]). Current status: Valid as Mastacembelus malabaricus Jerdon 1849. Mastacembelidae. Distribution: Kerala, India. Habitat: freshwater.

undulatus, Macrognathus McClelland [J.] 1843:398, Pl. 22 (fig. 1) [Calcutta Journal of Natural History v. 4 (no. 4) (for 1844); ref. 2927] Day River, Red River delta, Hoa Lu district, Ninh Binh Province, Vietnam [Chusan Island, China]. Neotype: ANSP 210057-5080. Neotype designated by Endruweit 2024:109 [ref. 41040]. •Synonym of Mastacembelus armatus (Lacepède 1800) -- (Zheng 1989:371 [ref. 21202], Menon 1999:303 [ref. 24904]). •See Kottelat 2001:63 [ref. 25482]. •Valid as Mastacembelus undulatus (McClelland 1843) -- (Britz 2007:257 [ref. 29343], Kottelat 2013:313 [ref. 32989], Endruweit 2024:109 [ref. 41040]). Current status: Valid as Mastacembelus undulatus (McClelland 1843). Mastacembelidae. Distribution: Southeast Asia: Red River and Pearl River basins, southern China and Vietnam. Habitat: freshwater.