Family Microstomatidae Bleeker 1859

Microstomatini Bleeker 1859d:XXX [ref. 371] (cohors) Microstoma [stem changed to Microstom- by Gill 1873:789 [ref. 17631], confirmed by Schmidt 1918:10 [ref. 32602]; original stem Microstomatconfirmed by Nelson 1976:105 [ref. 32838], by Kawaguchi & Butler 1984:1 [ref. 17434], by Nelson 2006:191 [ref. 32486] and by Fierstine, Huddleston & Takeuchi 2012:38; not Microstomini Cooper & Chapleau 1998]

Xenophthalmichthyidae Berg 1940:89 [242, 429] [ref. 5049] (family) Xenophthalmichthys

Prososcopidae Whitley 1970:245 [ref. 6601] (family) Prososcopa

Nanseniini Johnson & Patterson in Stiassny, Parenti & Johnson 1996:308, 309 [ref. 23450] (tribe) Nansenia