Microstoma (Greek "small mouth") may refer to genera:
*
''Microstoma'' (fish)
*
''Microstoma'' (fungus)
* ''Microstoma'', a genus of hydrozoans in the family
Pteronemidae, synonym of ''
Pteronema''
as well as a species:
* ''
Macropinna microstoma
The Pacific barreleye fish (''Macropinna'') is a genus of ray-finned fish belonging to Opisthoproctidae, the barreleye family. It contains one species, ''M. microstoma''. It is recognized for a highly unusual transparent, fluid-filled shield on ...
'', a fish, the only known species in its genus.
{{Genus disambiguation