''Monotaxis'' is the generic name of two groups of organisms. It can refer to:
*
''Monotaxis'' (fish), a genus of fish in the family Lethrinidae
*
''Monotaxis'' (plant), a genus of plants in the family Euphorbiaceae
* ''Monotaxis'', a genus of moths in the family Geometridae; synonym of ''
Monostoecha
''Monostoecha'' is a monotypic moth genus in the family Geometridae described by David Stephen Fletcher in 1979. Its only species, ''Monostoecha semipectinata'', first described by George Duryea Hulst
George Duryea Hulst (9 March 1846 – 5 ...
''
{{Genus disambiguation