Maguireanthus is a monotypic genus of flowering plants belonging to the family Melastomataceae.

[1] The only species is Maguireanthus ayangannae Wurdack.

[2] The genus name of Maguireanthus is in honour of Bassett Maguire (1904–1991), an American botanist, head curator of the New York Botanical Garden, and a leader of scientific expeditions to the Guyana Highlands in Brazil and Venezuela.

[3] The Latin specific epithet of ayangannae refers to Mount Ayanganna in western Guyana in the Pakaraima Mountains.

Both the genus and species were first described and published in Mem.