Maniho ngaitahu is a species of spider in the family Desidae that is endemic to New Zealand.
This species was described by Ray Forster and Cecil Wilton in 1973 from female and male specimens. The holotype is stored in Otago Museum.
The female is recorded at 7.3mm in length whereas the male is 7.0mm.
This species is only known from Banks Peninsula, New Zealand.
Under the New Zealand Threat Classification System, this species is listed as "Not Threatened".