Mangua sana is a species of Physoglenidae spider endemic to New Zealand.

[1] This species was described in 1990 by Ray Forster from male and female specimens.

[1] This species is only known from Open Bay Island in Westland, New Zealand.

[1] Under the New Zealand Threat Classification System, this species is listed as "Data Deficient" with the qualifiers of "Data Poor: Size", "Data Poor: Trend", "Island Endemic" and "One Location".

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