Mangua caswellMangua caswell is a species of Physoglenidae spider endemic to New Zealand.TaxonomyThis species was described in 1990 by Ray Forster from male and female specimens. The holotype is stored in Te Papa Museum under registration number AS.000108.DescriptionThe male is recorded at 3.49mm in length whereas the female is 3.61mm.DistributionThis species is only known from Fiordland, New Zealand.Conservation statusUnder the New Zealand [Threat Classification System], this species is listed as "Data Deficient" with the qualifiers of "Data Poor: Size" and "Data Poor: Trend".