Nomaua arborea is a species of Physoglenidae spider endemic to New Zealand.
This species was described in 1988 by Ray Forster from male specimens. The holotype is stored in Otago Museum.
The male is recorded at 3.32mm in length. This species has a yellow brown carapace. The abdomen is patterned dorsally.
This species is only known from Fiordland, New Zealand.
Under the New Zealand Threat Classification System, this species is listed as "Data Deficient" with the qualifiers of "Data Poor: Size", "Data Poor: Trend" and "One Location".