Oparara vallus is a species of spider in the family Desidae that is endemic to New Zealand.Forster, R. R. & Wilton, C. L. (1973). The spiders of New Zealand. Part IV. Otago Museum Bulletin 4: 1-309.
Taxonomy This species was described as Ixeuticus vallus by Brian John Marples in 1959 from female and male specimens.Marples, R. R. (1959). The dictynid spiders of New Zealand. Transactions and Proceedings of the Royal Society of New Zealand 87: 333-361. It was most recently revised in 1973. The holotype is stored in Canterbury Museum.
Description The female is recorded at 5.16mm in length. The cephalothorax is coloured orange brown with black shading laterally. The legs are reddish brown with indistinct bands. The abdomen is darkly coloured.
Distribution This species is only known from Westland, New Zealand.
Conservation status Under the New Zealand Threat Classification System, this species is listed as "Not Threatened".
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