Mesudus solitarius is a species of Desidae spider that is endemic to New Zealand.Forster, R. R. (1970). The spiders of New Zealand. Part III. Otago Museum Bulletin 3: 1-184.
Taxonomy This species was described as Manawa solitaria by Ray Forster in 1970 from female specimens. The holotype is stored in Canterbury Museum.
Description The female is recorded at 6.3mm in length. The carapace and legs are yellow brown. The abdomen is creamy with dark patches.
Distribution This species is only known from Nelson, New Zealand.
Conservation status Under the New Zealand Threat Classification System, this species is listed as "Data Deficient" with the qualifiers of "Data Poor: Size" and "Data Poor: Trend".
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