Cantuaria sinclairi is a species of trapdoor spider endemic to New Zealand.
Taxonomy This species was described in 1968 by Ray Forster from female specimens collected in Westland. The holotype is stored at Otago Museum.
Description The female is recorded at 21.5mm in length. The carapace and legs are reddish brown. The abdomen is yellow brown with brown patches on the dorsal surface.
Distribution This species is only known from Moana in Westland, 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", "Data Poor: Trend" and "One Location".
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