Protoerigone obtusa is a species of sheet weaver spider endemic to New Zealand.
Taxonomy This species was described in 1979 by A.D Blest from male and female specimens. The holotype is stored in Otago Museum.
Description The male is recorded at 3.04mm in length whereas the female is 3.2mm. This species has a dark brown cephalothorax. The abdomen has dark and pale markings.
Distribution This species is only known from Stewart Island and the South Island of New Zealand.
Conservation status Under the New Zealand Threat Classification System, this species is listed as "Not Threatened".
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