Episinus similanus is a species of Theridiidae spider endemic to New Zealand.[1]
This species was described in 1893 by Arthur Urquhart from female specimens.
The female is recorded at 10.7mm in length. The cephalothorax is yellow ochreous with brow markings dorsally. The legs are pale yellow.
This species is only known from Waikato, 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".[2]