Phycosoma oecobioides is a species of cobweb spider that is endemic to New Zealand.
This species was described in 1880 by Octavius Pickard-Cambridge from female specimens. It was most recently revised in 2003 and 2004. The holotype is stored in Oxford University Museum of Natural History.
The male is recorded at 2.11mm in length whereas the female is 2.12mm.
This species is widespread throughout New Zealand, including on Chatham Island.
Under the New Zealand Threat Classification System, this species is listed as "Not Threatened".