Thlaosoma olivacea Celaenia olivacea is a species of Araneidae spider that is native to New Zealand.

[1] This species was described as Thlaosoma olivacea in 1885 by Arthur Urquhart from a female specimen collected in Auckland.

[1] The female is record at 5mm in length whereas the male is 1.8mm.

[2][3] This species is only known from the North Island of New Zealand.

[2][3] 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".