Oreo is a genus of Australian araneomorph spiders in the family Trachycosmidae, and was first described by Norman I. Platnick in 2002. The name derives from the Oreo cookie. The type species has a black and white abdomen, although such coloration is common among gallieniellids.

Species it contains five species: Oreo bushbay Platnick, 2002 – Australia (Western Australia) Oreo capensis Platnick, 2002 – Australia (Western Australia) Oreo kidman Platnick, 2002 – Australia (Northern Territory) Oreo muncoonie Platnick, 2002 – Australia (Queensland) Oreo renmark Platnick, 2002 (type) – Australia (South Australia, Queensland to Victoria)

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