尖棘蛛（学名：Gasteracantha fornicata）为金蛛科棘蛛属下的一个种。

Gasteracantha fornicata (northern jewelled spider) is a species of spiny orb-weaver (family Araneidae) found in Queensland Australia. It is similar in shape to Austracantha minax which was originally described as Gasteracantha minax. It was described by Johan Christian Fabricius in 1775, the first Australian species of spider to be named and classified.