Laminacaris is a genus of extinct stem-group arthropods (Radiodonta) that lived during the Cambrian period.

It is monotypic with a single species Laminacaris chimera, the fossil of which was described from the Chengjiang biota of China in 2018.

[1] Around the same time, two specimens that were similar or of the same species were discovered at the Kinzers Formation in Pennsylvania, USA.

The name is derived from Latin words, lamina meaning thin blade, and caris for crab; the species name refers to a Greek mythological creature, Chimera, that has a body composed of parts of more than one animal.

The biggest endite called shaft endite at the base (towards the body) is small and straight in most Cambrian arthropods, but is large, recurved and bears auxiliary spines in Laminacaris, Anomalocaris briggsi and Pahvantia hastata.