What the Stanleycaris hirpex would've looked like if it was alive
An artist's impression of the Stanleycaris hirpex (bottom left) and the Hurdia victoria (Top right) swimming along the Nectocaris
Stanleycaris is an extinct monotypic genus of anomalocarid that existed in Canada, during the Middle Cambrian. It had two one to three centimeter appendages, like most anomalocaridids. The body fossils of it are rare, the most common are the appendages. They are very closely related to Hurdia and Peytoia. They are relatively rare and are only found near the Stanley Glacier. It looks more like the Anomalocaris than any other anomalocaridid.
A possible body fossil of the Stanleycaris hirpex